采用低压烧结的方法制备Ti（C,N）基金属陶瓷材料,并结合C、N、O分析,XRD、BSE、EDS等测试手段研究了SD成型剂对Ti（C,N）基金属陶瓷合金的C含量、相组成及显微结构和力学性能的影响。结果表明,随着SD成型剂添加量的增加,脱胶后压坯的C含量逐渐增加,N含量逐渐减小;烧结后Ti（C,N）基金属陶瓷由（Ti,Me）（C,N）（Me=W、Mo、Ta）和Ni/Co固溶体相组成;显微组织以黑芯-白环结构为主,并伴随着少量白芯-灰环的结构。SD添加量为100mL/kg时,Ti（C,N）基金属陶瓷材料的抗弯强度达1929MPa,硬度为1588HV30,添加量为180mL/kg时,合金组织中石墨相的出现使其抗弯强度大幅度下降。
Effect of SD binder on contents of carbon,phase composition,microstructure and mechanical properties of the Ti(C,N)-based cermets which prepared by the low pressure sintering technology were determined through chemical analysis,X-ray diffraction(XRD),back scattering scanning electron microscopy(BSE) and energy dispersive spectrometer(EDS),respectively.The conclusions are as follows: the total carbon content of cermets compacts after debinding increases and the nitrogen content decreases as the SD binder increases.There are only two phases,(Ti,Me)(C,N)(Me=W,Mo,Ta) and Ni/Co solid solution existing in the Ti(C,N)-based cermets after sintering.The alloy exhibits a big volume fraction of black core-white rim structure.Meanwhile,small amount of white core-grey rim structure also exists.The preferable synthetically mechanical properties with transverse rupture strength of 1929MPa and a hardness of 1588HV30 can be obtained when 100mL/kg of SD binder was added.When the addition of SD binder is 180mL/kg,the graphite phase appears,causing significant decrease in the transverse rupture strength.
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