SOLIDIFICATION PROCESSING OF HIGH-TEMPERATURE INTERMETALLIC EUTECTIC-BASED ALLOYS
SOLIDIFICATION PROCESSING OF HIGH-TEMPERATURE INTERMETALLIC EUTECTIC-BASED ALLOYS
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DOI：
10.1016/0921-5093(95)03299-1
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发表时间：
1995-02-28
期刊：
影响因子：
6.4
通讯作者：
SUTLIFF, JA
中科院分区：
文献类型：
--
作者：
BEWLAY, BP;LIPSITT, HA;SUTLIFF, JA
本文阐述了高温共晶合金的凝固工艺在高温结构材料发展中的作用。特别强调了利用冷坩埚提拉法生长共晶基合金的定向凝固。利用该技术对熔化温度高达2250℃的合金进行定向凝固，以研究其微观结构、相平衡和力学性能。比较了提拉法和其他高温合金凝固方法的特点和局限性。给出了Nb-Si和Cr-Nb合金系定向凝固原位复合材料的显微组织和断裂韧性数据。讨论了高温材料定向凝固可实现的性能增强。
This paper describes the role of solidification processing of high-temperature eutectic alloys in the development of high-temperature structural materials. Particular emphasis is placed on directional solidification of eutectic-based alloys using cold crucible Czochralski crystal growth. Alloys with melting temperatures up to 2250 degrees C were directionally solidified by this technique for study of the microstructure, phase equilibria and mechanical properties. The attributes and limitations of the Czochralski technique are compared with those of other methods for solidification of high-temperature alloys. The microstructures and fracture toughness data of directionally solidified in situ composites generated from Nb-Si and Cr-Nb alloy systems are presented. Property enhancements that can be achieved by directional solidification of high-temperature materials are discussed.