文章基本信息

标题：High temperature oxidation behaviour of a Ni based superalloy produced by mechanical alloying
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作者：Mehmet ERDEM ; Mehmet TURKER
期刊名称：Scientific Research and Essays
印刷版ISSN：1992-2248
出版年度：2012
卷号：7
期号：48
页码：pp. 4123-4129
DOI：10.5897/SRE11.1823
语种：English
出版社：Academic Journals
摘要：In this study, Ni based superalloy powders (75% Ni, 20% Cr, 4% Al2O3, 0.6% Ti and 0.4% Y2O3), were mechanically alloyed for up to 8 h and were compacted and sintered at 1200°C. Sintered samples were hot-deformed at 1200°C for various amounts and secondary recrystallisation was applied at 1325°C for 1 h. Isothermal oxidation tests were conducted at 1000°C for up to 100 h in air. Surface morphology, fractured surface and chemical composition of the samples were analyzed by using x-ray diffraction (XRD) and scanning electron microscopy (SEM). Cr2O3 film formed on the surface of the samples after exposure in air. Weight change results indicated the samples gained a small weight by increasing the exposure time. All samples exhibited sub-parabolic oxidation behavior.
关键词：Mechanical alloying; powder metallurgy; oxidation; microstructure;superalloy