Iron etching of diamond in hydrogen-free atmosphere
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摘要: 用铁粉在无流动氢气气氛下催化刻蚀金刚石。用扫描电子显微镜(SEM)、激光探针分析仪以及X射线衍射仪表征其表面形貌、刻蚀坑深度和刻蚀后金刚石的结构和成分,同时对金刚石的刻蚀行为进行分析。结果表明:在无氢气气氛下,铁粉通过其催化作用刻蚀金刚石晶体;刻蚀主要在金刚石的{111}、{100}面进行,且{100}面的刻蚀速率大于{111}面的,其刻蚀机制是通过铁-金刚石间形成Fe-C相实现的;且刻蚀受铁相含量影响,刻蚀后金刚石结构不变。Abstract: Diamond surface was etched by iron powder in hydrogen-free atmosphere. Scanning electron microscopy (SEM), laser probe analyzer (LPA) and X-ray Diffractometer (XRD) were used to characterize the surface morphology, pit depth, structure and composition of the etched diamond. The etching behavior of diamond was also analyzed.The results show that iron powder can etch diamond crystals through its catalysis in hydrogen-free atmosphere. The etching is mainly carried out on {111} and {100} surfaces of diamond, and the etching rate of {100} surfaces is higher than that of {111} surfaces. The etching mechanism is realized by the formation of Fe-C phase between iron and diamond. The etching is influenced by the content of iron phase and the structure of diamond remains unchanged after etching.
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Key words:
- diamond etching /
- Fe-C /
- anisotropy
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