SURFACE MODIFICATION FOR MACHINABILITY AND PERFORMANCE

表面改性以提高可加工性和性能

• 批准号: 6238556
• 负责人: ISABEL K LLOYD
• 金额: $ 12.5万
• 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: 1997
• 资助国家: 美国
• 起止时间: 1997-07-01 至 1998-06-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6238556
• 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.

脆性材料的加工传统上是缓慢、昂贵和 容易造成表面损坏，降低强度和耐用性 一辈子。这项计划的目标是(1)加强 牙科陶瓷的可加工性 去除材料，减少加工和加工过程中造成的损坏 进一步(2)通过化学回火，通过以下方式提高临床成功率 提高强度和疲劳寿命，同时减少磨损。两部小说 将探索机械加工概念以创建这些增强； 在化学活性高温熔池中加工，并用 原位化学回火。将调查四个具体目标：(1) 研究高温加工以提高效率 机械加工，(2)在高加工条件下加工过程中的化学反应 温度盐浴，促进材料的高效率与低 表面损伤，(3)确定选定的化学回火效果 表面完整性、疲劳强度和磨损联合的方法 项目1、2和3以及(4)结合了化学回火和 高温加工成单道工序。