Surface Nitridation of Molybdenum by Laser-promoted Reaction

作     者：WU Jiada WU Changzheng ZHONG Xiaoxia SONG Zhoumo LI Fuming(Department of Physics, Fundan University, Shanghai 200433)(Deprtment of Applied Physics, Northwestern Polytechnical University, Xi'an 710072, China) 

作者机构：Fudan Univ Shanghai China 

出 版 物：《Chinese Journal of Lasers》 (中国激光(英文版))

年 卷 期：1997年第B6卷第2期

页      面：161-168页

核心收录：

学科分类：080503[工学-材料加工工程] 080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0803[工学-光学工程] 

主　　题：laser-promoted reaction laser heating and melting surface nitridation 

摘      要：Experimental results are reported about the surface nitridation of molyly denum by repeated pulsed laser irradiation on molyboenum foils in pure nitrogen atmosphere. In this laser treatment, the laser irradiation activates nitrogen and melts Mo surface, initating a nitridation reaction in liquid phase. The obtained nitride layers were analyzed and characterized by scanning electron micrography, Auger electron spectroscopy and X -ray diffraction. It is found that the nitride layers contain γ-Mo2N phase and have microstructure much denser than that of the original material. Surface heating and melting and transicnt shock waves induced by laser pulses could account for the microstructure densification of the nitride layers.