kth.sePublications
Change search
Link to record
Permanent link

Direct link
Grishin, Alexander M.ORCID iD iconorcid.org/0000-0002-4997-9032
Alternative names
Publications (10 of 48) Show all publications
Grishin, A. M. & Putrolaynen, V. V. (2023). Hard and Highly Adhesive AlMgB14 Coatings RF Sputtered on Tungsten Carbide and High-Speed Steel. Materials, 16(21), Article ID 6930.
Open this publication in new window or tab >>Hard and Highly Adhesive AlMgB14 Coatings RF Sputtered on Tungsten Carbide and High-Speed Steel
2023 (English)In: Materials, E-ISSN 1996-1944, Vol. 16, no 21, article id 6930Article in journal (Refereed) Published
Abstract [en]

We report a new industrial application of aluminum magnesium boride AlMgB14 (BAM) coatings to enhance the hardness of tungsten carbide ceramic (WC-Co) and high-speed steel tools. BAM films were deposited by RF magnetron sputtering of a single dense stoichiometric ceramic target onto commercial WC-Co turning inserts and R6M5 steel drill bits. High target sputtering power and sufficiently short target-to-substrate distance were found to be critical processing conditions. Very smooth (6.6 nm RMS surface roughness onto Si wafers) and hard AlMgB14 coatings enhance the hardness of WC-Co inserts and high-speed R6M5 steel by a factor of two and three, respectively. Complete coating spallation failure occurred at a scratch adhesion strength of 18 N. High work of adhesion and low friction coefficient, estimated for BAM onto drill bits, was as high as 64 J/m2 and as low as 0.07, respectively, more than twice the surpass characteristics of N-doped diamond-like carbon (DLC) films deposited onto nitride high-speed W6Mo5Cr4V2 steel.

Place, publisher, year, edition, pages
MDPI AG, 2023
Keywords
elastic recovery ratio, elastic strain index, friction coefficient, micro and nanohardness, resistance to plastic deformation ratio, work of adhesion
National Category
Manufacturing, Surface and Joining Technology Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Identifiers
urn:nbn:se:kth:diva-340113 (URN)10.3390/ma16216930 (DOI)2-s2.0-85176306796 (Scopus ID)
Note

QC 20231128

Available from: 2023-11-28 Created: 2023-11-28 Last updated: 2024-07-04Bibliographically approved
Grishin, A. M. (2022). Microstructure and Intrinsic Strain of Nanocrystals in Ferroelectric (Na,K)NbO3 Nanofibers. Nanomaterials, 12(9), Article ID 1541.
Open this publication in new window or tab >>Microstructure and Intrinsic Strain of Nanocrystals in Ferroelectric (Na,K)NbO3 Nanofibers
2022 (English)In: Nanomaterials, E-ISSN 2079-4991, Vol. 12, no 9, article id 1541Article in journal (Refereed) Published
Abstract [en]

Densely woven highly crystallized biocompatible sodium-potassium niobate Na0.35K0.65NbO3 fibers with an average diameter of 100-200 nm and several hundreds of microns in length were sintered by the sol-gel calcination-assisted electrospinning technique. X-ray diffraction (XRD) and high-resolution transmission electron microscopy (TEM) confirmed preferential cube-on-cube [001] orientation of nanocrystals within the fiber's body, separated by a low angle grain boundary. The Williamson-Hall method was employed to analyze the broadening of XRD reflections and to accurately determine the size and intrinsic strain of nanocrystal fiber aggregates. The main objective of this article is to test the potential capacity of direct XRD analysis to noninvasively control crystallite size and lattice distortion in core-shell coaxial nanofibers.

Place, publisher, year, edition, pages
MDPI AG, 2022
Keywords
nanofibers, lead-free, biocompatibility, ferroelectricity, crystal lattice parameters, fibers morphology, nanocrystals intrinsic strain
National Category
Physical Chemistry Composite Science and Engineering Condensed Matter Physics
Identifiers
urn:nbn:se:kth:diva-313036 (URN)10.3390/nano12091541 (DOI)000795258100001 ()35564250 (PubMedID)2-s2.0-85129207373 (Scopus ID)
Note

QC 20220531

Available from: 2022-05-31 Created: 2022-05-31 Last updated: 2022-06-25Bibliographically approved
Grishin, A. M., Ignakhin, V. S., Lugovskaya, L. A., Osaulenko, R. N. & Sekirin, I. ,. (2020). Crystallization kinetics and magnetostriction properties of amorphous Fe 80-x Co x P 14 B 6 metallic glasses. Journal of Magnetism and Magnetic Materials, 512, Article ID 166972.
Open this publication in new window or tab >>Crystallization kinetics and magnetostriction properties of amorphous Fe 80-x Co x P 14 B 6 metallic glasses
Show others...
2020 (English)In: Journal of Magnetism and Magnetic Materials, ISSN 0304-8853, E-ISSN 1873-4766, Vol. 512, article id 166972Article in journal (Refereed) Published
Abstract [en]

Formation mechanism and crystallization kinetics were studied in series of rapidly solidified metallic glasses Fe80- xCoxP14B6 with x = 23, 25, 28, 32, 35 and 40 at.%. As soft magnetic materials, they surpass characteristics of commercial Iron-Nickel Metglas® 2826 alloy: differential permeability of as quenched amorphous ribbons is of about 110,000, the saturation induction μoMs = 1.45–1.5 T, coercive field as low as 4 A/m, Curie temperature above 700 K, and significantly higher thermal stability. Isochronal and isothermal differential scanning calorimetry was employed to record the latent heat developed during crystallization. For both regimes, X-ray diffraction revealed two immiscible bcc α-FeCo and bct (Fe,Co)3(P,B) phases that crystallize from completely miscible amorphous glass matrix. Theoretical description of observed kinetics of crystallization process was convincingly accomplished within Kolmogorov-Johnson-Mehl-Avrami model. Enhanced thermal stability of iron-rich Fe80- xCoxP14B6 glasses that crystalize at higher temperatures relies upon higher crystal/glass interfacial energy.

Place, publisher, year, edition, pages
Elsevier, 2020
National Category
Materials Engineering
Identifiers
urn:nbn:se:kth:diva-277998 (URN)10.1016/j.jmmm.2020.166972 (DOI)000539946400005 ()2-s2.0-85085736174 (Scopus ID)
Note

QC 20200703

Available from: 2020-07-03 Created: 2020-07-03 Last updated: 2022-06-26Bibliographically approved
Grishin, A. M. (2020). Hardness, Young's Modulus and Elastic Recovery in Magnetron Sputtered Amorphous AlMgB14 Films. Crystals, 10(9), Article ID 823.
Open this publication in new window or tab >>Hardness, Young's Modulus and Elastic Recovery in Magnetron Sputtered Amorphous AlMgB14 Films
2020 (English)In: Crystals, ISSN 2073-4352, Vol. 10, no 9, article id 823Article in journal (Refereed) Published
Abstract [en]

We report optical and mechanical properties of hard aluminum magnesium boride films magnetron sputtered from a stoichiometric AlMgB14 ceramic target onto Corning (R) 1737 Glass and Si (100) wafers. High target sputtering rf-power and sufficiently short target-to-substrate distance appeared to be critical processing conditions. Amorphous AlMgB14 films demonstrate very strong indentation size effect (ISE): exceptionally high nanohardness H = 88 GPa and elastic Young's modulus E* = 517 GPa at 26nmof the diamond probe penetration depth and almost constant values, respectively, of about 35 GPa and 275 GPa starting at depths of about 2-3% of films' thickness. For comparative analysis of elastic strain to failure index H/E*, resistance to plastic deformation ratio H-3/E*(2) and elastic recovery ratio W-e were obtained in nanoindentation tests performed in a wide range of loading forces from 0.5 to 40 mN. High authentic numerical values of H = 50 GPa and E* = 340 GPa correlate with as low as only 10% of total energy dissipating through the plastic deformations.

Place, publisher, year, edition, pages
MDPI, 2020
Keywords
optical refractive index and extinction coefficient, Raman icosahedral boron-boron vibrations, elastic and plastic energies, hardness, Young's modulus
National Category
Chemical Sciences
Identifiers
urn:nbn:se:kth:diva-285628 (URN)10.3390/cryst10090823 (DOI)000580117800001 ()2-s2.0-85090991436 (Scopus ID)
Note

QC 20201110

Available from: 2020-11-10 Created: 2020-11-10 Last updated: 2022-06-25Bibliographically approved
Grishin, A. M. & Khartsev, S. (2020). Optical dispersion and temperature dependent latching-type magneto-optical properties of magnetron sputtered Bi3Fe3.34Ga1.66O12 (001) and (111) films. Thin Solid Films, 699, Article ID 137894.
Open this publication in new window or tab >>Optical dispersion and temperature dependent latching-type magneto-optical properties of magnetron sputtered Bi3Fe3.34Ga1.66O12 (001) and (111) films
2020 (English)In: Thin Solid Films, ISSN 0040-6090, E-ISSN 1879-2731, Vol. 699, article id 137894Article in journal (Refereed) Published
Abstract [en]

We report on optical dispersion and temperature dependence of latching-type magneto-optical properties of heavily Ga-doped bismuth iron garnet films rf-magnetron sputtered onto Gd3Ga5O12 (001) and (111) substrates. At lambda = 677 nm and room temperature, epitaxial Bi3Fe3.34Ga1.66O12 (001) and (111) films show, respectively, saturation Faraday rotation theta(Fsat) = - 0.92 x 10(4) and - 1.05 x 10(4) deg/cm, transmittance T = 0.86 and 0.81, magnetic hysteresis theta(F)-H loop squareness theta(Frem)/theta(Fsat) = 0.84 and 1.0, and coercive field H-c = 6.76 and 24.03 kA/m. Film's Faraday rotation is nicely fitted by molecular field Neel theory in the whole temperature range from T-C = 316 K down to 85 K where theta(Fsat) = - 1.9 x 10(4) deg/cm and H-c = 151.20 kA/m.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE SA, 2020
National Category
Embedded Systems
Identifiers
urn:nbn:se:kth:diva-271709 (URN)10.1016/j.tsf.2020.137894 (DOI)000520168900011 ()2-s2.0-85081119672 (Scopus ID)
Note

QC 20200421

Available from: 2020-04-21 Created: 2020-04-21 Last updated: 2022-06-26Bibliographically approved
Sekirin, I. V., Ignakhin, V. S., Severikov, V. S. & Grishin, A. M. (2019). Determination of saturation magnetostriction of amorphous Fe-Co-P-B ribbons: Comparison of various methods. In: VII Euro-Asian Symposium "Trends in Magnetism" 8–13 September 2019, Ekaterinburg, Russian Federation: . Paper presented at 7th Euro-Asian Symposium on Trends in Magnetism, EASTMAG 2019; Ekaterinburg; Russian Federation; 8 September 2019 through 13 September 2019. Institute of Physics Publishing (IOPP), 1389(1)
Open this publication in new window or tab >>Determination of saturation magnetostriction of amorphous Fe-Co-P-B ribbons: Comparison of various methods
2019 (English)In: VII Euro-Asian Symposium "Trends in Magnetism" 8–13 September 2019, Ekaterinburg, Russian Federation, Institute of Physics Publishing (IOPP), 2019, Vol. 1389, no 1Conference paper, Published paper (Refereed)
Abstract [en]

We present and compare results of measurement of saturation magnetostriction constants of amorphous ribbons Fe80-xCo x P14B6 (x = 23, 25, 28, 32, 40 at.%) and the reference Fe40Ni40P14B6 specimen employing Narita and Becker-Kersten methods. We also modified a strain gauge-based method to enable measurements of complete magnetic field dependence of magnetostriction coefficients.

Place, publisher, year, edition, pages
Institute of Physics Publishing (IOPP), 2019
Series
Journal of Physics: Conference Series, ISSN 1742-6588 ; 1389
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-267886 (URN)10.1088/1742-6596/1389/1/012089 (DOI)000562319800089 ()2-s2.0-85076780634 (Scopus ID)
Conference
7th Euro-Asian Symposium on Trends in Magnetism, EASTMAG 2019; Ekaterinburg; Russian Federation; 8 September 2019 through 13 September 2019
Note

QC 20200603

Available from: 2020-06-03 Created: 2020-06-03 Last updated: 2024-03-15Bibliographically approved
Choopani, S., Samavat, F., Kolobova, E. N. & Grishin, A. M. (2019). Ferromagnetic resonance and magnetic anisotropy in biocompatible Y3Fe5O12@Na0.5K0.5NbO3 core-shell nanofibers. Ceramics International, 46(2), 2072-2078
Open this publication in new window or tab >>Ferromagnetic resonance and magnetic anisotropy in biocompatible Y3Fe5O12@Na0.5K0.5NbO3 core-shell nanofibers
2019 (English)In: Ceramics International, ISSN 0272-8842, E-ISSN 1873-3956, Vol. 46, no 2, p. 2072-2078Article in journal (Refereed) Published
Abstract [en]

Y3Fe5O12@Na0.5K0.5NbO3 (YIG@NKN) core-shell nanofibers were synthesized by the coaxial electrospinning technique. For comparison, samples of YIG and NKN nanofibers were prepared. Scanning Electron Microscopy (SEM) and 3D laser-scanning confocal microscopy (TDLM) of YIG@NKN nanofibers revealed long uniform size distributed fibers with the average diameter of 100–150 nm. X-Ray diffraction (XRD) examination shows the existence of the distinct peaks of orthorhombic NKN and cubic YIG. Magnetic force microscopy (MFM) of individual YIG@NKN nanofiber demonstrates a magnetic core that is extended in one half of the diameter of the fiber. These nanofibers show obvious Ferromagnetic resonance (FMR) with resonance near 2 KOe similar to YIG fibers but in such a way that it starts to increase linearly with applying magnetic field from zero up to near resonance field. Also they show a soft magnetic behavior with saturation magnetization of 10 emu/gr. Furthermore, we propose a model to explain line shape of randomly oriented fibers and extract all the magnetic anisotropy parameters from FMR data. The results rely the shape anisotropy as dominant effect, however the dipolar field among fibers should be considered. The highest degree of asymmetry observed in the case of core-shell fibers in hard direction that it can be originated from magneto electric effects. By taking into account the observed FMR, the ability of adequate control of microwave absorption by applying magnetic field and biocompatibility, the synthesized core-shell nanofibers are the most promising candidate for clinical application such as microwave cancer thermotherapy and adjustable microwave absorbers.

Place, publisher, year, edition, pages
Elsevier Ltd, 2019
Keywords
Coaxial electrospinning, Core-shell fibers, Ferromagnetic resonance, Biocompatibility, Electrospinning, Ferromagnetic materials, Ferromagnetism, Fibers, Magnetic fields, Magnetic force microscopy, Nanofibers, Saturation magnetization, Scanning electron microscopy, Shells (structures), Anisotropy parameters, Clinical application, Core-shell nanofibers, Ferromagnetic resonance (FMR), Magnetic force microscopies (MFM), Microwave absorption, Magnetic anisotropy
National Category
Other Materials Engineering
Identifiers
urn:nbn:se:kth:diva-263252 (URN)10.1016/j.ceramint.2019.09.187 (DOI)000527383100093 ()2-s2.0-85072383167 (Scopus ID)
Note

QC 20191106

Available from: 2019-11-06 Created: 2019-11-06 Last updated: 2022-06-26Bibliographically approved
Ignakhin, V. S., Severikov, V. S. & Grishin, A. M. (2019). Tensile and torsional strain gauge based on Fe48Co32P14B6 metallic glass. Journal of Magnetism and Magnetic Materials, 476, 382-386
Open this publication in new window or tab >>Tensile and torsional strain gauge based on Fe48Co32P14B6 metallic glass
2019 (English)In: Journal of Magnetism and Magnetic Materials, ISSN 0304-8853, E-ISSN 1873-4766, Vol. 476, p. 382-386Article in journal (Refereed) Published
Abstract [en]

We evaluate properties of the prototype of a strain gauge capable to discriminate different strain components: tension and torsion. It makes use of magnetoelastic effect in new Fe48Co32P14B6 metallic glass. As a sensing material, it surpasses characteristics of commercial Iron-Nickel Metglas (R) alloy: relative differential permeability of as quenched amorphous ribbon is of about 110000, the saturation induction B-s = 1.45 T, coercive field as low as 4 A/m, Curie temperature above 700 K, and significantly higher thermal stability. Different deformation components were determined through the analyses of the shape of hysteresis B-H loops. Fe-Co-P-B glass strain gauge can simultaneously detect as small tensile strains as 1.9 x 10(-5) and less than 0.13 deg/cm of torsional distortions.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE BV, 2019
National Category
Materials Engineering
Identifiers
urn:nbn:se:kth:diva-244077 (URN)10.1016/j.jmmm.2019.01.006 (DOI)000456696000060 ()2-s2.0-85059550163 (Scopus ID)
Note

QC 20190219

Available from: 2019-02-19 Created: 2019-02-19 Last updated: 2022-11-28Bibliographically approved
Grishin, A. M. & Khartsev, S. (2019). Waveguiding in All-Garnet Heteroepitaxial Magneto-Optical Photonic Crystals. JETP Letters: Journal of Experimental And Theoretical Physics Letters, 109(2), 83-86
Open this publication in new window or tab >>Waveguiding in All-Garnet Heteroepitaxial Magneto-Optical Photonic Crystals
2019 (English)In: JETP Letters: Journal of Experimental And Theoretical Physics Letters, ISSN 0021-3640, E-ISSN 1090-6487, Vol. 109, no 2, p. 83-86Article in journal (Refereed) Published
Abstract [en]

We report the properties of 1D all-garnet heteroepitaxial 21 layered magneto-optical photonic crystal designed and fabricated for the resonance wavelength 750 +/- 3 nm. It is composed of alternating magnetooptical-active Bi3Fe5O12 and transparent Sm3Ga5O12 quarter-wavelength layers radio frequency magnetron sputtered onto single crystalline Ca, Mg, Zr:Gd3Ga5O12(111) substrate. Edges of the band gap and resonant central peaks in transmission and Faraday rotation spectra experience significant (about 60 nm) "blueshift" when the angle of light incidence increases up to 70 degrees. Lower reflectance and strong enhancement of Faraday rotation of TE mode compared to the TM-polarized light testify a waveguiding of TE-mode within a resonant lambda/2 Bi3Fe5O12 cavity.

Place, publisher, year, edition, pages
MAIK NAUKA/INTERPERIODICA/SPRINGER, 2019
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-252414 (URN)10.1134/S0021364019020012 (DOI)000467096800002 ()2-s2.0-85060185850 (Scopus ID)
Note

QC 20190614

Available from: 2019-06-14 Created: 2019-06-14 Last updated: 2022-06-26Bibliographically approved
Severikov, V. S., Grishin, A. M. & Ignakhin, V. S. (2018). Magnetostriction in Fe80-xCoxP14B6 amorphous ribbons evaluated by Becker-Kersten method. In: Journal of Physics: Conference Series. Paper presented at International Conference PhysicA.SPb 2017, 24 October 2017 through 26 October 2017. Institute of Physics Publishing (IOPP), 1038(1), Article ID 012066.
Open this publication in new window or tab >>Magnetostriction in Fe80-xCoxP14B6 amorphous ribbons evaluated by Becker-Kersten method
2018 (English)In: Journal of Physics: Conference Series, Institute of Physics Publishing (IOPP), 2018, Vol. 1038, no 1, article id 012066Conference paper, Published paper (Refereed)
Abstract [en]

Becker-Kersten method, which involves observing hysteresis M-H loops under mechanical stress, was applied to measure magnetostriction properties in amorphous rapid quenched ribbons Fe80-xCoxP14B6. It is shown that magnetostriction constant increases with the growth of cobalt atomic content from (1.75 ± 0.13)×10-6 for x = 25 to (1.60 ± 0.05)×10-5 for x = 40.

Place, publisher, year, edition, pages
Institute of Physics Publishing (IOPP), 2018
Series
Journal of Physics: Conference Series, ISSN 1742-6588 ; 1038
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-238190 (URN)10.1088/1742-6596/1038/1/012066 (DOI)000454825500066 ()2-s2.0-85049529139 (Scopus ID)
Conference
International Conference PhysicA.SPb 2017, 24 October 2017 through 26 October 2017
Note

QC 20181119

Available from: 2018-11-19 Created: 2018-11-19 Last updated: 2022-06-26Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-4997-9032

Search in DiVA

Show all publications