Phase selection of titanium boride in copper matrix composites during solidification

Yihui Jiang, Dan Li, Shuhua Liang, Juntao Zou, Feng Liu

科研成果: 期刊稿件文章同行评审

17 引用 (Scopus)

摘要

In situ TiB whisker and TiB2 particle hybrid reinforced copper matrix composites were fabricated by vacuum induction melting. The phase constitution of the composites varies with their chemical composition. Thermodynamic and kinetic assessments were used to analyze the phase selection of titanium borides during solidification. The precipitations of TiB whisker and TiB2 particle from Cu–Ti–B liquids are both thermodynamically favored, and the phase selection is thus controlled by the competition of nucleation and growth kinetics between the two titanium borides. For the case of the three liquids studied in this work, the nucleation conditions are satisfied except for the formation of TiB in Cu–2at.%Ti–4at.%B liquid. With the change of chemical composition, the growth rate is altered rapidly for TiB, but remains nearly unchanged for TiB2.

源语言英语
页(从-至)2957-2963
页数7
期刊Journal of Materials Science
52
5
DOI
出版状态已出版 - 1 3月 2017

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