首页> 外文期刊>Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science >X-Ray Photoelectron Spectroscopy and Scanning Auger Microprobe Studies on Oxidation-Induced Embrittlement Mechanism of Liquid-Phase-Sintered 95W-Ni-Fe Alloy
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X-Ray Photoelectron Spectroscopy and Scanning Auger Microprobe Studies on Oxidation-Induced Embrittlement Mechanism of Liquid-Phase-Sintered 95W-Ni-Fe Alloy

机译:X射线光电子能谱和扫描俄歇微探针研究液相烧结95W-Ni-Fe合金的氧化脆化机理

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摘要

The oxidation-induced embrittling mechanism of 95W-Ni-Fe alloy has been studied by X-ray photoelectron spectroscopy (XPS) and scanning Auger microprobe (SAM). Results show that when the alloy oxidizes, WO_2 and WO_3 form around the surface of tungsten particles, and Fe in the bonding phase oxidizes into Fe_2O_3 and FeO on the surface layer of the specimen; thus, surface layer embrittlement occurs as a result of bonding failure between the W particle and the bonding phase. The O diffuses into the matrix of the alloy along interfaces and predominantly segregates on some interfaces, and at the same time, O oxidizes Fe in the bonding phase, thus leading to interface embrittlement and the formation of a bulgy spheroidal fracture.
机译:通过X射线光电子能谱(XPS)和扫描俄歇微探针(SAM)研究了95W-Ni-Fe合金的氧化诱导脆化机理。结果表明,当合金氧化时,钨粒子表面形成WO_2和WO_3,结合相中的Fe在试样表层氧化为Fe_2O_3和FeO。因此,由于W粒子与键合相之间的键合失败而导致表面层脆化。 O沿界面扩散到合金基体中,并主要在某些界面上偏析,同时,O在键合相中氧化铁,从而导致界面脆化和膨胀球体断裂的形成。

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