CAJ | 학술논문

目的：研究TC4表面等离子Ni改性层摩擦磨损情况,以提高航空用钛合金的使用寿命。方法以近等原子比TiNi二元合金作为源极靶材,利用等离子表面合金化技术在TC4表面制备Ni改性层,考察合金层的组织、成分、相结构以及硬度分布,分析Ni改性层和基体的摩擦学性能。结果 Ni改性层主要由Ti2 Ni,TiNi,Ti等相组成,Ni原子数分数最高为18%；表面硬度高达625HV；改性后的摩擦系数与基体相近,磨痕宽度是基材的1/3。结论 TC4表面等离子Ni改性层耐磨性增加。
목적：연구TC4표면등리자Ni개성층마찰마손정황,이제고항공용태합금적사용수명。방법이근등원자비TiNi이원합금작위원겁파재,이용등리자표면합금화기술재TC4표면제비Ni개성층,고찰합금층적조직、성분、상결구이급경도분포,분석Ni개성층화기체적마찰학성능。결과 Ni개성층주요유Ti2 Ni,TiNi,Ti등상조성,Ni원자수분수최고위18%；표면경도고체625HV；개성후적마찰계수여기체상근,마흔관도시기재적1/3。결론 TC4표면등리자Ni개성층내마성증가。
ABSTRACT:Objective In order to improve the service life of titanium alloy, which is widely used in aeronautical industry, fric-tion and wear properties of TC4 surface plasma Ni modified layer were studied. Methods In this process, the near-equiatomic TiNi binary metal was used as the sputtering source, and Ni modified layer was developed by plasma surface alloying technology. Micro-structure, ingredient distribution, phase structure, and hardness distribution of the Ni modified layer were analyzed. Friction and wear properties of Ni modified layer and the substrate were observed. Results The results indicated that the Ni modified layer was composed of Ti2 Ni, TiNi and Ti phases, and the maximum content of Ni element was nearly 18%. The surface hardness was about 625HV. The friction coefficient of Ni modified layer was comparable with that of the substrate material, and the grinding crack width was 1/3 of that of the substrate. Conclusion The wear property of the TC4 surface plasma Ni modified layer was improved.