Mechanical alloying and milling
Mechanical alloying and milling
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DOI：
10.4150/kpmi.2006.13.5.371
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发表时间：
2004-09
期刊：
影响因子：
--
通讯作者：
C. Suryanarayana;In-Seop An
中科院分区：
文献类型：
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作者：
C. Suryanarayana;In-Seop An
机械合金化（MA）是一种固态粉末加工技术，涉及粉末颗粒在高能球磨机中的反复焊接、破碎和粉碎。MA最初是为了生产用于航空航天工业的氧化物弥散强化（ODS）镍基和铁基高温合金而开发的，现在已被证明能够从混合元素或预合金粉末开始合成各种平衡和非平衡合金相。合成的非平衡相包括过饱和固溶体、亚稳结晶和准晶相、纳米结构和非晶合金。在讨论了机械合金化的过程和过程变量后，对这些领域的最新进展以及有序金属间化合物的无序化和材料的机械化学合成进行了评述。分析了粉末污染问题，提出了避免或减少粉末污染的方法，并讨论了目前对MA过程建模的认识。介绍了MA的应用现状和发展前景。在可能的情况下，比较了由MA获得的产品相与快速凝固处理（另一种非平衡处理技术）的产品相。
Mechanical alloying (MA) is a solid-state powder processng technique involving repeated welding, fracturing, and rewelding of powder particles in a high-energy ball mill. Originally developed to produce oxide-dispersion strengthened (ODS) nickel- and iron-base superalloys for applications in the aerospace industry, MA has now been shown to be capable of synthesizing a variety of equilibrium and non-equilibrium alloy phases starting from blended elemental or prealloyed powders. The non-equilibrium phases synthesized include supersaturated solid solutions, metastable crystalline and quasicrystalline phases, nanostructures, and amorphous alloys. Recent advances in these areas and also on disordering of ordered intermetallics and mechanochemical synthesis of materials have been critically reviewed after discussing the process and process variables involved in MA. The often vexing problem of powder contamination has been analyzed and methods have been suggested to avoid/minimize it. The present understanding of the modeling of the MA process has also been discussed. The present and potential applications of MA are described. Wherever possible, comparisons have been made on the product phases obtained by MA with those of rapid solidification processing, another non-equilibrium processing technique.