SPS+热轧法制备的B_4C/Ti复合材料组织及力学性能的研究
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摘要
采用不同体积分数的碳化硼粉与钛粉通过放电等离子烧结(SPS)和轧制的方法制备钛基复合材料板材,并对所制备复合材料的密度、显微硬度、微观组织、物相、拉伸性能以及断口形貌等进行了系统研究。结果表明:随着碳化硼颗粒含量的提升,烧结态和轧制态复合材料的密度和显微硬度也相应上升。XRD分析显示,TiC与TiB在碳化硼颗粒与钛基体之间形成,3vol%B_4C的轧制态钛基复合材料的最大抗拉强度能够达到800 MPa,抗拉强度的提高是由于TiC与TiB的作用。断裂主要发生在B4C颗粒和B4C颗粒与基体的界面之间。
The titanium matrix composite plate was prepared by spark plasma sintering(SPS) and rolling with different volume fraction of boron carbide powder and titanium powder. The density, microhardness, microstructure, phase, tensile properties and fracture morphology of the composites were systematically studied. The results show that, with the increase of boron carbide particle content, the density and microhardness of sintered and rolled composites also increase. XRD analysis shows that TiC and TiB form between boron carbide particles and titanium matrix. The maximum tensile strength of the rolled titanium-based composite with 3 vol% B_4C can reach 800 MPa, and the tensile strength is improved due to the effect of TiC and TiB. The fracture occurs mainly at B_4C particles and the interface between B_4C particles and matrix.
The titanium matrix composite plate was prepared by spark plasma sintering(SPS) and rolling with different volume fraction of boron carbide powder and titanium powder. The density, microhardness, microstructure, phase, tensile properties and fracture morphology of the composites were systematically studied. The results show that, with the increase of boron carbide particle content, the density and microhardness of sintered and rolled composites also increase. XRD analysis shows that TiC and TiB form between boron carbide particles and titanium matrix. The maximum tensile strength of the rolled titanium-based composite with 3 vol% B_4C can reach 800 MPa, and the tensile strength is improved due to the effect of TiC and TiB. The fracture occurs mainly at B_4C particles and the interface between B_4C particles and matrix.
引文
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