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首页 > 过刊浏览>2020年第49卷第2期 >550-554. DOI:10.12442/j.issn.1002-185X.QH20190029
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SPS反应烧结HfB2复合材料的工艺和性能研究
作者:
作者单位:

1.郑州大学 材料科学与工程学院;2.郑州航空工业管理学院

基金项目:

国家自然科学基金(51772275)；河南省高校科技创新人才(15HASTIT009)；中国博士后科学基金(2016T90677和2014M561997)


Preparation and Properties of HfB2-ZrSi2-SiC Composites Fabricated by Reactive Spark Plasma Sintering
Author:
Affiliation:

1.School of Materials Science and Engineering,Zhengzhou University;2.Zhengzhou University of Aeronautics

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    摘要:

    本文针对HfB2陶瓷材料难烧结和韧性差等问题,选择ZrC粉、Si粉和C粉为烧结助剂,借助ZrC-Si-C间的原位反应生成ZrSi2和SiC,促进HfB2陶瓷的烧结,并提高HfB2陶瓷的综合力学性能。HfB2与烧结助剂的混合粉体经放电等离子烧结(SPS)在1600 ℃保温10 min和40 MPa的压力条件下制备出相对密度为96.61%的HfB2-ZrSi2-SiC复合材料,所制样品的硬度、抗弯强度和断裂韧性均随着烧结助剂ZrC-Si-C含量的增加呈现先上升后降低的趋势。当ZrC-Si-C添加量为10 wt.%时所制备样品的综合力学性能最好,其硬度值为26.80±1.2 GPa、抗弯强度为504±40 MPa、断裂韧性值为4.66±0.21 MPa.m1/2。

    Abstract:

    ZrC, Si and C powders were used as the sintering aids to enhance the densification and the mechanical properties of HfB2, due to the in-situ reaction between ZrC-Si-C at sintering temperature. Dense HfB2-ZrSi2-SiC ceramic composites have been fabricated by reactive spark plasma sintering at 1600 ℃ for 10 min under a pressure of 40 MPa. With the amount of ZrC-Si-C increasing, the Vickers hardness, the flexural strength and fracture toughness of the sintered samples increased first, then decreased. HfB2-10wt.% ZrC-Si-C composites showed the the best comprehensive mechanical properties. The Vickers hardness, flexural strength and fracture toughness of HfB2-10wt.% ZrC-Si-C composites were 26.80±1.2 GPa, 504±40 MPa and 4.66±0.21 MPa.m1/2, respectively.

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马世晨,赵笑统,邵刚,王海龙,许红亮,卢红霞,范冰冰,张锐. SPS反应烧结HfB2复合材料的工艺和性能研究[J].稀有金属材料与工程,2020,49(2):550~554.[Shichen Ma, Xiaotong Zhao, Gang Shao, Hailong Wang, Hongliang Xu, Hongxia Lu, Bingbing Fan, Rui Zhang. Preparation and Properties of HfB2-ZrSi2-SiC Composites Fabricated by Reactive Spark Plasma Sintering[J]. Rare Metal Materials and Engineering,2020,49(2):550~554.]
DOI：10.12442/j. issn.1002-185X. QH20190029

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  • 收稿日期:2019-03-15
  • 最后修改日期:2019-03-15
  • 录用日期:2019-04-19
  • 在线发布日期: 2020-03-12

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