In-situ Formation of NbC Reinforced Ni3Si Intermetallic Compounds by Laser Cladding

摘要：

　　Laser cladding technique was used to form Ni3Si intermetallic composite coating reinforced by in-situ formation NbC particles on Ni-based superalloy substrate.The process parameters were optimized to obtain cladding.The effect of Nb-C addition to the microstructure of the coating was investigated.The morphology of reinforcement particles was discussed.The experimental results showed that an excellent bonding between the coating and the substrate was ensured by a strong metallurgical interface.The clad coating was very good and free from cracks and pores.The microstructure of the coating was mainly composed of Ni(Si),Ni3(Si,Nb) and NbC.The NbC particles were formed by in-situ reaction between Nb and C during laser cladding process.NbC particles were homogeneously distributed in the composite material.Moreover,the maximum size of NbC particles was more than 4 μm.

关键词： Laser cladding Niobium carbide Microstructure

作者: Yao-ning Sun Ding Fan Yu-feng Zheng Min Zheng Jian-bin Zhang

作者单位: State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials,Lanzhou University of Technology, State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials,Lanzhou University of Technology,

会议类型: 国际会议

会议名称: The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))

会议地点: 长沙

会议语种:英文

页码: 1351-1353

在线出版日期: 2007-05-10（万方平台首次上网日期，不代表论文的发表时间）