YG8硬质合金表面的C+V双离子注入研究

Study on surface modification of YG8 hard alloy by C+V ion implantation

摘要:

为了增强YG8硬质合金的性能,应用金属蒸汽真空弧离子源在其表面进行了几种不同剂量的C+V双离子注入处理.通过金相显微镜、X射线衍射以及拉曼光谱等方法,对注入试样表面进行了结构表征和分析.实验结果表明:注入后硬质合金表面有C、VC和V7O3等新相生成,且C+V双离子注入对形成类金刚石结构有积极地促进作用;此外,还发现了样品表面的硬度、摩擦系数以及防腐蚀能力等性能均得到明显的改善.分析认为,硬质合金表面的C+V双离子注入改性,不仅受到了新相生成的的影响,而且与注入本身的机制相关.

Abstract:

To enhance the property of YG8 hard alloy,two elements of carbon and vanadium were implanted into its surface by using Metal Vapor Vacuum Arc(MEVVA) source with several different doses.The structure of sample surface is characterized and analyzed with metallurgical microscope,X-ray diffraction and Raman spectrum,respectively.The results show that there exist new phases of C,VC,and V7O3 in the sample surface,and that C+V ion implantation actively promotes the formation of DLC structure.Moreover,it can be found that the performances of sample surface(such as microhardness,coefficient of friction and corrosion resistance) are evidently improved.In conclusion,the surface modification of YG8 hard alloy by C+V ion implantation is not only affected by the appearance of new phase,but also related to the implantation mechanism.