激光技术制备生物陶瓷涂层的研究现状与展望

Applications of Laser Technologies in Synthesis and Surface Modification of Bioceramic Composite Coatings

羟基磷灰石等生物陶瓷材料具有优良的生物相容性和生物活性,但其强度较低的力学性能限制了其广泛应用。在综合力学性能优良,生物活性有限的医用钛合金表面制备生物陶瓷涂层,能够扬长避短,充分发挥二者的优点,具有巨大的市场与应用价值,是国内外的研究热点。利用激光技术改性或制备生物陶瓷涂层,主要有以下几个领域的应用与研究:激光表面熔凝与其他涂层技术相结合;脉冲激光沉积法;激光熔覆等方法。本文全面阐述了国内外激光表面改性生物陶瓷涂层的研究现状与研究进展,并对其工艺与理论发展进行了展望。

The applications of laser technologies in synthesis and surface-modification of bio-ceramics composite coating materials,especially hydroxyapatite（ HAP） on substrate of biomedical Ti-alloys,were tentatively reviewed. The discussions focused on i） the laser technologies in growth and surface modification of HAP thick films deposited by plasma-jet spray coating,including but not limited to the laser surface melting of HAP and Ti-alloy substrate,laser-assisted laser ablationdeposition（ LALA）,pulsed laser deposition（ PLD） and laser cladding; ii） the growth mechanisms,optimized growth conditions and characterization of surface and interface properties,particularly biocompatibility,of the HAP grown by PLD; iii） the existing problems of the plasma-jet spray coated HAP thin films in clinic applications,including its poor mechanical behavior. In addition,the development trends and possible solutions to the limitations of HAP materials,such as laser melting / rapid solidification and strengthening with carbon nano-tubes（ CNTs）,were also discussedin a thought provoking way.