Preparation of Fe2AlB2 material via thermal explosion induced by spark plasma sintering

放电等离子烧结 材料科学 原材料 微观结构 维氏硬度试验 烧结 杂质 冶金 复合材料 化学 有机化学
作者
Yanli Zhang,Qi Zhang,Zhen Dai,Dandan Zhu,Baoyan Liang,Wangxi Zhang,Ying Liu,Ruijie Zhang,Jizhou Zhang,Xiaochen Feng,Li Yang
出处
期刊:Journal of Asian Ceramic Societies [Taylor & Francis]
卷期号:10 (1): 262-269 被引量:5
标识
DOI:10.1080/21870764.2022.2040111
摘要

Fe2AlB2 material was prepared through spark plasma sintering (SPS) by using Fe/Al/B mixed powder as the raw material. The effects of sintering temperature, holding time, and Al content on the phase composition and microstructure of the product were studied to obtain materials with high Fe2AlB2 content. Results showed that when the sintering temperature was increased to approximately 1000°C, SPS induced a thermal explosion reaction, resulting in the formation of a dense sintered sample with high Fe2AlB2 content. The sample contained a small amount of FeB and FeAl3 impurities. The synthesis of Fe2AlB2 could be promoted by optimizing holding time and increasing Al content in the raw materials. The most suitable process parameters for the synthesis of materials with high Fe2AlB2 content were 1000°C, no holding, and 2Fe/1.1Al/2B raw material. The Fe2AlB2 sample had good mechanical properties. Its Vickers hardness and bending strength were 10.5 GPa and 352 MPa, respectively. Given that the synthesized Fe2AlB2 material was unstable, continuously increasing the temperature or extending the holding time would cause it to decompose.
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