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Fabrication and characterization of TiAl/Ti3Al-based intermetallic composites (IMCs) reinforced with ceramic particles
Composites TiAl
2009/12/2
TiAl/Ti3Al-based alloys have several advantages over conventional titanium alloys, such as higher elastic modulus, lower density, better mechanical properties at elevated temperatures, and higher oxid...
采用等离子喷涂和激光重熔复合工艺在TiAl合金表面制备了Al2O3-13wt%TiO2复合陶瓷涂层。为了减少重熔层裂纹等缺陷,采用较低的激光功率和能量密度进行重熔。用扫描电镜(SEM),能谱仪(EDS)和X射线衍射仪(XRD)分析了涂层形貌、微观结构和相组成。结果表明,经过激光重熔处理后,陶瓷涂层颗粒细化,片层状组织得以消失,致密性提高,获得了基本没有裂纹等缺陷的重熔层;激光重熔亚稳相-γAl2O...