The Effect of Ti Addition on the Microstructure and Fracture Toughness of Bn-Al Composite Materials Synthesized by Vacuum Infiltration

Archives of Metallurgy and Materials

Ch. Gongjin¹  Y. He¹  C. Xiaozhou¹  X. Xiangxin¹  W. Chao¹ 

[1] School of Materials and Metallurgy, Northeastern University, Liaoning Key Lab for Cologically Comprehensive Utilization of Boron Resource and Materials, Engineering and Technology Research Center for Boron Resource Comprehensive Development and Application of Liaoning Province, Shenyang 110004, China

关键词: Keywords : BN-Al;    Ti;    Ceramic composites;    Microstructure;    Fracture toughness;   

DOI  :  10.2478/amm-2013-0028

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

In this paper, we studied the effect of Ti addition on the microstructure and fracture toughness of Boron nitride- Aluminum (BN-Al) composite materials that were synthesized by vacuum infiltration. The BN-Al composite materials were fabricated by preheating the [Ti+BN] preforms at 1700º for 1 hour before Al alloys were infiltrated into the preforms in a vacuum atmosphere at 1100º for 2 hours. X-ray diffraction (XRD) patterns showed that the diffraction peaks of titanium diboride (TiB2) appeared when the [Ti+BN] preforms were preheated. It is thought that metal Al protected are visible and this could be achieved by the generation of TiB2 when Al infiltrated into the preform from fractography. The matching fracture toughness of the [Ti+BN] preforms gradually improve when Ti content was increased.

【 授权许可】

Unknown