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本文在网状结构钛复合材料的基础上,通过降低钛粉尺寸与增加球磨能量以增大钛粉比表面积,提高钛基复合材料最大增强相含量,以获得更高的增强效果,成功制备出了10vol.%、12vol.%、15vol.%、17vol.%TiBw/Ti复合材料,并分析了增强相含量继续增加对钛基复合材料组织及力学性能的影响规律。结果显示,制备的TiBw/Ti复合材料存在增强相富集区与增强相贫化区,并且随着增强相含量的提高,TiBw/Ti复合材料的抗拉强度呈先增大后减小的趋势,其中增强相含量为10vol.%的复合材料室温抗拉强度为846 MPa较基体纯钛提高了106.8%,其延伸率为3.7%。当增强相含量增加到12vol.%时,其室温抗拉强度达到970MPa。随着增强相含量提高,TiBw/Ti复合材料的高温压缩屈服强度不断提高,普遍较纯钛提高8倍以上,表现出非常优异的增强效果。
In this paper, based on the network structure of titanium composite material, by reducing the size of titanium powder and increasing the milling energy to increase the specific surface area of titanium powder, increasing the maximum reinforcing phase content of titanium matrix composites to obtain a higher enhancement effect, successfully prepared The effects of increasing the content of the reinforcing phase on the microstructure and mechanical properties of Ti-based composites were analyzed. The results show that the content of TiBw / Ti is 10vol.%, 12vol.%, 15vol.% And 17vol.% TiBw / Ti, respectively. The results show that the TiBw / Ti composites have enhanced phase enrichment zone and enhanced phase depletion zone, and the tensile strength of TiBw / Ti composites first increases and then decreases with the increase of the content of reinforcing phase The tensile strength at room temperature of the composites with enhanced phase content of 10vol.% Was 846 MPa, which increased by 106.8% compared with that of the substrate pure titanium and the elongation was 3.7%. When the content of reinforcing phase increases to 12vol.%, The tensile strength at room temperature reaches 970MPa. With the increase of the content of reinforcing phase, the yield strength of TiBw / Ti composites at high temperature is improved continuously, generally more than 8 times higher than that of pure titanium, showing a very excellent enhancement effect.