The effect of Ni on the growth of type-IIa diamonds

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

Diamond and Related Materials Pub Date : 2025-02-20 DOI:10.1016/j.diamond.2025.112132

Ziyi Liu , Fuming Deng , Xiaozhou Chen , Jun Ma , Xiaotian Xing , Houzhen Chen , Wenli Deng , Yan Wang , Junzhe Yu , Can Li , Rui Wang , Zhengpeng Li

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Abstract

Diamonds are renowned for their invaluable properties and extensive applications. Among these, Type-IIa diamonds are regarded as the most prized due to their exceptional quality, though their rarity in nature has led to significant interest in their synthetic replication. This study employs the high-pressure and high-temperature method to synthesize high-quality Type-IIa diamond crystals. However, this method is susceptible to the formation of cracks during the growth process due to the rapid growth rate, the differing coefficients of thermal expansion, and the shear force during depressurization. These factors impede the synthesis of high-purity Type-IIa diamonds. To address these challenges and enhance the crystal quality, this paper proposes the incorporation of a specific amount of Ni (flake) into the plugging material. Through the use of a temperature cloud field simulation, it has been demonstrated that Ni has a positive effect on the low stabilization of diamond growth temperature. This assertion has been verified by actual synthesis. Furthermore, a series of physical characterizations have been performed, which have demonstrated that the addition of Ni has a high promotion effect on the synthesis of high-quality type-IIa diamonds.

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钻石以其无价的特性和广泛的用途而闻名于世。其中，Type-IIa 型钻石因其卓越的品质而被视为最珍贵的钻石，但由于其在自然界中的稀有性，人们对其合成复制产生了浓厚的兴趣。本研究采用高压高温法合成高质量 IIa 型金刚石晶体。然而，由于生长速度快、热膨胀系数不同以及减压时的剪切力，这种方法在生长过程中容易形成裂缝。这些因素阻碍了高纯度 IIa 型金刚石的合成。为了应对这些挑战并提高晶体质量，本文提出在堵塞材料中加入一定量的镍（片状）。通过使用温度云场模拟，证明了镍对低稳定金刚石生长温度有积极作用。实际合成验证了这一论断。此外，还进行了一系列物理特性分析，结果表明添加镍对合成高质量 IIa 型金刚石有很大的促进作用。

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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.