Reaction sintering of alumina-aluminide alloys (3A)
Reaction sintering of alumina-aluminide alloys (3A)
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DOI：
10.1557/jmr.1996.0364
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发表时间：
1996-11
影响因子：
2.7
通讯作者：
N. Claussen;D. García;R. Janssen
中科院分区：
文献类型：
--
作者：
N. Claussen;D. García;R. Janssen
提出了一种制备Al_2O_3-铝化物合金(3A)的无压反应烧结新工艺。高强度球磨金属氧化物-铝混合物的压坯在真空或惰性气氛中进行热处理，以便放热反应基本上在低于铝熔点的温度下以受控的方式进行。由Ti、Fe、Nb、Mo、Zr、Ni等铝化物互穿网络的各种Al_2O_3基系可获得致密、均匀的显微组织。通过添加氧化物或金属形式的变质剂，可以在很大范围内调节体积、相组成和性能。
A novel pressureless reaction sintering process is presented for the fabrication of Al_2O_3-aluminide alloys (3A). Compacts of intensively milled metal oxide-aluminum mixtures are heat-treated in vacuum or inert atmosphere such that the exothermic reactions take place in a controlled manner essentially at temperatures below the melting point of Al. Dense, homogeneous microstructures were obtained with a variety of Al_2O_3-matrix systems with interpenetrating networks of aluminides of Ti, Fe, Nb, Mo, Zr, Ni, etc. By adding modifiers in the form of oxides or metals, volume and phase composition as well as properties can be tailored in a wide range.