• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Tribological Properties of Polyimide Coatings Filled with PTFE and Surface-Modified Nano-Si_3N_4
【24h】

Tribological Properties of Polyimide Coatings Filled with PTFE and Surface-Modified Nano-Si_3N_4

机译：聚四氟乙烯和表面改性纳米Si_3N_4填充的聚酰亚胺涂层的摩擦学性能

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Polyimide (PI) coatings filled with PTFE and nano-Si_3N_4 were prepared by a spraying technique and successive curing. Nano-Si_3N_4 particles were modified by grafting 3-aminopropyltriethoxysilane to improve their dispersion in the as-prepared coatings. Friction and wear performances and wear mechanisms of the coatings were evaluated. The results show that the incorporations of PTFE and modified nano-Si_3N_4 particles greatly improve the friction reduction and wear resistance of PI coating. The friction and wear performance of the composite coating is significantly affected by the filler mass fraction and sliding conditions. PI coating incorporated with 20 wt % PTFE and 5 wt % modified nano-Si_3N_4 displays the best tribological properties. Its wear rate is more than one order of magnitude lower and its friction coefficient is over two times smaller than that of the unfilled PI coating. Differences in the friction and wear behaviors of the hybrid coatings as a function of filler or sliding condition are attributed to the filler dispersion, the characteristic of transfer film formed on the counterpart ball and the wear mechanism of the coating under different sliding conditions.
机译：通过喷涂技术和连续固化制备填充有PTFE和纳米Si_3N_4的聚酰亚胺（PI）涂层。通过接枝3-氨基丙基三乙氧基硅烷对纳米Si_3N_4颗粒进行了改性，以改善它们在制备好的涂层中的分散性。评价了涂层的摩擦磨损性能和磨损机理。结果表明，PTFE和改性的纳米Si_3N_4纳米粒子的掺混大大改善了PI涂层的减摩性和耐磨性。复合涂层的摩擦和磨损性能受填料质量分数和滑动条件的影响很大。掺有20 wt％PTFE和5 wt％改性纳米Si_3N_4的PI涂层具有最佳的摩擦学性能。它的磨损率比未填充的PI涂层低1个数量级以上，摩擦系数小2倍以上。杂化涂层的摩擦和磨损行为随填料或滑动条件而变化的差异归因于填料的分散性，配对球上形成的转移膜的特性以及在不同滑动条件下涂层的磨损机理。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号