SGER: Novel Method for Fabrication of Adherent Diamond Coated Cutting Tools

9314270辛格该项目寻求开发一种新的创新方法，以改善金刚石薄膜在硬质合金和陶瓷刀具材料上的附着力。它将采用一种创新的蚀刻技术，该技术将创建一个三维机械和化学梯度界面，以分布在工具操作过程中遇到的剪应力和热应力。与其他工艺相比，该工艺有望提高粘接强度。表面改性硬质合金(WC/Co)和陶瓷(Si3N4，晶须增强氧化铝)刀具将按标准方法在CVD金刚石上涂覆一层，并对这些样品进行结合强度和车削试验。这项研究将与工业界合作进行。金刚石膜与硬质合金刀具的结合强度一直是CVD(化学气相沉积)金刚石在刀具工业应用中最突出的问题之一。如果能改善附着力，就有可能实现廉价的金刚石涂层刀具在机械加工中的广泛应用。

9314270 Singh The project seeks to develop a new and innovative method to improve the adhesion properties of diamond films on carbide and ceramic cutting tool materials. It will employ an innovative etching technique which will create a three dimensional mechanically and chemically graded interface to distribute the shear and thermal stresses encountered during the tool operation. This process is expected to increase the adhesion strength compared to other techniques. Both surface modified sintered carbide (WC/Co) and ceramic (Si3N4, whisker reinforced alumina) cutting tools will be coated with CVD diamond using standard methods, and a adhesion strength and turning tests will be conducted on these samples. The research will be carried out in collaboration with industry. The adhesion strength of diamond films to uncoated carbide tools remains one of the most outstanding problems for application of CVD (chemical vapor deposition) diamond in the cutting tool industry. If adhesion can be improved, the extensive application of inexpensive, diamond coated tools in machining may be realized.