Effects of Carbon Content and Nitrogen Pressure on Synthesis of Ti2Al(C, N)
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摘要: 在不同碳含量和氮气压力的条件下，采用热压烧结合成Ti2Al （C，N）。使用X射线衍射（XRD）分析物相，三点抗弯测试强度并用扫描电镜（SEM）分析断口形貌，结果表明：碳含量对纯Ti2Al （C，N）相的生成无明显影响，高氮气压力有利于合成纯Ti2Al （C，N），却不利于试样的致密化，密度、晶体发育程度和杂相共同影响试样的强度。实际碳含量与理论碳含量比例为0.6，氮气压力40 kPa条件下烧结试样为Ti2Al （C，N）/TiAl复合材料，其抗弯强度最高，可达330 MPa。
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关键词:
- Ti2Al(C,N) /
- 合成 /
- 碳含量 /
- 氮气 /
- 压力
Abstract: Ti2Al(C,N)was synthesized by hot pressing sintering under different carbon content and nitrogen pressure.The phase was analyzed by X-ray diffraction(XRD).The three-point bending strength was tested and the fracture morphology was analyzed by scanning electron microscopy(SEM).The results showed that the carbon content had no significant effect on the formation of pure Ti2Al(C,N)phase,and a high nitrogen pressure was beneficial to the synthesis of pure Ti2Al(C,N)but not conducive to the densification of samples.Density,crystallographic development and impurity phases affect the strength of the specimens.Ti2Al(C,N)/TiAl composite under 40 kPa of nitrogen pressure was obtained at the ratio of actual carbon content to theoretical carbon content of 0.6.The bending strength of the composite was the highest,reaching 330 MPa.-
Key words:
- Ti2Al(C,N) /
- synthesis /
- carbon content /
- nitrogen /
- pressure
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