| Ti_3SiC_2材料的力学性能及抗损伤机制 |
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| 引用本文： | 王超,吕振林,张姗姗,周永欣. Ti_3SiC_2材料的力学性能及抗损伤机制[J]. 机械工程材料, 2009, 33(1) |
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| 作者姓名： | 王超 吕振林 张姗姗 周永欣 |
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| 作者单位： | 西安理工大学陕西省电工材料及熔渗技术重点实验室,陕西西安,710048 |
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| 摘 要： | 利用反应烧结技术得到了纯度为93.0%的Ti3SiC2块体材料;测试了该材料的断裂强度和硬度;用XRD、SEM等方法分析了材料的物相组成、断口形貌和损伤机制;用TG/DTA法分析了气孔产生的原因.结果表明:1 250℃烧结Ti3SiC2材料的抗弯强度为105.59 MPa,硬度为101 HB;其强度随Ti3SiC2含量的增加而增大;材料的抗损伤机制是通过晶粒破碎、穿晶断裂、分层、拔出等形式来消耗能量,从而阻止了裂纹的扩展,表现出了一定的微塑性.
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| 关 键 词： | 反应烧结 力学性能 抗损伤机制 |
Mechanical Properties and Damage Mechanism of Ti_3SiC_2 Ceramics |
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| WANG Chao,LU Zhen-lin,ZHANG Shan-shan,ZHOU Yong-xin. Mechanical Properties and Damage Mechanism of Ti_3SiC_2 Ceramics[J]. Materials For Mechanical Engineering, 2009, 33(1) |
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| Authors: | WANG Chao LU Zhen-lin ZHANG Shan-shan ZHOU Yong-xin |
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| Affiliation: | Xi'an University of Technology;Xi'an 710048;China |
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| Abstract: | Ti3SiC2 ceramics with purity of 93% were prepared by reaction sintering technology.The hardness and flexural strength of the sintered ceramics were tested.The phase compositions,fracture surfaces and damage mechanism were analyzed by X-ray diffraction(XRD) and scanning electron microscopy(SEM).The cause for porosity formation was analyzed by differential thermal analysis(DTA) and thermogravimetric analysis(TG).The results show that the hardness and flexural strength of the Ti3SiC2 ceramics were up to 101 HB... |
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| Keywords: | Ti3SiC2 |
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