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基于自組裝技術(shù)改性處理鈦金屬的摩擦學(xué)特性研究
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國家自然科學(xué)基金資助項(xiàng)目(50275015)


Tribological Properties of Modified Titanium Based on Self-Assembled Technique
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    摘要:

    為了使鈦金屬應(yīng)用于具有相對運(yùn)動(dòng)的摩擦副，采用自組裝技術(shù)對鈦金屬表面進(jìn)行改性處理，并對制備的試樣進(jìn)行紫外照射。利用接觸角測量儀、原子力顯微鏡和微摩擦磨損試驗(yàn)機(jī)對制備的試樣進(jìn)行表征和摩擦學(xué)特性測試，探討不同方法進(jìn)行鈦金屬表面羥基化的作用效果，并分析載荷、滑動(dòng)速度以及紫外照射對試樣摩擦學(xué)特性的影響。結(jié)果表明：Piranha溶液結(jié)合紫外照射能有效地提高鈦基底的羥基化程度，經(jīng)FOTS (Perfluorooctyltrichlorosilane)自組裝分子膜改性處理的鈦金屬表面平整均勻，具有疏水特性和良好的摩擦學(xué)性能。Si3N4球與FOTS自組裝分子改性處理試樣間的摩擦系數(shù)隨載荷和滑動(dòng)速度的增大而增大。紫外照射5 min可有效地提高FOTS自組裝分子膜改性處理的效果，在降低摩擦系數(shù)的同時(shí)，薄膜也具有良好的耐久性

    Abstract:

    In order to use titanium in frictional pair with relative motion, titanium surfaces were modified by self-assembled method and the prepared samples were irradiated by ultraviolet radiation/ozone photochemical process. The characterization and tribological properties of samples were conducted by contact angle measuring meter, atomic force microscopy and microtribometer, and the hydroxylation of titanium surfaces by different methods was explored. The effects of load, sliding velocity and ultraviolet radiation on the tribological properties of samples were analyzed. The results show that the combining Piranha solution with ultraviolet radiation/ozone photochemical process can prove the effect of titanium surfaces hydroxylation. The titanium surface modified by FOTS SAMs is uniform and exhibits good hydrophobic and tribological properties. The friction coefficient between Si3N4 balls and sample surfaces modified by FOTS SAMs increases with load and sliding velocity increasing. The effect of modification treated by FOTS SAMs can be improved by an ultraviolet radiation/ozone photochemical process for 5 min. The durability of friction pairs is retained in the case of reduction of coefficient of friction for the modified titanium surfaces

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孫昌國,張會(huì)臣.基于自組裝技術(shù)改性處理鈦金屬的摩擦學(xué)特性研究[J].稀有金屬材料與工程,2009,38(11):1978~1982.[Sun Changguo, Zhang Huichen. Tribological Properties of Modified Titanium Based on Self-Assembled Technique[J]. Rare Metal Materials and Engineering,2009,38(11):1978~1982.]
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  • 收稿日期:2008-10-26
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