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放电等离子烧结制备对Ni/SiCf界面反应的影响
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作者单位:

北京科技大学 材料科学与工程学院

基金项目:

高温结构材料重点实验开放基金和中央高校基本科研业务费资助(项目号FRF-TP-19-038A2)


Influence of Spark Plasma Sintering Preparation Reaction of Ni/SiCf System
Author:
Affiliation:

School of Materials Science and Engineering,University of Science and Technology Beijing

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    摘要:

    SiCf增强镍基复合材料作为一种高强度轻量化的新型高温材料设计,受到材料前沿的关注。然而剧烈的界面反应阻碍了该材料的进一步发展。由于长时制备下界面反应剧烈,因此本文采用具有短时快速制备成型特点的放电等离子烧结工艺制备并研究了Ni/SiCf复合体系。利用SEM,EDS等表征方法对Ni/SiCf复合体系的界面形貌及元素分布进行了分析。实验结果表明,Ni与SiCf发生反应生成Ni3Si和碳颗粒。反应区域进一步与Ni反应转变成Ni(Si,C)固溶体。Ni与SiCf及Ni与Ni3Si之间的强烈的反应热力学及动力学条件导致界面反应迅速发生。通过提升制备温度、延长制备时间会引起Ni3Si与碳颗粒进一步溶解,从而导致反应区域缩小,固溶体区域扩大。

    Abstract:

    As a new high-temperature material design with higher strength and lighter weight, researchers have paid attention to the SiCf reinforced nickel matrix composite. However, the severe interface reaction hinders the further development of this material. Since a long-time preparation could reduce the severe reaction, hence, in present work the Ni/SiCf composite system is prepared by spark plasma sintering which is characterized by shorter preparation time. SEM and EDS are used to analyze the interface morphology and element distribution. The results show that Ni reacts with SiCf and Ni3Si and carbon particles are formed. The reaction zone further reacts with Ni to generate Ni(Si,C) solid solution. There exist strong thermodynamic and kinetic conditions between Ni/SiCf system and Ni/Ni3Si system, which induce violent interface reaction. Raising sintering temperature and prolonging holding time could prompt Ni3Si and carbon particles to further dissolve. The dissolution process will shrink the reaction zone and expand the solid solution zone.

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王 法,江 河,董建新.放电等离子烧结制备对Ni/SiCf界面反应的影响[J].稀有金属材料与工程,2022,51(2):599~606.[Wang Fa, Jiang He, Dong Jianxin. Influence of Spark Plasma Sintering Preparation Reaction of Ni/SiCf System[J]. Rare Metal Materials and Engineering,2022,51(2):599~606.]
DOI:10.12442/j. issn.1002-185X.20210119

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  • 收稿日期:2021-02-07
  • 最后修改日期:2021-04-18
  • 录用日期:2021-05-12
  • 在线发布日期: 2022-03-09
  • 出版日期: 2022-02-28