体育设备用TiAl_(3)/ADC12复合材料的力学性能及耐腐蚀性能研究

Study on Mechanical Properties and Corrosion Resistance of TiAl_(3)/ADC12 Composites Used for Sports Equipments

采用超声振动法制备体育设备用TiAl_(3)/ADC12复合材料,利用光学显微镜、X射线衍射仪、扫描电镜、能谱分析仪和万能试验机研究了超声时间对复合材料的微观组织、力学性能和耐腐蚀性能的影响。结果显示,适当的超声时间使得复合材料的微观组织更细化,TiAl_(3)增强相的尺寸较小,分布均匀,呈现为沿一定方向生长的长条状。增大超声时间,复合材料的密度、硬度、拉伸强度先增大后减小,伸长率先减小后增大。在超声时间为90 s时,TiAl_(3)/ADC12复合材料的微观组织细化最明显,初生α-Al颗粒尺寸最小、形貌最圆整,复合材料的密度、硬度、伸长率和拉伸强度达到最大值,腐蚀面的腐蚀坑变小,腐蚀面积和腐蚀产物减少。

TiAl_(3)/ADC12 composites for sports equipment were prepared by ultrasonic vibration method.The effects of ultrasonic vibration time on microstructure,mechanical properties and corrosion resistance of the composites were studied by optical microscope,X-ray diffractometer,scanning electron microscope,energy dispersive spectrometer and universal testing machine.The results showed that the microstructure of the composite was refined with appropriate ultrasonic time,and the size of TiAl_(3) was smaller and the distribution was uniform,and the morphology of the TiAl_(3) was a long strip shape growing along a certain direction.With the increase of the ultrasonic time,the density,hardness and tensile strength of the composites first increased and then decreased,and the elongation first decreased and then increased.When the ultrasonic time was 90 s,the microstructure of the TiAl_(3)/ADC12 composite was the most refined and the primaryα-Al phase was the smallest and roundest.The density,hardness,elongation and tensile strength of the composites reached the maximum.The corrosion pits on the corrosion surface became smaller and the corrosion area and corrosion products decreased.