Cyclic Oxidation Behaviors of MoSi2 with Different Relative Density
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2008年第5期
论文作者：颜建辉
文章页码：699 - 703
摘 要：The influence of different relative density on the cyclic oxidation behaviors of MoSi2 at 1 273 K were studied. "Pesting" was not found in all MoSi2 materials after being oxidized for 480 h. All samples exhibited continuous mass gain during the oxidation process. The mass gains of MoSi2 with the lowest relative density （78.6%） and the highest relative density （94.8%） are in-creased by 8.15 mg·cm-2 and 3.48 mg·cm-2, respectively. The surface of the material with lower rela-tive density formed a loose, porous and discontinuous oxidation scale, which accelerated oxygen dif-fusion and aggravated the oxidation process. However, a dense scale in the material with higher rela-tive density is formed, which acts a diffusion barrier to the oxygen atoms penetrating into the matrix. The high temperature oxidation resistance of MoSi2 can be improved by increasing its relative den-sity.
颜建辉
摘 要：The influence of different relative density on the cyclic oxidation behaviors of MoSi2 at 1 273 K were studied. "Pesting" was not found in all MoSi2 materials after being oxidized for 480 h. All samples exhibited continuous mass gain during the oxidation process. The mass gains of MoSi2 with the lowest relative density （78.6%） and the highest relative density （94.8%） are in-creased by 8.15 mg·cm-2 and 3.48 mg·cm-2, respectively. The surface of the material with lower rela-tive density formed a loose, porous and discontinuous oxidation scale, which accelerated oxygen dif-fusion and aggravated the oxidation process. However, a dense scale in the material with higher rela-tive density is formed, which acts a diffusion barrier to the oxygen atoms penetrating into the matrix. The high temperature oxidation resistance of MoSi2 can be improved by increasing its relative den-sity.
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