Microstructure and Properties of In-situ Synthesized Ti<sub>2</sub>AlC/TiAl Composites

Li Yunming; Wang Fen; Liu Ningyan; Zhu Jianfeng

Views : 0 下载量: 264 CSCD: 1

Export
Share
Collection
Album

Microstructure and Properties of In-situ Synthesized Ti₂AlC/TiAl Composites
Issue 2, Pages: 145-147(2008)
Published： 2008 ，
DOI：

扫描看全文

[1]李云明,王芬,刘宁艳,朱建锋.原位合成Ti_2AlC/TiAl复合材料的显微组织与性能[J].特种铸造及有色合金,2008(02):145-147+81.

Li Yunming, Wang Fen, Liu Ningyan, et al. Microstructure and Properties of In-situ Synthesized Ti₂AlC/TiAl Composites. [J]. Special Casting & Nonferrous Alloys (2):145-147(2008)
[1]李云明,王芬,刘宁艳,朱建锋.原位合成Ti_2AlC/TiAl复合材料的显微组织与性能[J].特种铸造及有色合金,2008(02):145-147+81. DOI：

Li Yunming, Wang Fen, Liu Ningyan, et al. Microstructure and Properties of In-situ Synthesized Ti₂AlC/TiAl Composites. [J]. Special Casting & Nonferrous Alloys (2):145-147(2008) DOI：

摘要

利用Al-Ti-C体系的放热反应

通过真空热压烧结

原位合成了Ti2AlC/TiAl复合材料。借助于XRD

SEM

OM分析及力学性能测试

分析了Ti2AlC/TiAl复合材料微观组织与性能的关系

探讨了Ti2AlC增强增韧TiAl金属间化合物的机制。结果表明

其增强相为Ti2AlC

并有微量的Ti3AlC生成

基体相为TiAl。Ti2AlC的生成

细化了晶粒

其层状结构阻止了裂纹扩展。力学性能测试表明

该材料抗弯强度可达743.84MPa

断裂韧度可达9.17MPa.m1/2。

Abstract

The microstructure and properties of in-situ Ti2AlC/TiAl composites synthesized by vacuum pressure sintering in Al-Ti-C system were investigated by XRD（X-ray diffractometer）

SEM（scanning electron microscope）

OM（optical microscope） and tensile test

and the reinforced mechanism of Ti2AlC in TiAl alloy was approached.The results indicate that the composites are composed of Ti2AlC reinforcement

a few amounts of Ti3AlC phase and TiAl matrix.The creation of lamellar Ti2AlC reinforcement can refine the matrix grain size and restrain the propagation of crack

greatly improving the mechanical properties of the composites.The bending strength and fracture toughness of the composites reach 743.84 MPa and 9.17 MPa·m1/2

respectively.