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Ti3AlC2掺杂SPS法制备Ti2AlC/TiAl复合材料的研究
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陕西理工学院 材料科学与工程学院,陕西理工学院 材料科学与工程学院,陕西理工学院 材料科学与工程学院,陕西理工学院 材料科学与工程学院,陕西理工学院 材料科学与工程学院,陕西理工学院 材料科学与工程学院,陕西理工学院 材料科学与工程学院,陕西理工学院 材料科学与工程学院

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国家自然科学基金青年科学基金(项目号51201094);陕西省青年科技新星科技计划项目(项目号2014KJXX-75)


Study on Ti2AlC/TiAl composites with doping Ti3AlC2 by SPS
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    摘要:

    通过2TiC-Ti-1.2Al体系的原位热压反应制备了Ti3AlC2陶瓷,然后以59.2Ti-30.8Al-10Ti3AlC2(wt%)为反应体系,采用放电等离子烧结技术制备出Ti2AlC/TiAl基复合材料。借助XRD、SEM分析了产物的相组成和微观结构,并测量了其室温力学性能。结果表明:原位热压烧结产物由Ti3AlC2和TiC相组成,Ti3AlC2呈典型的层状结构,TiC颗粒分布在其间。SPS法制备的Ti2AlC/TiAl基复合材料主要由TiAl、Ti3Al和Ti2AlC相组成,Ti2AlC增强相主要分布于基体晶界处,表现为晶界/晶内强化作用。力学性能测试表明:Ti2AlC/TiAl基复合材料的密度、维氏硬度、断裂韧性和抗弯强度分别为3.85 g/cm3、5.37 GPa、7.17 MPa?m1/2和494.85 MPa。

    Abstract:

    Ti3AlC2 ceramics were fabricated by in-situ reaction in the 2TiC-Ti-1.2Al system. Ti2AlC/TiAl composites were prepared by spark plasma sintering technology in the 59.2Ti-30.8Al-10Ti3AlC2(wt%) system. The phase composition and microstructure of the specimens were analyzed by XRD and SEM methods. The room temperature mechanical properties were also measured. The results revealed that the in-situ Ti3AlC2 materials mainly consisted of Ti3AlC2 and TiC phases. Ti3AlC2 ceramics present layered structure and TiC particles distribute around the grain boundaries. The Ti2AlC/TiAl composites prepared by SPS mainly consist of TiAl, Ti3Al and Ti2AlC phases. Ti2AlC reinforcements are mainly distributed in the matrix grain boundaries, which show grain-boundary strengthening or intracrystalline strengthening effect. The density, Vickers hardness, fracture toughness and flexural strength of the Ti2AlC/TiAl composites are 3.85 g/cm3, 5.37 GPa, 7.17 MPa, 7.17 MPa?m1/2 and 494.85 MPa respectively.

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艾桃桃,王维,于琦,李文虎,蒋鹏,袁新强,孛海娃,费岩晗. Ti3AlC2掺杂SPS法制备Ti2AlC/TiAl复合材料的研究[J].稀有金属材料与工程,2017,46(S1):1~4.[Ai Taotao, Wang Wei, Yu Qi, Li Wenhu, Jiang Peng, Yuan Xinqiang, Bo Haiwa, Fei Yanhan. Study on Ti2AlC/TiAl composites with doping Ti3AlC2 by SPS[J]. Rare Metal Materials and Engineering,2017,46(S1):1~4.]
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  • 收稿日期:2016-05-11
  • 最后修改日期:2016-05-11
  • 录用日期:2017-08-08
  • 在线发布日期: 2017-12-13
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