Changes in the microstructural state of Ti-Al-Nb-based alloys depending on the temperature cycle during spark plasma sintering
Changes in the microstructural state of Ti-Al-Nb-based alloys depending on the temperature cycle during spark plasma sintering
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DOI：
10.1515/mt-2020-0017
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发表时间：
2021-01-01
影响因子：
2.5
通讯作者：
Wieleba, Wojciech
中科院分区：
文献类型：
--
作者：
Kozhakhmetov, Yernat;Skakov, Mazhyn;Wieleba, Wojciech
本文介绍了Ti-12.52Al-43.08Nb系合金（wt.-%）的结构相态与放电等离子烧结温度关系的研究结果。已经确定，在1500℃下火花等离子烧结Ti-Al-Nb合金会导致混合物中的铝成分熔化，从而对成品质量产生负面影响。当烧结温度从1000℃提高到1300℃时，由于o相从b2相和ti3al相中快速析出，o相的体积分数提高到49.63%。结果表明，在1300℃下制备的金属间复合材料以B2+O两相结构为主，更适合于增强Ti-Al-Nb基储氢材料的吸附性能。
This article presents results of the study on the dependence of the structural-phase state of alloys based on Ti-12.52Al-43.08Nb system (wt.-%) on the temperature of spark plasma sintering. It has been established that spark plasma sintering of Ti-Al-Nb alloys under the temperature of 1500 degrees C resulted in melting the aluminum component of the mixture that, in turn, negatively affects the quality of ready products. It has also been shown that stepping up the sintering temperature from 1000 degrees C to 1300 degrees C leads to increasing volume fraction of O-phase up to 49.63 % due to rapid precipitation of O-phase from B2-phase and Ti3Al-phase. It has been revealed that intermetallic composites obtained under the temperature of 1300 degrees C are characterized by a dominant two-phase B2+O structure which is more suitable for strengthening sorption properties of hydrogen-storing materials based on Ti-Al-Nb.