论文部分内容阅读
在电弧炉中利用吸铸法制备了直径1-4 mm的原位生成TiC和β-Ti枝晶联合增强的块状Cu47Ti34Zr11Ni8非晶合金复合材料.DSC热分析结果表明,原位生成TiC颗粒的引入,没有影响基体合金的非晶形成能力.用OM,XRD,SEM,EDS等方法研究了复合材料的相组成、微观组织以及成分分布,结果表明,TiC颗粒作为异质形核中心促进了β-Ti枝晶的形成,形成了TiC颗粒和β-Ti枝晶联合增强的块状Cu47Ti34Zr11Ni8非晶合金复合材料,而且β-Ti枝晶的尺寸和数量与TiC颗粒的多少以及试样的尺寸有关.室温压缩试验表明,同单相非晶合金相比,块状Cu47Ti34Zr11Ni8非晶合金复合材料提高了抗压强度及塑性.
TiC and β-Ti dendrites were successfully prepared by arc casting in the presence of 1-4 mm in diameter, and the bulk Cu47Ti34Zr11Ni8 amorphous alloy composites were prepared by DSC.The DSC thermogravimetric analysis showed that the in-situ TiC particles The phase composition, microstructure and composition distribution of the composites were investigated by OM, XRD, SEM and EDS. The results show that the TiC particles promote β -Ti dendrites, the bulk Cu47Ti34Zr11Ni8 amorphous alloy composites with TiC particles and β-Ti dendrites are formed, and the size and number of β-Ti dendrites are related to the size of TiC particles and the size of the sample Compression tests at room temperature show that the bulk Cu47Ti34Zr11Ni8 amorphous alloy composites increase compressive strength and plasticity compared with single phase amorphous alloys.