Wang Ning, Choi Yongbum, Oue Kentaro, Matsugi Kazuhiro
Department of Mechanical Science and Engineering, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshimasi, Hiroshimaken, 739-8527, Japan.
Mechanical Engineering Program, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshimaken, 739-8527, Japan.
Sci Rep. 2022 Nov 9;12(1):19154. doi: 10.1038/s41598-022-23796-4.
Titanium matrix composites (TMCs) with TiC reinforcements were fabricated by an in-situ method that evolves pure titanium foils (thick: 100 μm) and graphite powder sheets by spark plasma sintering. 20 μm thick graphite powder sheets with PVA (polyvinyl alcohol) were fabricated as carbon resources. The effects of different sintering temperatures and heating time on microstructural features, interface, and properties of the composites were investigated. The structural and microstructural analyses were performed by EPMA, FE-SEM, and EDS. The XRD patterns taken from the cross-section of the prepared composites revealed the composites are composed of TiC and hexagonal close-packed (HCP) α-Ti. Homogeneous rod-like TiC particles reinforced TMCs were evaluated by tensile property. The tensile properties of the rod-like TiC-reinforced TMC show that the tensile strength (UTS) is 479 Mpa, which is 81.4% higher than pure titanium. The formation mechanism and enhancement mechanism of rod-like TiC particles are also discussed.
采用原位法制备了含TiC增强相的钛基复合材料（TMCs），该方法通过放电等离子烧结使纯钛箔（厚度：100μm）和石墨粉片发生反应。以含聚乙烯醇（PVA）的20μm厚石墨粉片作为碳源。研究了不同烧结温度和加热时间对复合材料微观结构特征、界面及性能的影响。通过电子探针微分析仪（EPMA）、场发射扫描电子显微镜（FE-SEM）和能谱仪（EDS）进行结构和微观结构分析。从制备的复合材料横截面获取的X射线衍射（XRD）图谱表明，该复合材料由TiC和六方密排（HCP）α-Ti组成。通过拉伸性能评估了均匀棒状TiC颗粒增强的TMCs。棒状TiC增强TMCs的拉伸性能表明，其抗拉强度（UTS）为479MPa，比纯钛高81.4%。还讨论了棒状TiC颗粒的形成机制和增强机制。
