SURFACE MODIFICATION FOR MACHINABILITY AND PERFORMANCE

表面改性以提高可加工性和性能

• 批准号: 6104885
• 负责人: ISABEL K LLOYD
• 金额: $ 19.71万
• 依托单位: UNIV OF MED/DENT OF NJ-NJ MEDICAL SCHOOL
• 依托单位国家: 美国
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-07-01 至 2002-06-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6104885
• 关键词: biomaterial development /preparation; biomaterial evaluation; ceramics; dental material wear; dental materials; heat; physical property; surface property; tensile strength

Machining of brittle materials has traditionally been slow, expensive, and prone to creating surface damage, decreasing strength and service lifetime. The objective of this project is to (1) enhance the machinability of dental ceramics in terms of both increasing the rate of material removal and decreasing the damage incurred during machining and further to (2) via chemical tempering, increase clinical success by increasing strength and fatigue life while decreasing wear. Two novel machining concepts will be explored to create these enhancements; machining in a chemically active high-temperature bath and machining with in-situ chemical tempering. Four specific aims will be investigated: (1) investigate high-temperature machining to increase the efficiency of machining, (2) tailor chemical reactions during machining in a high- temperature salt bath to promote high material removal rates with low surface damage, (3) determine the effect of selected chemical tempering methods on surface integrity, fatigue strength, and wear in conjunction with Projects 1, 2, and 3, and (4) incorporate chemical tempering and high-temperature machining into a single process.

脆性材料的机械加工传统上是缓慢、昂贵且昂贵的。 容易造成表面损坏，降低强度和使用寿命 辈子 本项目的目标是：（1）加强 牙科陶瓷的机械加工性， 材料去除和减少加工过程中产生的损坏， 除了（2）通过化学回火，通过以下方式提高临床成功率： 增加强度和疲劳寿命，同时减少磨损。 两种新型 将探讨加工概念，以创建这些增强功能; 在化学活性高温浴中加工， 原位化学回火。 本研究将探讨四个具体目标：（1） 研究高温加工以提高 机械加工，（2）在高- 温度盐浴，以促进高材料去除率， 表面损伤，（3）确定选定的化学回火效果 关于表面完整性、疲劳强度和磨损的方法 项目1、2和3，以及（4）采用化学回火， 高温加工成一个单一的过程。