SPS烧结制备TiB2/TiC复合材料

doi:10.3724/SP.J.1077.2012.11672

无机材料学报 ›› 2012, Vol. 27 ›› Issue (9): 961-964.DOI: 10.3724/SP.J.1077.2012.11672

SPS烧结制备TiB₂/TiC复合材料

马志强¹, 纪引虎², 王连军¹

(1. 东华大学纤维材料改性国家重点实验室, 上海201620; 2. 中航工业西安飞行自动控制研究所, 西安 716005)

收稿日期:2011-10-27 修回日期:2011-12-12 出版日期:2012-09-20 网络出版日期:2012-08-28
作者简介:马志强(1986-), 男, 硕士研究生. E-mail: mazhiqiang0501@126.com
基金资助:
上海市重点学科建设项目(B603); 惯性技术航空科技重点实验室航空科学基金(201108M2001); 教育部新世纪优秀人才支持计划(NCET-10-0323); 上海市曙光计划(11SG34); 中央高校基本科研业务专项基金

Fabrication of TiB₂/TiC Composites by Spark Plasma Sintering

MA Zhi-Qiang¹, JI Ying-Hu², WANG Lian-Jun¹

(1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, China; 2. AVIC, Xi’an Flight Automatic Control Research Institute, Xi’an 716005, China)

Received:2011-10-27 Revised:2011-12-12 Published:2012-09-20 Online:2012-08-28
About author:MA Zhi-Qiang. E-mail: mazhiqiang0501@126.com
Supported by:
Shanghai Leading Academic Discipline Project (B603); Aeronautical Science Foundation of Aviation Key Laboratory of Science and Technology on Inertia (201108M2001); Program for New Century Excellent Talents in University (NCET-10-0323); “Shu Guang” project supported by Shanghai Municipal Education Commission and Shanghai Education Development Foundation (11SG34); The Fundamental Research Funds for the Central Universities

摘要/Abstract

摘要： 采用金属钛粉和碳化硼为初始粉料, 利用SPS放电等离子烧结技术制备了致密的纳米结构TiB₂/TiC复合材料. 并借助XRD、SEM考察了复合材料的相组成和显微结构, 利用压痕法和小样品力学性能测试方法(MSP)测定了室温显微硬度、断裂韧性和MSP强度. 研究结果表明: 利用一步法直接升温至1550℃并保温6 min制备的复合材料, 其晶粒尺寸大于1 μm, MSP强度为833 MPa. 而采用两步法升温至1550℃, 然后迅速降低保温温度至1450℃, 并保温6 min条件下使金属钛粉和碳化硼同步完成反应、烧结、致密化, 生成晶粒细小的TiB₂/TiC复合材料, 晶粒尺寸大约为200 nm, 并且所制备的复合材料力学性能更好, MSP强度达到1095 MPa.

关键词: 原位反应烧结, 复合材料, MSP强度, 两步法烧结

Abstract: TiB₂/TiC composites were in situ fabricated through spark plasma sintering (SPS) technique using Ti and B₄C powders as starting materials. The phase constituent of the samples was analyzed by X-ray diffraction techniques and microstructures were observed by scanning electron microscope. The Vickers hardness, fracture toughness and MSP strength at room temperature was measured by indentation method and Modified Small Punch (MSP) test. The results showed that the TiB₂/TiC composite fabricated by one-step sintering (sintering at 1550℃ for 6 min) has an average grain size greater than 1 μm with MSP strength of 844 MPa. While the TiB₂/TiC composite with an average grain size of about 200 nm could be fabricated by two-step sintering (at higher sintering temperature of 1550℃ and lower holding temperature of 1450℃) and its MSP strength reached as high as 1095 MPa.

Key words: in situ reactive sintering, composite, MSP Strength, two-step sintereing

中图分类号:

TQ174

马志强, 纪引虎, 王连军. SPS烧结制备TiB₂/TiC复合材料[J]. 无机材料学报, 2012, 27(9): 961-964.

MA Zhi-Qiang, JI Ying-Hu, WANG Lian-Jun. Fabrication of TiB₂/TiC Composites by Spark Plasma Sintering[J]. Journal of Inorganic Materials, 2012, 27(9): 961-964.

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SPS烧结制备TiB₂/TiC复合材料

Fabrication of TiB₂/TiC Composites by Spark Plasma Sintering

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