| SPS烧结制备TiB2/TiC复合材料 |
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| 引用本文： | 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(9):961-964. |
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| 作者姓名： | 马志强 纪引虎 王连军 |
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| 作者单位： | 东华大学纤维材料改性国家重点实验室;中航工业西安飞行自动控制研究所 |
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| 基金项目： | 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~~ |
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| 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1μm,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.
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| 关 键 词： | 原位反应烧结 复合材料 MSP强度 两步法烧结 |
Fabrication of TiB2/TiC Composites by Spark Plasma Sintering |
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| MA Zhi-Qiang,JI Ying-Hu,WANG Lian-Jun.Fabrication of TiB2/TiC Composites by Spark Plasma Sintering[J].Journal of Inorganic Materials,2012(9):961-964. |
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| Authors: | MA Zhi-Qiang JI Ying-Hu WANG Lian-Jun |
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| Affiliation: | 1(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) |
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| 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. |
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| Keywords: | in situ reactive sintering composite MSP Strength two-step sintereing |
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