Myalska-Głowacka Hanna, Chmiela Bartosz, Godzierz Marcin, Sozańska Maria
Faculty of Materials Engineering, Silesian University of Technology, Krasinskiego 8, 40-019 Katowice, Poland.
Centre of Polymer and Carbon Materials Polish Academy of Sciences, Curie-Sklodowskiej 34, 42-819 Zabrze, Poland.
Materials (Basel). 2022 Mar 29;15(7):2517. doi: 10.3390/ma15072517.
A hot pressing process was employed to produce titanium-based composites. Nanosized TiC particles were incorporated in order to improve mechanical properties of the base material. The amount of nanosized additions in the composites was 0.5, 1.0, and 2.0 wt %, respectively. Moreover, a TiB phase was produced by in situ method during sintering process. The microstructure of the Ti-TiB-TiC composites was characterized by scanning electron microscopy (SEM), electron probe microanalysis (EPMA), electron backscatter diffraction (EBSD), and X-ray diffraction (XRD) techniques. Due to the hot pressing process the morphology of primary TiC particles was changed. Observed changes in the size and shape of the reinforcing phase suggest the transformation of primary carbides into secondary carbides. Moreover, an in situ formation of TiB phase was observed in the material. Additionally, residual stress measurements were performed and revealed a mostly compressive nature with the fine contribution of shear. With an increase in TiC content, linear stress decreased, which was also related with the presence of the TiB phase.
采用热压工艺制备钛基复合材料。加入纳米级TiC颗粒以改善基体材料的力学性能。复合材料中纳米级添加剂的含量分别为0.5、1.0和2.0 wt%。此外，在烧结过程中通过原位法生成了TiB相。采用扫描电子显微镜（SEM）、电子探针微分析（EPMA）、电子背散射衍射（EBSD）和X射线衍射（XRD）技术对Ti-TiB-TiC复合材料的微观结构进行了表征。由于热压工艺，初生TiC颗粒的形态发生了变化。观察到增强相尺寸和形状的变化表明初生碳化物向次生碳化物的转变。此外，在材料中观察到TiB相的原位形成。另外，进行了残余应力测量，结果表明残余应力主要为压应力，并有少量剪应力贡献。随着TiC含量的增加，线性应力降低，这也与TiB相的存在有关。
