Method of forming a coating with controlled grain

专利名称：Method of forming a coating with controlled

grain size and morphology for enhancedwear resistance and toughness

发明人：Sakari Ruppi申请号：US11783816申请日：20070412公开号：US07927663B2公开日：20110419

摘要：Wear resistance of the prior-art Ti(C,N) layers can be considerably enhanced byoptimizing the grain size and microstructure. This invention describes a method to obtaincontrolled, fine, equiaxed grain morphology in Ti(C,N) layers produced using moderatetemperature CVD (MTCVD). The method includes the step of doping using CO, CO,ZrC1and A1C1or combinations of these to control the grain size and shape. Doping hasto be controlled carefully in order to avoid nanograined structures and oxidization.Doping is further controlled to produce grain size that is from about 50 to about 300 nm,preferably from about 50 to about 150; a lack of any strong preferred growthorientation; and a length-to-width ratio (L/W) of less than 3 and only with a slight tomoderate XRD line broadening.

申请人：Sakari Ruppi

地址：Fagarsta SE

国籍：SE

代理机构：Drinker Biddle & Reath LLP

更多信息请下载全文后查看