| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5367425 | Applied Surface Science | 2011 | 6 Pages |
Ni modified layer was prepared on surface of the Ti6Al4V substrate by plasma surface alloying technique. Surface morphology, micro-structure, composition distribution, phase structure, and microhardness of the Ni modified layer were analyzed. Tribological performance of the Ni modified layer and Ti6Al4V substrate was investigated by using pin-on-disc tribometer. The results indicate that roughness of the Ni modified layer was increased due to formation of the micro-convex on the modified surface. The concentration of Ni gradually decreased from the surface to interior. The maximum content of Ni atoms was nearly 90%. The modified layer was composed of TiNi, Ti2Ni and Ti phases. The maximum microhardness of the Ni modified layer was about 677Â HV0.025 which was increased about two-fold of microhardness of the control Ti6Al4V substrate. Wear resistance of the Ni modified layer was improved obviously, and showed micro-abrasion wearing. The strengthened mechanism of the as-treated Ti6Al4V alloy is discussed.
⺠The Ni modified layer is prepared by plasma surface alloying technique. ⺠The Ni modified layer is composed of TiNi, Ti2Ni and Ti phases. ⺠The hardness of the Ni modified layer is improved. ⺠Better tribological performance is attributed to synergy of Ti2Ni and TiNi. ⺠The Ni modified layer shows micro-abrasion wearing.
