烧结温度对(Al_3Ti+Al_3Zr)增强铝基复合材料组织和性能的影响
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摘要
采用粉末冶金原位合成法制备Al_3Ti、Al_3Zr金属间化合物增强铝基复合材料。采用X射线衍射、扫描电镜、光学显微镜、硬度测试和抗拉强度测试,研究烧结温度对复合材料显微组织和力学性能的影响。结果表明,在铝基体中生成了金属间化合物Al_3Ti和Al_3Zr增强相;随烧结温度从700℃上升到900℃,复合材料的硬度(HV)从85.7提高到118.1;经800℃烧结制备的复合材料表现出了较好的抗拉强度(140.71MPa)和屈服强度(40.5MPa)。
In-situ formed Al_3Ti and Al_3Zr intermetallic compound reinforced Al matrix composites were fabricated through powder metallurgy method.The effects of sintering temperature on the microstructure and mechanical properties of the composites were investigated by X-ray diffraction,scanning electron microscope,optical microscopy,hardness and tensile strength testing.The results reveal that Al_3Ti and Al_3Zr intermetallic compounds enhanced phases are generated in the aluminum matrix.The Vickers hardness of the composites are increased from85.7 HV to 118.1 HV with the sintering temperature increased from 700 ℃to 900 ℃.The composites prepared by sintering at 800℃ present the acceptable tensile strength of 140.71 MPa and yield strength of 40.5 MPa.
In-situ formed Al_3Ti and Al_3Zr intermetallic compound reinforced Al matrix composites were fabricated through powder metallurgy method.The effects of sintering temperature on the microstructure and mechanical properties of the composites were investigated by X-ray diffraction,scanning electron microscope,optical microscopy,hardness and tensile strength testing.The results reveal that Al_3Ti and Al_3Zr intermetallic compounds enhanced phases are generated in the aluminum matrix.The Vickers hardness of the composites are increased from85.7 HV to 118.1 HV with the sintering temperature increased from 700 ℃to 900 ℃.The composites prepared by sintering at 800℃ present the acceptable tensile strength of 140.71 MPa and yield strength of 40.5 MPa.
引文
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[3]高红霞,杨东,王秀红,等.双尺度Al2O3颗粒增强铝基复合材料的组织和性能[J].特种铸造及有色合金,2014,34(4):423-426.
[4]卢德宏.顾明元,施忠良,等.SiC和Gr颗粒混杂增强Al基复合材料的摩擦磨损特性的研究[J].复合材料学报,2000(1):60-64.
[5]李先雨,王伟国,郝刚领,等.新型超轻高强球形孔Ti-Al的制备及其力学性能研究[J].有色金属,2017,7(5):20-24.
[6]惠林海,耿浩然,王守仁,等.Al3Ti金属间化合物的研究进展[J].机械工程材料,2007(9):1-6.
[7]介万奇,KANDALOVA E G,张瑞杰,et al.SHS法制备Al3Ti/Al复合材料的研究[J].稀有金属材料与工程,2000(3):145-148.
[8]YANG Z R,WANG S Q,GAO M J.A new-developed magnesium matrix composite by reactive sintering[J].Composites,2008,A39:1 427-1 432.
[9]石益海,赵玉厚.原位生成Al3Zr和ZrB2增强铝基复合材料研究[J].热加工工艺,2008,37(4):20-22.
[10]阮海光,黄福祥,钟明君,等.Al-Zr系金属间化合物的第一性原理研究[J].重庆理工大学学报(自然科学版),2017,31(5):60-67.
[11]姜慧丽,陈送义,陈康华,等.Zr质量分数对7003铝合金组织与腐蚀性能的影响[J].中南大学学报(自然科学版),2017,48(10):2 614-2 621.
[12]杨守杰,杨霞.高强度铝合金的研究进展[J].粉末冶金工业,2010,20(5):47-52.
[13]王衍行,林均品,贺跃辉,等.元素粉末Ti与Al反应机理的研究进展[J].材料导报,2007(1):83-85.
[14]刘子利,费飞,刘希琴,等.粉末冶金Mg-6Al-xZr合金的组织与力学性能[J].粉末冶金技术,2012,30(6):440-445.
[15]束德林.工程材料力学性能,第3版[M].北京:机械工业出版社,2016.