根据材料对Nd-YAG激光具有不同的吸收率；激光熔覆与快速凝固技术的特点；碳纳米管（CNT）优良的机械性能及其在复合材料中的增强补韧特点； 同时为了消除激光熔覆过程中产生的热应力，防止裂纹的出现，设计了添加一定含量Ti粉末的梯度熔覆层，以价格便宜、方便易得的CaHPO4.2H2O与CaCO3为原材料，通过湿法球磨引进CNT，利用Nd-YAG激光熔覆技术原位合成CNT增强的HAP生物陶瓷涂层。研究原材料成分、生物陶瓷涂层组织结构与性能的相关性与影响规律，针对生物陶瓷涂层物相形成与控制、化学冶金结合界面组织与强度、组织结构与力学性能、生物相容性等进行深入研究，揭示其内在机理；探讨激光熔覆制备生物陶瓷涂层的反应机理与快速凝固理论。本申请具有重要的理论研究意义与实际应用价值, 不仅可以推动激光熔覆制备CNT增强HAP涂层的应用与理论研究，而且可以促进CNT生物材料在制备、性能与机理研究上的系统性。

According to the different absorptivity of different materials towards Nd-YAG laser, the characteriation and merits of the laser cladding and rapid solidification technology, and the excellent mechnical properties of CNT and its strengthening and toughening in the composite materials; In the same time to avoid the thermal stress and the occurrence of the cracks, a gradient transition layer with a certain content Ti powders incorported is designed. With the cheap and abundant CaHPO4?2H2O and CaCO3 being the raw materials and the introduction of the CNT by wet ball milling, the CNT reinforced HAP bioceramic composite coating was in situ fabricated by Nd-YAG laser cladding. According to the phase formation and controlling, chemical and metallurgical bonding interface microstructure and strength, microstructure and mechanical properties, and in depth study of the biocompatibility, research on the composition of raw materials, correlation and effection law between bioceramic coating microstructure and performance reveals its inner mechanism and effect of law; laser cladding fabrication of bioceramic coating reaction mechanism and rapid solidification theory. This application has important theoretical significance and practical value, can not only promote the laser cladding fabrication CNT reinforced HAP coating application and theoretical research, but also can promote the system research on preparation, properties and mechanism of carbon nanotube composite biomaterial.