Morphological transformation of impact diamond crystals after interaction with metal melt at high pressure and high temperature

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials Pub Date : 2025-04-26 DOI:10.1016/j.diamond.2025.112377

A.A. Chepurov , E.I. Zhimulev , E.O. Barabash , S.V. Goryainov , S.A. Gromilov , V.M. Sonin , I.A. Gryaznov , V.P. Afanasiev , A.I. Chepurov , A.I. Turkin

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Abstract

The aim of the present experiment is to study the morphological transformation of impact diamond crystals after interaction with metal melt at high pressure and high temperature (HPHT). As initial samples, near colorless flattened impact diamond crystals from the Popigai astrobleme (Yakutia) were selected. The experiments were performed using a split-sphere multi-anvil high-pressure apparatus at 6 GPa and 1450°С, which correspond to a diamond stability field. It was found that at the HPHT conditions a contact of lonsdaleite-bearing diamond with NiFe melt leads to the formation of complex layered textures which are a combination of dissolution of impact diamond and growth of a cubic diamond phase. The textures gradually transform into an aggregate of microcrystals in a subparallel orientation. The obtained results are substantial for the development of abrasive tools at HPHT conditions using impact diamonds.

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高压高温下冲击金刚石晶体与金属熔体相互作用后的形态变化

本实验的目的是研究冲击金刚石晶体在高压高温下与金属熔体相互作用后的形态转变。作为初始样本，我们选择了来自波皮盖星坑（雅库特）的近乎无色的扁平撞击钻石晶体。实验采用裂球多砧高压实验装置，温度为6 GPa，温度为1450°С，对应于金刚石稳定场。结果表明，在高温高温条件下，含lonsdaleite的金刚石与NiFe熔体接触，形成复杂的层状织构，这是冲击金刚石溶解和立方金刚石相生长的结合。织构逐渐转变为亚平行取向的微晶聚集体。所得结果对利用冲击金刚石开发高温条件下的磨具具有重要意义。

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来源期刊

Diamond and Related Materials 工程技术-材料科学：综合

CiteScore

6.00

自引率

14.60%

发文量

702

审稿时长

2.1 months

期刊介绍： DRM is a leading international journal that publishes new fundamental and applied research on all forms of diamond, the integration of diamond with other advanced materials and development of technologies exploiting diamond. The synthesis, characterization and processing of single crystal diamond, polycrystalline films, nanodiamond powders and heterostructures with other advanced materials are encouraged topics for technical and review articles. In addition to diamond, the journal publishes manuscripts on the synthesis, characterization and application of other related materials including diamond-like carbons, carbon nanotubes, graphene, and boron and carbon nitrides. Articles are sought on the chemical functionalization of diamond and related materials as well as their use in electrochemistry, energy storage and conversion, chemical and biological sensing, imaging, thermal management, photonic and quantum applications, electron emission and electronic devices. The International Conference on Diamond and Carbon Materials has evolved into the largest and most well attended forum in the field of diamond, providing a forum to showcase the latest results in the science and technology of diamond and other carbon materials such as carbon nanotubes, graphene, and diamond-like carbon. Run annually in association with Diamond and Related Materials the conference provides junior and established researchers the opportunity to exchange the latest results ranging from fundamental physical and chemical concepts to applied research focusing on the next generation carbon-based devices.