摘要
Cr-alloyed MoSi2 was compared with monolithic MoSi2 with respect to oxidation at 450 ℃ for 456 h. Phases formed on Cr-alloyed MoSi2 after exposure are Cr2(MoO4)3, MoO3, and cristobalite (SiO2) according to X-ray diffraction results. Monolithic MoSi2 forms MoO3 and mainly amorphous SiO2. X-ray photoelectron spectroscopy indicates that the main oxidation product on the outermost surface is SiO2 for all studied samples. The samples form a relatively loose oxide but the oxide adherence improves with increasing Cr content. It is indicated that Cr addition can benefit pesting control in MoSi2.
Cr-alloyed MoSi2 was compared with monolithic MoSi2 with respect to oxidation at 450℃ for 456 h. Phases formed on Cr-alloygd MoSi2 after exposure are Cr2（MoO4）3, MOO3, and cristobalite （SiO2） according to X-ray diffraction results. Monolithic MoSi2 forms MoO3 and mainly amorphous SiO2. X-ray photoelectron spectroscopy indicates that the main oxidation product on the outermost surface is SiO2 for all studied samples. The samples form a relatively loose oxide but the oxide adherence improves with increasing Cr content. It is indicated that Cr addition can benefit pesting control in MoSi2.
出处
《中国有色金属学会会刊：英文版》
EI
CSCD
2007年第6期1282-1286,共5页
Transactions of Nonferrous Metals Society of China
基金
Project supported by the Swedish Consortium for Materials Use in Energy Applications
