Machining of High Hardness Materials Using Laser Induced Thermo-chemical Reaction in High Affinity Atmosphere

本研究的目的是开发利用铁粉中的热化学反应，通过激光加热去除单晶金刚石的工艺。在与铁粉接触的钻石表面通过石墨化过程去除钻石。实验考察了金刚石的去除体积以及铁粉用量、激光功率和激光照射时间等加工条件对金刚石去除体积的影响。用扫描显微镜和电子探针对铁粉反应后的粉末进行了分析。推测金刚石是在与铁粉接触的表面直接转移到石墨中的。在本研究工作中，还利用铁和玻璃的切割工艺加工了一颗蓝宝石。

The purpose of this study is to develop the removal processing of a single crystal diamond using thermo-chemical reaction in iron powder by heating with a YAG laser. The diamond is removed by the graphitized process at the surface of the diamond contacted with the iron powder. The experiments examined the removed volumes of the diamonds and the influence of the processing conditions such as the volume of iron powder, the laser beam power, and the laser irradiation time. The powder after reacting with the iron powder were analyzed by a scanning microscope and an electron probe microanalysis. It is deduced that the diamond transfered to the graphite directly at the surface contacted with the iron powder. And a sapphire was also machined using cutting process with iron and glass in this research work.