Environmental Resistance of Mo–Si–B Alloys and Coatings

被引:0
作者
J. H. Perepezko
R. Sakidja
机构
[1] University of Wisconsin-Madison,Department of Materials Science & Engineering
来源
Oxidation of Metals | 2013年 / 80卷
关键词
MoSiB Alloys and Coatings; Borosilicides; Pack Cementation; Water vapor;
D O I
暂无
中图分类号
学科分类号
摘要
For high temperature application beyond the range of Ni-base superalloys, multiphase Mo–Si–B alloys with compositions, that yield the ternary intermetallic Mo5SiB2 (T2) phase as a key microstructure constituent together with the Mo and Mo3Si phases, offer an attractive balance of high melting temperature, oxidation resistance and mechanical properties. The investigation of reaction kinetics involving the T2 phase enables the analysis of oxidation in terms of diffusion pathways and the design of effective coatings. From this basis kinetic biasing is used together with pack cementation to develop multilayered coatings and in situ diffusion barriers with self-healing characteristics for enhanced oxidation resistance. While a combustion environment contains water vapor that can accelerate attack of silica based coatings, the current pack cementation coatings provide oxidation resistance in water vapor up to at least 1500 °C. An exposure to hot ionized gas species generated in an arc jet confirms the robust coating performance in extreme environments.
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页码:207 / 218
页数:11
相关论文
共 88 条
[1]  
Perepezko JH(2009)undefined Science 326 1068-533
[2]  
Dimiduk DM(2003)undefined MRS Bulletin 28 639-919
[3]  
Perepezko JH(2007)undefined Journal of Nuclear Materials 366 407-343
[4]  
Sakidja R(2008)undefined Acta Materialia 56 5223-undefined
[5]  
Perepezko JH(2005)undefined Metallurgical and Materials Transactions A 36A 525-undefined
[6]  
Sakidja R(2006)undefined JOM Journal of the Minerals Metals and Materials Society 58 22-undefined
[7]  
Perepezko JH(1960)undefined Journal of Chemical Physics 33 530-undefined
[8]  
Kim S(2004)undefined Journal of Materials Science 39 5905-undefined
[9]  
Sekido N(2003)undefined Progress in Aerospace Science 39 511-undefined
[10]  
Schneibel JH(2008)undefined Composites Science and Technology 68 1718-undefined