• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>Materials >Microstructure of Coatings on Nickel and Steel Platelets Obtained by Co-Milling with NiAl and CrB2 Powders
【2h】

Microstructure of Coatings on Nickel and Steel Platelets Obtained by Co-Milling with NiAl and CrB2 Powders

机译：与NiAl和CrB2粉末共磨获得的镍和钢血小板涂层的微观结构

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Metal matrix composite coatings are developed to protect parts made from materials susceptible to wear, like nickel alloys or stainless steel. The industry-established deposition method is presently an atmospheric plasma spraying method since it allows the production of both well-adhering and thick coatings. Alternatively, similar coatings could be produced by co-milling of ceramic and alloyed powders together with metallic plates serving as substrates. It results in mechanical embedding of the powder particles into exposed metallic surfaces required coatings. The present experiment was aimed at the analysis of microstructure of such coatings obtained using NiAl and CrB2 powders. They were loaded together with nickel and stainless steel platelets into ball mill vials and rotated at 350 rpm for up to 32 h. This helped to produce coatings of a thickness up to ~40 µm. The optical, scanning, and transmission electron microscopy observations of the coatings led to conclusion that the higher the rotation speed of vials, the wider the intermixing zone between the coating and the substrate. Simultaneously, it was established that the total thickness of the coating deposited at specified conditions is limited by the brittleness of its nanocrystalline matrix. An increase in the hardness of the substrate results in a decrease of the intermixing zone. The above results indicate that even as the method based on mechanical embedding could so far produce thinner coatings than the plasma spraying, in the former case they are characterized by a more uniform nanocrystalline matrix with homogenously distributed fine ceramic particles.
机译：开发了金属基复合涂层，以保护由易磨损材料（例如镍合金或不锈钢）制成的零件。工业上公认的沉积方法目前是一种大气等离子体喷涂方法，因为它可以生产附着力强的涂层和厚涂层。可替代地，可以通过共同研磨陶瓷和合金粉末以及用作基底的金属板来生产类似的涂层。这导致粉末颗粒机械嵌入到需要的涂层的暴露金属表面中。本实验旨在分析使用NiAl和CrB2粉末获得的此类涂层的微观结构。将它们与镍和不锈钢血小板一起装入球磨瓶中，并以350 rpm的速度旋转长达32小时。这有助于生产厚度高达〜40 µm的涂层。涂层的光学，扫描和透射电子显微镜观察得出结论，即小瓶的旋转速度越高，涂层与基材之间的混合区域越宽。同时，已经确定在特定条件下沉积的涂层的总厚度受到其纳米晶体基质的脆性的限制。基材硬度的增加导致混合区域的减少。以上结果表明，即使迄今为止基于机械嵌入的方法所产生的涂层比等离子喷涂还薄，在前一种情况下，它们的特征还在于具有均匀分布的细陶瓷颗粒的更均匀的纳米晶基质。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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