【作者】 马玉宁；

【导师】 吕亚非；

【作者基本信息】 北京化工大学 ， 材料学， 2006， 硕士

【摘要】 研究了硅酸锆（ZrSiO₄）在半金属和无金属摩擦材料中的作用，对摩擦性能的影响和摩擦机理。硅酸锆作为磨料能够明显提高摩擦材料的升温及恢复摩擦系数，同时降低了材料的热膨胀。应用模糊综合评价原理，得出样品Zr-5.6和SM-5.6的摩擦稳定性最好。用扫描电镜和x-光衍射仪观察了摩擦表面。在无金属摩擦材料的摩擦表面上观测到硫酸钡膜、碳膜、铁迹和硅酸锆疏松孔洞。当硅酸锆含量较少时，生成硫酸钡膜和碳膜（层Ⅰ）。当硅酸锆含量较多时，由于硅酸锆的硬度大于铸铁摩擦盘，使摩擦盘的铁转移到摩擦材料表面（层Ⅱ）。在硅酸锆含量为5.6％时，摩擦材料表面生成的摩擦膜（层Ⅰ和层Ⅱ）最少。在半金属摩擦材料的摩擦表面上也观测到两种结构的摩擦层：层Ⅰ和层Ⅱ，层Ⅰ是由钢棉的塑性变形铺展而成的摩擦层，层Ⅱ是由铁磨屑聚集而成的摩擦层。当硅酸锆含量较少时，生成层Ⅰ。当硅酸锆含量较多时，生成层Ⅱ。在硅酸锆含量为5.6％时，摩擦材料表面生成的摩擦膜（层Ⅰ和层Ⅱ）最少。当层Ⅰ和层Ⅱ都较少或不存在时，摩擦材料的表面组成与配方组成相近，摩擦系数稳定。本文提出了一个模型来描述两种摩擦层的生成与破坏机理。通过控制摩擦表面组成更多还原

【Abstract】 The roles and friction mechanisms of zircon （ZrSiO₄） as an abrasive in both semi-metallic and s non-metallic friction materials as well as the effects of zircon on friction performance were investigated. The friction coefficient （μ） of two types of friction materials was obviously enhanced by addition of zircon. Barite films, altered layers, iron patches, zircon loose holes, transformation of organic materials on friction surface of non-metallic materials were observed by using SEM and XRD. It shown that barite films named as layer I can lower the wear rate and Fe transferred layer named as layer II can enhance μ. The transition between two layers was found on friction surface of Zr-5.6 （zircon content 5.6 vol. %）. On semi-metallic materials surfaces, two kinds of friction layers were also observed. Layer I formed by steel wool and layer II formed by Fe transferred layer were identified. The transition between two layers was also found on friction surface of SM-5.6 （zircon content 5.6 vol. %）. Both Zr-5.6 and SM-5.6 have less friction layers but show stable and good friction performance. The relationships among formulations, friction performance, and friction surfaces were summarized for both friction更多还原