(大連海事大學(xué)交通運(yùn)輸裝備與海洋工程學(xué)院，大連 116026)
摘 要: 為研究表面形貌和潤(rùn)濕性對(duì)表面摩擦學(xué)性能的影響，采用激光加工技術(shù)在Ti6Al4V表面加工間距為100 μm的網(wǎng)格和點(diǎn)陣微結(jié)構(gòu)，將SiO2納米粒子涂覆在微結(jié)構(gòu)上構(gòu)建微納結(jié)構(gòu)。采用接觸角測(cè)量?jī)x測(cè)量試樣的表面接觸角和滾動(dòng)角，采用摩擦磨損實(shí)驗(yàn)機(jī)(UMT)測(cè)試摩擦學(xué)性能，采用LEXT OLS4000型3D激光共聚焦顯微鏡進(jìn)行表面形貌和磨痕表征。結(jié)果表明：在具有微結(jié)構(gòu)的表面涂覆SiO2可制備出具有微納結(jié)構(gòu)的超疏水Ti6Al4V表面，且網(wǎng)格表面比點(diǎn)陣表面更難以潤(rùn)濕。表面越難以潤(rùn)濕，試樣的比磨損率越低，點(diǎn)陣和網(wǎng)格超疏水表面分別將比磨損率降低32.3%和53.8%，且摩擦因數(shù)曲線的波動(dòng)幅度和數(shù)值均減小。且具有微納結(jié)構(gòu)的超疏水表面可顯著提高Ti6Al4V的摩擦學(xué)性能。
關(guān)鍵字: 鈦合金；疏水；超疏水；摩擦學(xué)性能
（College of Transportation Equipment and Ocean Engineering,
Dalian Maritime University,Dalian 116026, China）
Abstract:In order to study the impacts of the surface pattern and wettability on tribological performance,the laser processing was used to prepare grid and dot micro-structure with spacing of 100μm on Ti6Al4V alloy surface. The SiO2nano particles were coated on the micro-structures to build micro-nano structures. The contact angles and roll angles were measured by contact angle measurement. The tribological performance was evaluated by universal micro-tribometer(UMT). The micrograph and wear tracks were investigated by LEXT OLS4000 3D laser scanning confocal microscopy. The results show thatthe super hydrophobic Ti6Al4V surfaces with the micro-nano structure can be prepared by coating the SiO2nano particles on the micro-structures.The grid surface is more difficult to be wet than dot surface.The harder the surface is wet, the lower the wear rate of sample is. The wear rates of super hydrophobic surface with dot and grid decrease by 32.3% and 53.8%, respectively, while the fluctuation and value of friction coefficient curve both decrease. The super hydrophobic Ti6Al4V surfaces with the micro-nano structuresignificantly improve the tribological properties of titanium alloy.
Key words: titanium alloy; hydrophobic; super hydrophobic; tribological performance
