| MoSi2低温氧化生成相的热力学分析 |
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| 引用本文： | 张厚安,胡小平,王军,唐果宁,刘心宇.MoSi2低温氧化生成相的热力学分析[J].湖南科技大学学报(自然科学版),2000,15(3). |
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| 作者姓名： | 张厚安 胡小平 王军 唐果宁 刘心宇 |
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| 作者单位： | 1. 湘潭工学院,机械工程系,湖南,湘潭,411201
2. 中南大学,材料科学与工程系,湖南,长沙,410083 |
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| 基金项目： | 煤炭部优秀青年基金!资助 (项目编号 :97- 0 73) |
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| 摘 要： | 利用金属氧化理论 ,从热力学角度分析了MoSi2 低温长时间氧化后 ,表面氧化层中不同相存在的可能性和优先性 ,并讨论了挥发性MoO3相生成的条件 结果表明 :4种氧化反应均能在空气中自发进行 ;从反应进行的难易次序说明了实验中MoSi2 材料低温氧化时生成的Mo8O2 3相衍射峰强较大 ,而Mo5 Si3相峰强较小、且未出现MoO3相的原因 ;指出了Mo8O2 3转化为挥发性MoO3相的氧压条件 ,从而为避免“PEST”现象提供理论依据 图 1 ,表 3,参 1 1
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| 关 键 词： | MoSi_2 热力学分析 低温氧化 |
Thermodynamics analysis of oxidationphase of MoSi2 at low- temperature |
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| ZHANG Hou-an ,HU Xiao-ping ,WANG Jun ,TANG Guo-ning ,LIU Xin-yu.Thermodynamics analysis of oxidationphase of MoSi2 at low- temperature[J].Journal of Hunan University of Science & Technology(Natural Science Editon),2000,15(3). |
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| Authors: | ZHANG Hou-an HU Xiao-ping WANG Jun TANG Guo-ning LIU Xin-yu |
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| Institution: | ZHANG Hou-an 1,HU Xiao-ping 1,WANG Jun 1,TANG Guo-ning 1,LIU Xin-yu 2 |
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| Abstract: | In this paper the possibility and priority of different phase in oxidation layer of MoSi 2 after oxidized at low-temperature are analyzed according to thermodynamics and metal-oxidation theory.And the condition of existing MoO 3 is studied too.The result shows that the four kinds of oxidation reaction all can occur in air.The reason is illustrated about the fact of higher diffract peak value of Mo 8O 23 and lower diffract peak value of Mo 5Si 3 and no MoO 3 phase in experiment of MoSi 2 after oxidized in air.And the oxygen-decompose-pressure's condition that Mo 8O 23 will turned into volatile MoO 3 has been pointed out.So it is helpful to avoid pest phenomenon of MoSi 2.1fig.,3tabs.,11refs. |
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| Keywords: | MoSi 2 thermodynamics analysis low-temperature oxidation |
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