Structural transformations occurring in flame-sprayed Ni60Nb40 alloy coatings during heating in the presence of oxygen

被引：0
|
作者：
Borisov, Yu.S. [1 ]
Korzhik, V.N. [1 ]
Gritskiv, Ya.P. [1 ]
Kunitskii, Yu.A. [1 ]
机构：
[1] Acad of Sciences of the Ukrainian, SSR, Russia
来源：
Soviet powder metallurgy and metal ceramics | 1988年 / 26卷 / 12期
关键词：
Nickel Metallography - Transformations - Nickel Niobium Alloys - Amorphous - Powder Metallurgy - Nickel - Protective Coatings - Powder;
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摘要：
Ni-Nb alloy coatings of thicknesses up to 250 um, applied by plasma-arc spraying to a copper plate, were investigated to determine structural transformations during heating in the presence of oxygen. X-ray diffraction exhibited intense haloes characteristic of amorphous materials and crystalline inclusions of niobium oxide. Crystallization occurred at 750° K through the formation of niobium oxide and the precipitation of nickel. Decomposition of the amorphous matrix was accompanied by a decrease in length of the coatings.
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页码：966 / 970
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