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原子氧輻照下GF/PI和nano-TiO2/GF/PI復(fù)合 材料的摩擦學(xué)性能研究

Studies on the tribological properties of GF/PI and nano-TiO2/GF/PI composites irradiated by atomic oxygen

  • 摘要: 文章研究了原子氧輻照下GF/PI和nano-TiO2/GF/PI復(fù)合材料的摩擦學(xué)性能，結(jié)合結(jié)構(gòu)分析探討了原子氧輻照對(duì)其摩擦學(xué)性能的影響機(jī)理。研究發(fā)現(xiàn)原子氧輻照能夠破壞復(fù)合材料表面的樹脂基體分子鏈，引起復(fù)合材料表面結(jié)構(gòu)發(fā)生變化。原子氧輻照對(duì)PI復(fù)合材料的摩擦系數(shù)影響不大，但有使其磨損率降低的趨勢(shì)，這可以歸因于復(fù)合材料表面化學(xué)結(jié)構(gòu)和組成的變化對(duì)對(duì)偶鋼環(huán)上的轉(zhuǎn)移膜所產(chǎn)生的影響。

     

    Abstract: The tribological properties of GF/PI and nano- TiO2/GF/PI composites irradiated by atomic oxygen are studied in this paper. The influencing mechanism of atomic oxygen irradiation is discussed, and the structural analysis of the composite surface is carried out before and after the irradiation. It is found that atomic oxygen irradiation could destroy the matrix molecular chains in the composite surface, and change the surface structure of the composite. The friction coefficient of the PI composite is little influenced by atomic irradiation, which, however, tends to reduce the wear rate to some extent. The variation of tribological properties of PI composites induced by atomic oxygen irradiation might be due to the influence of the changed surface structure and composition on the transfer films formed on the counterpart steel rings.

     

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