自增韧SiC-B4C-ZrB2复相陶瓷的制备及性能表征

doi:10.3969/j.issn.1001-1935.2025.03.007

耐火材料 ›› 2025, Vol. 59 ›› Issue (3): 217-223.DOI: 10.3969/j.issn.1001-1935.2025.03.007

自增韧SiC-B₄C-ZrB₂复相陶瓷的制备及性能表征

王雯龙^1,2), 刘凯²⁾, 王红杰²⁾, 陈刚^1,2), 田兆永²⁾, 谭波²⁾, 李俊莹²⁾

1)内蒙金属材料研究所山东烟台 264003
2)中国兵器科学研究院宁波分院浙江宁波 315000

收稿日期:2024-09-13 出版日期:2025-06-15 发布日期:2025-06-16
作者简介:王雯龙:男,1998年生,硕士,研究实习员。E-mail:wwl20120933@163.com。
基金资助:
宁波市2025重大科技攻关项目(2022Z008)。

Fabrication and property characterization of self-toughened SiC-B₄C-ZrB₂ multiphase ceramics

Wang Wenlong, Liu Kai, Wang Hongjie, Chen Gang, Tian Zhaoyong, Tan Bo, Li Junying

First author’s address:52 Institute of China North Industries Group,Yantai 264003,Shandong,China

Received:2024-09-13 Online:2025-06-15 Published:2025-06-16

摘要/Abstract

摘要： 为了制备具有优异力学性能的自增韧SiC-B₄C-ZrB₂复相陶瓷,以SiC、B₄C、ZrO₂和石墨碳微粉为原料,通过无压固相烧结经2 200 ℃保温2 h制备SiC-B₄C-ZrB₂复相陶瓷,研究了不同ZrO₂加入量(加入质量分数分别为0、5.60%、10.90%、15.93%、20.69%和25.25%)对复相陶瓷显微结构和力学性能的影响。结果表明:1)ZrO₂的添加有助于烧结致密化,并促进SiC晶粒异向生长,形成了独特的多模态晶粒互锁显微结构,显著提升材料的损伤容限。2)随着ZrO₂加入量的增加,试样相对密度、弯曲强度和硬度呈现先增加后减小的趋势,当ZrO₂加入量为10.90%(w)时,相对密度最高,可达98.23%,维氏硬度和弯曲强度达到峰值,分别为29.7 GPa和443 MPa。此外,ZrO₂加入量为15.93%(w)时,试样展现出最高的断裂韧性,可达6.43 MPa·m^1/2。

关键词: 无压烧结, 复相陶瓷, 显微结构, 力学性能

Abstract: To develop self-toughened SiC-B₄C-ZrB₂ multiphase ceramics with superior mechanical properties,specimens were fabricated via pressureless solid-state sintering at 2 200 ℃ for 2 h using SiC,B₄C,ZrO₂,and graphite micropowder as raw materials.The effects of ZrO₂ additions (0,5.60%,10.90%,15.93%,20.69%,and 25.25%,by mass) on the microstructure and mechanical properties of the ceramics were investigated.Key findings include:(1)the addition of ZrO₂ is conducive to sintering densification and the anisotropic growth of SiC grains,forming a unique multimodal grain interlocking microstructure,which significantly improves the damage tolerance of the material;(2)with the increase of ZrO₂ addition,the relative density,flexural strength and hardness of the samples show a trend of first increasing and then decreasing;when the ZrO₂ addition is 10.90%,the relative density is the highest,up to 98.23%,and the Vickers hardness and flexural strength reach the peaks,29.7 GPa and 443 MPa,respectively;in addition,when the ZrO₂ addition is 15.93%,the sample shows the highest fracture toughness of 6.43 MPa·m^1/2.

Key words: pressureless sintering, multiphase ceramics, microstructure, mechanical properties

中图分类号:

TQ174

王雯龙, 刘凯, 王红杰, 陈刚, 田兆永, 谭波, 李俊莹. 自增韧SiC-B₄C-ZrB₂复相陶瓷的制备及性能表征[J]. 耐火材料, 2025, 59(3): 217-223.

Wang Wenlong, Liu Kai, Wang Hongjie, Chen Gang, Tian Zhaoyong, Tan Bo, Li Junying. Fabrication and property characterization of self-toughened SiC-B₄C-ZrB₂ multiphase ceramics[J]. Refractories, 2025, 59(3): 217-223.

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自增韧SiC-B₄C-ZrB₂复相陶瓷的制备及性能表征

Fabrication and property characterization of self-toughened SiC-B₄C-ZrB₂ multiphase ceramics

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