ICF磷酸盐激光玻璃的机械化学耦合材料微观去除机理研究

项目名称： ICF磷酸盐激光玻璃的机械化学耦合材料微观去除机理研究

项目编号： No.51205330

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 机械工程学科

项目作者： 余家欣

作者单位： 西南科技大学

项目金额： 25万元

中文摘要： 作为惯性约束核聚变（ICF）的主要激光放大介质，磷酸盐激光玻璃虽然已采用磁流变抛光来实现表面平坦化，但目前的抛光质量较低，这已成为制约ICF实现点火的关键技术难题。本项目从磁流变抛光中单个纳米磨粒和工件的相互作用入手，系统开展磷酸盐激光玻璃的机械化学耦合微观去除机理研究。研究拟首先采用纳米划痕仪和原子力显微镜分别在介观和微观尺度，研究载荷、速度、粒径等系统因素对磷酸盐激光玻璃单点磨损的影响规律，揭示其材料跨尺度机械性去除机理。然后，通过环境可控的原子力显微镜模拟磁流变抛光的工艺条件，研究大气湿度、纯水、添加剂溶液以及不同磨粒材质等外界因素对材料去除的影响规律，阐明其摩擦化学反应机理。最后，总结影响磷酸盐激光玻璃材料去除的主要影响因素，针对性提出相关工艺改进措施，并在磁流变抛光机上加以验证。该课题研究成果不仅有助于磷酸盐玻璃抛光质量的提升，也能为丰富微纳摩擦学和超精密加工的基础理论做出贡献。

中文关键词： 磷酸盐玻璃；摩擦化学；微观磨损；应力腐蚀；水

英文摘要： ， Phosphate laser glasses, as the main core material of the amplifier using in inertial confinement fusion (ICF) high power solid-state lasers, usually are polished through magnetorheological finishing technology, but so far, the poor surface quality of phosphate laser glass after polishing still can not satisfy the requirement of ICF experiment, which has become a key technology difficulty to restrict the further development of ICF technology. On the basis of the interaction between single nano-particle in magnetorheological finishing fluid and optic element, the mechanical-chemical coupled material microremoval mechanism of phosphate laser glasses will be systematically investigated in this work. With nanoscratch and atomic force microscopy, the effects of normal load, shearing velocity, and size of nano-particle on the material removal of phosphate laser glasses will be addressed in mesoscopic and microscopic scale, and the material cross-scale removal mechanism will be expounded. Additional, in order to simulate the technological conditions of magnetorheological finishing, through an atomic force microscopy equipped with an environment chamber and fluid scanning module, the effects of environment humidity, pure water, solution with additives, and the material of nano-particle on the material removal of phosp

英文关键词： Phosphate glass；Tribochemistry；Microwear；Stress-corrosion；Water