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B4C-TiB2复相陶瓷的强韧化研究
引用本文:唐军,谭寿洪,陈忠明,江东亮.B4C-TiB2复相陶瓷的强韧化研究[J].无机材料学报,1997,12(2):169-174.
作者姓名:唐军  谭寿洪  陈忠明  江东亮
作者单位:中国科学院上海硅酸盐研究所!上海,200050,中国科学院上海硅酸盐研究所!上海,200050,中国科学院上海硅酸盐研究所!上海,200050,中国科学院上海硅酸盐研究所!上海,200050
摘    要:采用热压烧结工艺,制备B4C-TiB2复相陶瓷。结果表明,复相陶瓷的抗弯强度,断裂韧性和显向硬度受第二相TiB2颗粒的影响,其中B4C-30vol%TiB2材料的弯曲强度为725MPa,比单体B4C提高65%,B4C-45vol^TiB2材料的断裂韧性为6.7MPa.m^1/2,比单体B4C提高84%,由B4C基体和TiB2颗粒热膨胀系数不匹配导致的残余应国是B4C-Tdisplay status

关 键 词:增韧  裂纹偏转  复合陶瓷  陶瓷  碳化硼  硼化钛
收稿时间:1996-1-3
修稿时间:1996-4-18

Strengthening and Toughening of B4C-TiB2 Multiphase Ceramics
TANG Jun,TAN Shouhong,CHEN Zhongming,JIANG Dongliang.Strengthening and Toughening of B4C-TiB2 Multiphase Ceramics[J].Journal of Inorganic Materials,1997,12(2):169-174.
Authors:TANG Jun  TAN Shouhong  CHEN Zhongming  JIANG Dongliang
Affiliation:ShanghaiInstituteofCeramics;ChineseAcademyofSciencesShanghai200050China
Abstract:B4C-TiB2 composites were prepared by hot-pressing process at 2050°C. The effects of TiB2 particlecontent on the fracture toughness, bending strength and Vickers hardness of B4C-TiB2 composites werestudied. The addition of 3Ovol% TiB2 raised the bending strength of B4C to the peak value of 725MPa, 65%higher than monolithic B4C. An 84% increase of composite toughness up to 6.7MP.m1/2 was discoveredupon the incorporation of 45vol% TiB2 particles into B4C matrix. The crack deflection caused by theresidual stress resulting from the difference in thermal expansion coefficient between B4C and TiB2 is the main mechanism responsible for the increase of toughness.
Keywords:B_4C  TiB_2  strengthening and toughening  crack deflection  
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