摘要
为了提高2024Al基复合材料的强度和塑性,通过球磨和放电等离子烧结技术(SPS)制备了TiB_(2)-C_(f)(Ni)/2024Al复合材料。使用SEM对所制备材料的微观组织进行表征;使用XRD对材料的物相组成进行表征;使用维氏硬度计对复合材料的硬度进行测试;使用拉伸试验机对所制备材料的拉伸力学性能进行测试,并且通过拉伸断口的SEM形貌分析了所制备材料的断裂机理。结果表明:在TiB_(2)-C_(f)(Ni)/2024Al中,碳纤维和TiB_(2)均匀分布在铝基体中,其析出相Al_(2)Cu、Al_(2)CuMg的尺寸比2024Al、TiB_(2)/2024Al、C_(f)(Ni)/2024Al析出相的尺寸更加细小。TiB_(2)-C_(f)(Ni)/2024Al的硬度达到115.8 HV,抗拉强度为345.0 MPa,断裂伸长率为8.5%,相比于2024Al的分别提高27.5%、33.9%和129.7%。
TiB_(2)-C_(f)(Ni)/2024Al was prepared by spark plasma sintering technology in order to improve the strength and plasticity of 2024Al matrix composites.The microstructure of all the prepared composites were analyzed by SEM,the phase composition was characterized by XRD,the hardness was tested by Vickers hardness tester,the tensile mechanical properties were tested by tensile testing machine,the fracture mechanism of the prepared material was analyzed by the SEM morphology of the tensile fracture.The results show that the carbon fiber and TiB_(2) particle of TiB_(2)-C_(f)(Ni)/2024Al are uniformly distributed in the 2024Al matrix whose precipitates are composed of fine Al_(2)Cu,Al_(2)CuMg,etc.The hardness of TiB_(2)-C_(f)(Ni)/2024Al is 115.8 HV,the tensile strength is 345.0 MPa,and the fracture elongation rate is 8.5%,which show 27.5%,33.9%and 129.7%higher than that of 2024Al,respectively.
作者
路向前
高义民
周璇
鲁宁斌
汪勇
刘庆坤
李烨飞
LU Xiangqian;GAO Yimin;ZHOU Xuan;LU Ningbin;WANG Yong;LIU Qingkun;LI Yefei(State Key Laboratory for Mechanical Behavior of Materials,Xi'an Jiaotong University,Xi'an 710049,China;CSIC No.12 Research Institute,Xingping 713102,China;Shandong Huifeng Foundry Technology Co.,Ltd.,Ji'nan 250204,China)
出处
《热加工工艺》
北大核心
2023年第4期68-72,共5页
Hot Working Technology
基金
国家重点研发计划资助项目(2021YFB3701204)
广东省重点领域研发计划资助项目(2019B010942001)
陕西省自然科学基础研究计划资助项目(2022JQ-532,2021JM-011)。
