摘要
用溶胶 -凝胶法制备了纳米 Au-Ti O2 复合薄膜 .X射线衍射、X射线光电子能谱、原子力显微镜、紫外 -可见光谱及摩擦磨损实验研究表明 ,复合薄膜均匀致密 ,Au以纳米晶粒形式均匀、不连续分散镶嵌于Ti O2 基体中 ,纳米 Au粒径为 1 4～ 2 5 nm;复合薄膜在可见光区有较强的吸收 ,吸收峰位置和强度与烧结温度和金的添加量有关 ;复合薄膜具有良好的抗磨减摩性能 ,在 1 N负荷下 ,摩尔分数为 5 %的 Au-Ti O2 薄膜的摩擦系数仅为 0 .0 9～ 0 .1 0 ,耐磨寿命多于 2 0 0 0滑动周次 .
Nano Au TiO 2 composite thin films were successfully fabricated by a facile sol gel process. The morphology, mircrostructure and properties of composite thin films were investigated via atomic force microscopy, X ray diffractometry, X ray photoelectron spectroscopy, UV Vis optical absorption spectroscopy and one way reciprocating tribometer. The surfaces of thin film were uniform, compact and crack free. Au particles were well dispersed in TiO 2 matrix with a size of 14-25 nm in diameter. The composite thin films have a strong optical absorption. The peak position and intensity were related to the sintered temperature and the Au content. The composite thin films sliding against AISI 52100 steel ball displayed an excellent wear resistance and friction reduction reduction performance. With a 5.0%(molar fraction) Au, the friction coefficient was only 0.09-0.10 and the wear life was more than 2 000 sliding cycles at a sliding speed of 90 mm/min and a load of 1.0 N.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2002年第8期1574-1578,共5页
Chemical Journal of Chinese Universities
基金
国家自然科学杰出青年基金 (批准号 :5 982 5 116)资助
