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SiC晶须添加量对Ti(C0.7,N0.3)基金属陶瓷组织和性能的影响
Effect of Si C Whisker Addition on Microstructure and Properties of Ti(C0.7,N0.3)-based Metalloceramics 在线阅读 下载PDF
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- DOI:
- 作者:
- 陈庚 方琴 张光明 王正云 孙文文 何跃斌 蔺虹宾
CHEN Geng;FANG Qin;ZHANG Guangming;WANG Zhengyun;SUN Wenwen;HE Yuebin;LIN Hongbin
- 作者单位:
- 四川工程职业技术学院四川省航空材料检测与模锻工艺技术工程实验室 西华大学材料科学与工程学院
Sichuan Laboratory of Aerial Material Testing and Die Forging Technology,Sichuan Engineering Technical College,Deyang 618000,China;School of Materials Science and Engineering,Xihua University,Chengdu 610039,China
- 关键词:
- 晶须 Ti(C0.7,N0.3)基金属陶瓷 强韧性
whisker Ti(C0.7,N0.3)-based metalceramics strength and toughness
- 摘要:
- 用粉末冶金法制备了Ti(C0.7,N0.3)基金属陶瓷复合材料。使用XRD、SEM、硬度计和万能试验机等研究了Si C晶须添加量对Ti(C0.7,N0.3)基金属陶瓷显微组织和力学性能的影响。结果表明,Ti(C0.7,N0.3)基金属陶瓷具有明显、完整的"芯-环"结构,与未添加晶须的基体组织相比,添加了晶须的金属陶瓷组织中出现了"白芯-灰壳"结构,晶粒更加细化;随着晶须含量增加,金属陶瓷硬度下降,而抗弯强度和断裂韧性先升后降。当晶须添加量为1.5%时,金属陶瓷在硬度略微下降的情况下强韧性获得了最大提升,抗弯强度、断裂韧性分别达到1 620 MPa、12.2 MPa·m1/2,较未添加晶须时分别提高了13.3%和16.1%。The Ti(C0.7,N0.3)-based cermet composite was fabricated by powder metallurgy.The effect of Si C whisker addition on the microstructure and properties of Ti(C0.7,N0.3)-based metalceramics was studied by using XRD,SEM,hardness tester and universal testing machine.The results show that the Ti(C0.7,N0.3)-based metalceramics has an obvious and complete'core-rim'structure,compared with the matrix structure without whiskers,a'white core-gray rim'structure added with whiskers appeared in the cermet structure,and the crystal grains are more refined.As the whisker content increased,the hardness of the cermet decreased,while the transverse rupture strength and fracture toughness showed a trend of rising first and then decreasing.When the addition amount of whiskers is 1.5%,the strength and toughness of the cermet has a largest improvement while the hardness has a slight drop.The transverse rupture strength and fracture toughness are respectively 1 620 MPa and 12.2 MPa·m1/2,which were 13.3%and 16.1%higher than those without whisker,respectively.