摘要
无压烧结制备了不同体积比的Mo/Al2O3复相材料,对Mo/Al2O3复相材料进行了微观分析和抗酸腐蚀研究。经1440℃烧结,含60%(体积分数,下同)Mo的Mo/Al2O3材料中,Al2O3分布不均匀,而含40%Mo的Mo/Al2O3材料中Mo的分布不均匀。电子探针成分分析发现:Mo和Al2O3之间无明显的相扩散。酸液腐蚀试验表明:Mo/Al2O3复相材料具有抗盐酸、硫酸和氢氟酸腐蚀的能力,其中抗盐酸腐蚀的效果最好;Mo/Al2O3复相材料不抗硝酸的腐蚀,腐蚀首先发生在Mo和Al2O3的界面上。
Molybdenum-alumina （Mo/Al2O3） composites with different volume ratio of Mo to Al2O3 were prepared by pressure less sintering. Their microstructure and corrosion resistance to acid were studied. After sintered at 1440 ℃, the Al2O3 phase distribution in the Mo/Al2O3 composite with 60%（volume fraction, the same below） Mo is unevenly, but the Mo phase distribution in the Mo/Al2O3 composite with 40% Mo is unevenly. It was found by composition analysis with election probe that there is no obvious diffusion between the Mo and Al2O3 phases. The acid corrosion tests show that the Mo/Al2O3 composites have resistant ability to the corrosions of hydrochloric, sulfuric and hydrofluoric acids; and the best corrosion resistance to the hydrochloric acid. The Mo/Al2O3 composites couldn＇t be resistant to nitric acid corrosion. The corrosion first occurs in the boundary of molybdenum and alumina.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2008年第8期1124-1128,共5页
Journal of The Chinese Ceramic Society
基金
山东省自然科学基金(Y2007F32)资助項目
关键词
钼
氧化铝
烧结
腐蚀
微观结构
molybdenum
alumina, sintering
corrosion
microstructure
