烧结
熔盐
材料科学
陶瓷
惰性气体
氧化物
惰性
化学工程
氮化物
冶金
碳化物
化学
复合材料
有机化学
工程类
图层(电子)
作者
Apurv Dash,Robert Vaßen,Olivier Guillon,Jesús González‐Julián
出处
期刊:Nature Materials
[Springer Nature]
日期:2019-04-01
卷期号:18 (5): 465-470
被引量:137
标识
DOI:10.1038/s41563-019-0328-1
摘要
To prevent spontaneous oxidation during the high-temperature synthesis of non-oxide ceramics, an inert atmosphere is conventionally required1,2. This, however, results in high energy demand and high production costs. Here, we present a process for the synthesis and consolidation of oxidation-prone materials, the 'molten salt shielded synthesis/sintering' process (MS3), which uses molten salts as a reaction medium and also to protect the ceramic powders from oxidation during high-temperature processing in air. Synthesis temperatures are also reduced, and the final product is a highly pure, fine and loose powder that does not require additional milling steps. MS3 has been used for the synthesis of different ternary transition metal compounds (MAX phases, such as Ti3SiC23, Ti2AlN4, MoAlB5), binary carbides (TiC) and for the sintering of titanium. The availability of high-quality powders, combined with energy and cost savings, may remove one of the bottlenecks for the industrial application of these materials.
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