Montealegre-Melendez Isabel, Arévalo Cristina, Ariza Enrique, Pérez-Soriano Eva M, Rubio-Escudero Cristina, Kitzmantel Michael, Neubauer Erich
Department of Engineering and Materials Science and Transportation, School of Engineering, Universidad de Sevilla, Camino de los Descubrimientos s/n, 41092 Seville, Spain.
RHP-Technology GmbH, Forschungs-und Technologiezentrum, 2444 Seibersdorf, Austria.
Materials (Basel). 2017 Oct 27;10(11):1240. doi: 10.3390/ma10111240.
In the last decade, titanium metal matrix composites (TMCs) have received considerable attention thanks to their interesting properties as a consequence of the clear interface between the matrix and the reinforcing phases formed. In this work, TMCs with 30 vol % of B₄C are consolidated by hot pressing. This technique is a powder metallurgy rapid process. Incorporation of the intermetallic to the matrix, 20 vol % (Ti-Al), is also evaluated. Here, the reinforcing phases formed by the reaction between the titanium matrix and the ceramic particles, as well as the intermetallic addition, promote substantial variations to the microstructure and to the properties of the fabricated composites. The influences of the starting materials and the consolidation temperature (900 °C and 1000 °C) are investigated. By X-ray diffraction, scanning and transmission electron microscopy analysis, the in-situ-formed phases in the matrix and the residual ceramic particles were studied. Furthermore, mechanical properties are studied through tensile and bending tests in addition to other properties, such as Young's modulus, hardness, and densification of the composites. The results show the significant effect of temperature on the microstructure and on the mechanical properties from the same starting powder. Moreover, the Ti-Al addition causes variation in the interface between the reinforcement and the matrix, thereby affecting the behaviour of the TMCs produced at the same temperature.
在过去十年中，钛基金属基复合材料（TMCs）因其基体与增强相之间形成的清晰界面所带来的有趣性能而受到了广泛关注。在本工作中，通过热压工艺对含有30体积% B₄C的TMCs进行了固结。该技术是一种粉末冶金快速工艺。还评估了向基体中加入20体积%（Ti-Al）金属间化合物的情况。在此，由钛基体与陶瓷颗粒之间的反应形成的增强相以及金属间化合物的添加，对所制备复合材料的微观结构和性能产生了显著变化。研究了原材料和固结温度（900℃和1000℃）的影响。通过X射线衍射、扫描和透射电子显微镜分析，对基体中原位形成的相和残余陶瓷颗粒进行了研究。此外，除了复合材料的杨氏模量、硬度和致密化等其他性能外，还通过拉伸和弯曲试验研究了其力学性能。结果表明，对于相同的起始粉末，温度对微观结构和力学性能有显著影响。此外，Ti-Al的添加导致增强体与基体之间的界面发生变化，从而影响了在相同温度下制备的TMCs的性能。
