强脉冲离子束的产生及其表面处理新技术

The surface modification of materials by intense pulsed ion beam (IPIB) is a new ion beam modification technology. Excepting ion doping effects, the thermodynamic effects induced by the energy deposition are more promising as a powerful tool for the surface modification of materials, since there could be the "super-range effects" and the high availability of ion dose and energy. By means of this project, we have made a series of basic studies on intense pulsed energy effects, thermodynamic process and crater phenomena on the metallic surface irradiated by IPIB and construction of planar magnetically insulated ion (PMID) diode to get homogenous IPIB with a large beam size. The modification of microstructure, morphology and service property on the surface irradiated by IPIB for 45# steel and Ni3Al based alloy IC6 have been studied. Computer simulations of the PMID producing IPIB and the thermodynamical process in metal surface induced by IPIB have been emphasized and developed. A PMID to get homogenous IPIB with a large beam size, a Thompson spectroscopy to analyze IPIB, Faraday Cups to measure the distribution of IPIB and a PVDF detector to measure the stresses due to the irradiation of IPIB have been designed. It would be a solid base for us to enter a new phase to develop the IPIB technology.

研究磁绝缘离子二极管产生脉宽50-100ns、电压100-250KV、电流密度10-100A/cm2、脉冲流强1-10KA的高功率脉冲离子束技术；不同功率密度、能量密度的强脉冲离子束辐照金属表面的超快能量沉积效应对材料结构玉物性影响规律；强脉冲离子束辐照工艺适用范围及相应装置技术与要求。对发展高功率离子脉冲辐照源及新一代洁净节能廉价离子束工艺有重要意义。