Ti_3SiC_2/TiC复合材料的制备及力学性能研究（英文）  

Preparation and Mechanical Properties of Ti_3SiC_2/TiC Synthesized by Infiltration Sintering

作　　者：周峰 肖琪聃 吴珊 

机构地区：[1]信阳师范学院建筑与土木工程学院,信阳464000

出　　处：《科学技术与工程》2017年第25期274-278,共5页Science Technology and Engineering

基　　金：National joint fund (UI034003);Nanhu Scholars Program for Young Scholars of XYNU~~

摘　　要：弓网系统中,各种类型的受电弓滑板承担着传输电能的重要功能,其严酷的工作条件对受电弓滑板材料的性能提出了非常苛刻的要求。目前最主要的受电弓滑板有:粉末冶金滑板,纯碳滑板和浸金属碳滑板。其中碳滑板材料性能较好但价格昂贵,粉末冶金滑板材料价格便宜,但性能明显逊于前者。Ti_3SiC_2/Ti C是一种兼具陶瓷与金属性质的新型材料,与碳滑板材料相比,其电阻率低,且具有良好的抗氧化性和自润滑减摩性,因此Ti_3SiC_2/TiC将可能成为一种工艺简单、成本更低、而性能则更高的新型受电弓滑板材料。以Si、Ti和C为原料,利用熔渗反应烧结技术制备出Ti_3SiC_2/TiC复合材料,研究结果表明,制备样品的弯曲强度与硬度分别达到423~564 MPa和169~249 HB。同时,对Ti_3SiC_2/TiC复合材料的断裂机理进行了研究。The Ti_3SiC_2/Ti C composites with high density have been fabricated by infiltration sintering synthesis（ IS） with Si,Ti and C powders（ x Si∶ 3Ti∶ 2C） as the raw material. The crystal structure and composition of samples were determined respectively. The result showed that samples consists of double-phase： Ti C and Ti_3SiC_2.The Ti_3SiC_2/Ti C samples showed good mechanical performance-the flexural strength and the hardness were 423 ~564 MPa and 169 ~ 249 HB,respectively. The Brinell hardness of samples varies regularly as the content of titanium carbide in Ti_3SiC_2/Ti C composites and test loads change. The damage and fracture mechanisms were also studied in this paper.

关 键 词：Ti3SiC2/TiC 熔渗 力学性能 断裂机理 

分 类 号：TQ174[化学工程—陶瓷工业]