聚乙烯醇水凝胶/钛合金摩擦磨损特性的正交试验研究  

Friction Characteristics of Poly Vinyl Alcohol Hydrogel Against Titanium Alloy Studied by Orthogonal Method

作　　者：潘育松[1] 熊党生[1] 马如银[1] 

机构地区：[1]南京理工大学材料科学与工程系,江苏南京210094

出　　处：《摩擦学学报》2007年第2期132-136,共5页Tribology

基　　金：国家自然科学基金资助项目(50575106)

摘　　要：利用冷冻-解冻法制备聚乙烯醇(PVA)水凝胶,运用正交试验法在球-盘摩擦磨损试验机上研究滑动速度、载荷和润滑状态对PVA水凝胶/钛合金摩擦副摩擦系数的影响及在不同载荷下的磨损性能.结果表明:滑动速度、载荷和润滑状态3种因素对PVA水凝胶/钛合金球摩擦副的摩擦系数影响显著程度由高到低依次为载荷>滑动速度>润滑状态;在干摩擦和水润滑状态下,摩擦系数变化甚微,平均摩擦系数随滑动速度的增加而下降,随着载荷增加而升高;当转速从110 r/min升至220 r/min时,平均摩擦系数从0.038降至0.031,降幅达19.4%;当载荷从5 N增至10 N时,平均摩擦系数从0.027增至0.042,增幅达51.8%;PVA水凝胶的磨损率随载荷增加而降低且载荷对磨损率影响的显著程度逐渐降低;当载荷从5 N增至10 N时,磨损率降幅高达2.6倍,当载荷从10 N增至15 N时,仅下降35%.Poly vinyl alcohol （PVA） hydrogel was prepared from aqueous solution of the polymer by freezing and thawing method. A three-factor, two-level experiment was designed to investigate the effects of different factors on the friction and wear properties of PVA hydrogel by ball-plate friction and wear tester. Friction coefficient of the PVA hydrogel depended significantly on load and sliding speed, and lubricant had little influence on the friction. Friction coefficient decreased with the increase of sliding speed and it increased with the increase of the load. Average friction coefficient decreased from 0. 038 to 0. 031 while the sliding speed increased from 110 r/min to 220 r/ min, and the average friction coefficient increased from 0.027 to 0.042, as the load increased from 5 N to 10 N. Wear ratio of PVA hydrogel under distilled water decreased with the increase of applied load, and the influence of load on wear rate was gradually weakened with the increase of applied load. Wear rate decreased 2.6 times when the load increased from 5 N to 10 N, whereas, it only dropped 35% when the load rising from 10 N to 15 N.

关 键 词：聚乙烯醇水凝胶 钛合金 摩擦磨损特性 

分 类 号：R318.08[医药卫生—生物医学工程] TH117.3[医药卫生—基础医学]