摘要
采用微弧氧化法在纯钛材及大变形纯钛材表面制备了含钙、磷的多孔氧化膜层,研究膜层的微观形貌、硬度、膜基结合力、滚动摩擦磨损性能等性能,探讨钛基材组织细化对其膜层结构及力学性能的影响。结果表明:与纯钛材微弧氧化膜层相比,大变形纯钛材微弧氧化膜层表面微纳米尺度的孔洞更多,孔隙率更高(10.84%vs.9.68%),孔洞孔径更小(8.67μm vs.9.68μm),表面更平坦,锐钦矿相含量更高(43.13%vs.37.74%),膜-基结合能力更强(17 N vs.8N),摩擦系数较低(0.338 vs.0.358),耐磨性能更优,以上的膜层结构及力学性能的改善归因于其钛基材大变形化提高了晶体缺陷。
Porous oxide coatings containing Ca and P were prepared on the surface of titanium and large plastic deformed titanium by micro-arc oxidation （MAO）. The surface morphology, hardness, film-substrate bonding force, fretting friction and wear properties and bioactivity of MAO coatings on titanium and large plastic deformed titanium were investigated. Results reveal that compared with the MAO coating of conventional titanium, there are more pores on the MAO coating of large plastic deformed titanium distributed more uniformly and compactly, which have smaller size （8.67 μm vs. 9.68 μm）. The MAO coating of large plastic deformed titanium has a better quantity, a higher porosity （10.84% vs. 9.68%） and hardness, a lower friction coefficient （0.338 vs. 0.358）, a stronger adhesion strength （17 N vs. 8 N）, a larger relative content of rutile TiO2 （43.13% vs. 37.74%） and a smoother and more-level surface. These improvements are caused by the increase of crystal defects （internal energy） due to the microstrncture refinement of large plastic deformed titanium.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2017年第2期473-478,共6页
Rare Metal Materials and Engineering
基金
江苏省高校自然基金重大项目(11KJA430004)
江苏省高校自然基金(12KJD460002)
江苏省优势学科资助
关键词
大变形纯钛材
微弧氧化
表面形貌
膜-基结合力
滚动磨损
large plastic deformed titanium
micro-arc oxidation （MAO）
surface morphology
film-substrate bonding force
rolling wear
