High Toughness Diamond Composites

金刚石陶瓷的可行性已经在crystume上通过将金刚石粉末与CVD金刚石合并到接近全密度生产几毫米厚的圆盘来证明。在这项研究中，我们将与加州大学伯克利分校合作开发一种高韧性的金刚石基复合材料。样品将在crystume中制备，其中立方氮化硼粉末掺入CVD金刚石基体中以增强韧性。机械测试将在加州大学伯克利分校的材料科学与矿物工程系进行，以检查疲劳和断裂性能。研究结果将为优化第二阶段金刚石复合材料的磨损和切削应用提供依据。这种新材料可以加工成有用的形状，并将表现出优异的硬度，特殊的韧性和高导热性。高韧性金刚石复合材料将在磨料磨损和切削工具应用中引起广泛关注。这项工作将提供一种新材料，可以生产出有用的形状，并且不需要耐磨涂层。产品可能包括刀具刀片、轴承元件和结构部件。

The feasibility of diamond ceramics has been demonstrated at Crystallume by consolidating diamond powder with CVD diamond to near full density producing disks of several millimeter thickness. In this study, we will develop a high toughness diamond matrix composite in collaboration with the University of California, Berkeley. Samples will be fabricated at Crystallume in which cubic boron nitride powder is incorporated in a CVD diamond matrix for enhancing toughness. Mechanical testing will be performed at the Materials Science and Mineral Engineering Department, University of California, Berkeley, to examine fatigue and fracture properties. The results of this study will provide the basis for optimizing diamond composite microstructures in Phase II for wear and cutting applications. This new material can be processed in useful shapes and will exhibit superior hardness, exceptional toughness, and high thermal conductivity. A high toughness diamond composite will be of considerable interest in abrasive wear and cutting tool applications. The proposed work will provide a new material which can be produced in useful shapes and will not require a wear-resistant coating. Products may include tool inserts, bearing elements, and structural components.