EVIDENCE FOR SELF-SUSTAINED MOSI2 FORMATION DURING ROOM-TEMPERATURE HIGH-ENERGY BALL-MILLING OF ELEMENTAL POWDERS

被引：84

作者：

MA, E ^{[1
]}

PAGAN, J ^{[1
]}

CRANFORD, G ^{[1
]}

ATZMON, M ^{[1
]}

机构：

[1] UNIV MICHIGAN,DEPT NUCL ENGN,ANN ARBOR,MI 48109

来源：

JOURNAL OF MATERIALS RESEARCH | 1993年 / 8卷 / 08期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1557/JMR.1993.1836

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present evidence indicating that rapid, self-sustained, high-temperature reactions play an important role in the formation of tetragonal MoSi2 during room-temperature high-energy ball milling of elemental powders. Such reactions appear to be ignited by mechanical impact in an intimate, fine-grained, Mo-Si physical mixture formed after an initial milling period. Under certain conditions, limited propagation of self-sustained reactions in these uncompacted powder mixtures renders the compound formation seemingly gradual in bulk-averaged analysis. It is suggested that this type of reaction is an important mechanism in the mechanical alloying of highly exothermic systems. Results are discussed in comparison with similar reactions we observed in ball-milled Al-Ni powders, with self-sustained combustion synthesis previously reported for Mo-Si powders, and with interfacial diffusional reactions in Mo-Si powders or thin-film diffusion couples.

引用

页码：1836 / 1844

页数：9

共 31 条

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