Electron microscopy study of the microstructure of Ni–W substrate surface. / Ovcharov, A. V.; Karateev, I. A.; Mikhutkin, A. A.; Orekhov, A. S.; Presniakov, M. Yu; Chernykh, I. A.; Zanaveskin, M. L.; Kovalchuk, M. V.; Vasiliev, A. L.
In: Crystallography Reports, Vol. 61, No. 6, 01.11.2016, p. 1002-1007.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Electron microscopy study of the microstructure of Ni–W substrate surface
AU - Ovcharov, A. V.
AU - Karateev, I. A.
AU - Mikhutkin, A. A.
AU - Orekhov, A. S.
AU - Presniakov, M. Yu
AU - Chernykh, I. A.
AU - Zanaveskin, M. L.
AU - Kovalchuk, M. V.
AU - Vasiliev, A. L.
N1 - Publisher Copyright: © 2016, Pleiades Publishing, Inc.
PY - 2016/11/1
Y1 - 2016/11/1
N2 - The surface microstructure of Ni–W alloy tapes, which are used as substrates to form films of high-temperature superconductors and photovoltaic devices, has been studied. Several samples of a Ni95W5 tape (Evico) annealed under different conditions were analyzed using scanning electron microscopy, energy-dispersive X-ray microanalysis, electron diffraction, and electron energy-loss spectroscopy. NiWO4 precipitates are found on the surface of annealed samples. The growth of precipitates at a temperature of 950°С is accompanied by the formation of pores on the surface or under an oxide film. Depressions with a wedge-shaped profile are found at the grain boundaries. Annealing in a reducing atmosphere using a specially prepared chamber allows one to form a surface free of nickel tungstate precipitates.
AB - The surface microstructure of Ni–W alloy tapes, which are used as substrates to form films of high-temperature superconductors and photovoltaic devices, has been studied. Several samples of a Ni95W5 tape (Evico) annealed under different conditions were analyzed using scanning electron microscopy, energy-dispersive X-ray microanalysis, electron diffraction, and electron energy-loss spectroscopy. NiWO4 precipitates are found on the surface of annealed samples. The growth of precipitates at a temperature of 950°С is accompanied by the formation of pores on the surface or under an oxide film. Depressions with a wedge-shaped profile are found at the grain boundaries. Annealing in a reducing atmosphere using a specially prepared chamber allows one to form a surface free of nickel tungstate precipitates.
UR - http://www.scopus.com/inward/record.url?scp=84995395307&partnerID=8YFLogxK
U2 - 10.1134/S1063774516060109
DO - 10.1134/S1063774516060109
M3 - Article
AN - SCOPUS:84995395307
VL - 61
SP - 1002
EP - 1007
JO - Crystallography Reports
JF - Crystallography Reports
SN - 1063-7745
IS - 6
ER -
ID: 88202502