Effects of Cr and Al Contents on the Preparation of SiC Fiber-Reinforced NiCrAl Alloy Matrix Composite
来源期刊：Acta Metallurgica Sinica2020年第10期
论文作者：Haoqiang Zhang Xixi Niu Zhiliang Pei Nanlin Shi Jun Gong Chao Sun
文章页码：1416 - 1422
摘 要：In this work, the effects of Cr and Al contents on the preparation of SiC fiber-reinforced NiCrAl alloy matrix composites（SiCf/Ni–20 Cr–5 Al, SiCf/Ni–15 Cr–5 Al, SiCf/Ni–10 Cr–5 Al and SiCf/Ni–10 Cr–3 Al） were thoroughly discussed. The composites were prepared by vacuum hot pressing process using matrix-coated fibers. It was found that Cr solute atoms played a significant role in retarding the recrystallization of NiCrAl alloy matrix, and the Al elements in the form of γ′-Ni3 Al phase had a suppression effect on the plastic flow of the matrix. Therefore, the reduction in Cr and Al contents was conductive to the recrystallization and plastic flow of NiCrAl alloy matrix, thereby reduced the size and number of micro-voids in the composite. In addition, this work provides some guidance for designing and manufacturing reasonable SiC fiber-reinforced Ni alloy matrix composites.
Haoqiang Zhang1,2，Xixi Niu1,3，Zhiliang Pei1，Nanlin Shi1，Jun Gong1，Chao Sun1
1. Institute of Metal Research,Chinese Academy of Sciences2. School of Materials Science and Engineering,University of Science and Technology of China3. University of Chinese Academy of Sciences
摘 要：In this work, the effects of Cr and Al contents on the preparation of SiC fiber-reinforced NiCrAl alloy matrix composites（SiCf/Ni–20 Cr–5 Al, SiCf/Ni–15 Cr–5 Al, SiCf/Ni–10 Cr–5 Al and SiCf/Ni–10 Cr–3 Al） were thoroughly discussed. The composites were prepared by vacuum hot pressing process using matrix-coated fibers. It was found that Cr solute atoms played a significant role in retarding the recrystallization of NiCrAl alloy matrix, and the Al elements in the form of γ′-Ni3 Al phase had a suppression effect on the plastic flow of the matrix. Therefore, the reduction in Cr and Al contents was conductive to the recrystallization and plastic flow of NiCrAl alloy matrix, thereby reduced the size and number of micro-voids in the composite. In addition, this work provides some guidance for designing and manufacturing reasonable SiC fiber-reinforced Ni alloy matrix composites.
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