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I. V. Oryshich N. E. Poryadchenko N. P. Brodnikovskii 《Powder Metallurgy and Metal Ceramics》2004,43(9-10):497-503
We have studied the oxidation resistance of chromium intermetallics: TiCr2, HfCr2, and ZrCr2, in the temperature interval 873–1473 K with isothermal holding of the specimens for up to 20 h. We have shown that the intermetallics TiCr2 and HfCr2 are oxidized 2–3 times more slowly than pure titanium and hafnium, but more than 1–2 orders of magnitude faster than chromium at T≤1273 K and 4–6 times faster at 1473 K. In this temperature interval, the intermetallic ZrCr2 is rapidly oxidized at an increasing rate as the heating temperature rises. The scaling resistance of intermetallics of Group IV d metals with chromium is determined by formation of scales in which the major role is played by the oxides TiO2, HfO2, and ZrO2, with weak protective properties. 相似文献
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I. V. Oryshich 《Materials Science》2000,36(1):104-110
We present the results of investigations of chloride corrosion and oxidation of refractory éP539 and éP99 nickel-base alloys.
We established that the heat-resistance of these alloys is rather high up to a temperature of 1273 K, whereas, at a temperature
of 973 K, the chloride corrosion proceeds intensively and has an intercrystalline character. Under the same kinetic conditions,
the rate of chloride corrosion is greater than the rate of oxidation by two to three orders of magnitude. éP539 alloy is more
resistant against chloride corrosion than éP99 alloy by a factor of 1.1–1.3, but the heat-resistance of the former is less
than that of the latter by the same factor.
Frantsevich Institute for Problems of Materials Technology, Ukrainian National Academy of Sciences, Kiev. Translated from
Fizyko-Khimichna Mekhanika Materialiv, Vol. 36, No. 1, pp. 87–92. January–February, 2000. 相似文献
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A. N. Rakitskii N. E. Poryadchenko N. I. Panarina I. V. Oryshich A. V. Samelyuk 《Materials Science》1996,31(2):257-262
We study the influence of alloying elements (La, V, Al, Si) on the mechanism of interaction of chromium with NaCl and Na2SO4 salt melts at a temperature of 900°C. Alloying elements form chemically stable scales with enhanced adhesive properties and reduce the rate of salt corrosion largely due to a decrease in the share of grain-boundary damage.Institute of Problems in Materials Science, Ukrainian Academy of Sciences, Kiev. Translated from Fiziko-Khimicheskaya Mekhanika Materialov, Vol. 31, No. 2, pp. 103–108, March – April, 1995. 相似文献
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I. V. Oryshich 《Protection of Metals》2006,42(6):596-600
High-temperature chloride corrosion (ChC) of ЭИ827 and BЖ-85 nickel alloys was investigated in a temperature range of 773 to 1173 K and exposure time of 1 to 50 h
in the MgCl2-KCl-NaCl ternary eutectic and oxidation in air (at 873 to 1273 K for 500 h). The ChC is intergranular, intensely develops
starting from a temperature of 973 K, and results in softening due to the strong extraction of chromium and aluminum from
the base alloy. Other things being equal, the ChC rate exceeds the oxidation rate in air by two to three orders of magnitude.
Original Russian Text ? I.V. Oryshich, 2006, published in Zashchita Metallov, 2006, Vol. 42, No. 6, pp. 640–644. 相似文献
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