High Toughness Diamond Composites

高韧性金刚石复合材料

• 批准号: 9260860
• 负责人: Michael Drory
• 金额: $ 5万
• 依托单位: Crystallume
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-01-01 至 1993-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9260860&HistoricalAwards=false
• 关键词: Toughness; Diamond; Composites

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.

金刚石陶瓷的可行性已在 通过用CVD金刚石固结金刚石粉末来结晶， 接近全密度产生几毫米厚的盘。 在本研究中，我们将开发一种高韧性金刚石胎体 复合材料与加州大学合作， 伯克利 样品将在Crystallume制造，其中立方体 将氮化硼粉末掺入CVD金刚石基体中， 增强韧性。 机械测试将在 北京大学材料科学与矿物工程系 加州伯克利，以检查疲劳和断裂性能。 研究结果将为优化设计提供依据 用于磨损和切削的第二阶段金刚石复合材料显微结构 应用. 这种新材料可以加工成有用的形状 并且将表现出上级硬度、异常韧性和高韧性， 导热系数 一种高韧性的金刚石复合材料将受到人们的极大关注 在磨料磨损和切削工具应用中。 拟议工作 将提供一种新的材料， 并且不需要耐磨涂层。 产品可能 包括工具插入件、轴承元件和结构部件。