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Nanostructured apatites grown by laser floating zone
摘要： Apatites (AP) ceramics are important due to their application in the orthopaedics field as bioceramic material. Several processes to produce apatites such as oxyapatite (OAP) and hydroxyapatite (HA) materials are used to apply as a temporary substitute for human bone. In the present work, AP powders were prepared by high-energy ball milling and then by laser floating zone (LFZ) technique to transform into a dense cylinder (fibre). The effect of LFZ processing conditions was assessed by structural and electric characterization. Fibres present strong densification and a uniform polycrystalline microstructure, which could favour the use for natural bone treatments and as bio-sensors. However, further work must be assessed to optimize laser processing conditions.
关键词： Bioceramic,Apatites,Laser floating zone,Bio-sensors,Bone treatment,Hydroxyapatite,Oxyapatite
更新于2025-09-23 15:21:01
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Multi-objective Optimization of Nanosecond Pulsed Laser Microgrooving of Hydroxyapetite Bioceramic
摘要： This paper presents an experimental study of laser microgrooving on the surface of Hydroxyapetite in its pure form with low power nanosecond pulsed Nd:YAG laser. The laser grooving parameters, namely Lamp current, pulse frequency, assist air pressure, and cutting speed are optimized with respect to overcut and groove depth which are chosen as machining responses. Taguchi methodology for four factors at three levels is used here for the implementation of experiments. Grey relational analysis (GRA) is applied to convert the multiple quality characteristics to a single performance characteristic called grey relational grade from where optimal process parameters are determined. Analysis of variance is carried out to identify the most significant factor for the overall quality characteristics of the laser grooving process. Results of confirmation experiments indicate at the application feasibility of the Taguchi based grey technique for laser grooving quality of bioceramics in the medical industry.
关键词： Laser grooving,Grey relation analysis (GRA),Groove depth,Hydroxyapetite bioceramic,OverCut,Taguchi method
更新于2025-09-16 10:30:52