Fractional deposition: Enhancing the bond strength between diamond-like carbon with high sp3/sp2 ratio and alumina

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

Diamond and Related Materials Pub Date : 2025-04-16 DOI:10.1016/j.diamond.2025.112345

Zhengjie An, Junping Zhao, Sheng Lin, Jiamin Fu, Richeng Wang, Zhijun Ai, Qiaogen Zhang

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Abstract

To enhance the thermal conductivity of epoxy composites, it is proposed to deposit diamond-like carbon (DLC) with strong bonding and a high sp3/sp2 ratio on the surface of filler particles. When plasma-enhanced chemical vapor deposition (PECVD) is employed, there exists a discrepancy between the optimal ion energy range for maximizing the DLC film's sp3/sp2 ratio and the bond strength between DLC and alumina. Parameter optimization methods cannot simultaneously optimize both properties. This paper introduces a fractional deposition approach. Specifically, by selecting the corresponding optimal parameters during the initial and prolonged deposition stages, this method ensures that the DLC film exhibits both a high sp3/sp2 ratio and excellent adhesion to alumina. The growth process of DLC on the alumina surface was investigated, revealing that the limited ion energy range is the rationale behind the phased regulation method. Compared to the conventional approach, the fractional deposition method enhances the bonding strength between DLC films with a high sp3/sp2 ratio and alumina substrates by approximately 48 %. This approach is anticipated to expand the application scope of DLC deposition technology.

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分级沉积：提高高sp3/sp2比类金刚石碳与氧化铝的结合强度

为了提高环氧复合材料的导热性，提出在填料颗粒表面沉积具有强结合力和高sp3/sp2比的类金刚石碳（DLC）。当采用等离子体增强化学气相沉积（PECVD）时，使DLC膜sp3/sp2比最大化的最佳离子能量范围与DLC与氧化铝的结合强度之间存在差异。参数优化方法不能同时优化这两个属性。本文介绍了一种分数沉积方法。具体来说，通过在初始和延长沉积阶段选择相应的最佳参数，该方法确保DLC膜具有高sp3/sp2比和优异的氧化铝附着力。研究了DLC在氧化铝表面的生长过程，揭示了有限的离子能量范围是相控调节方法背后的基本原理。与传统方法相比，分数沉积方法将具有高sp3/sp2比的DLC薄膜与氧化铝衬底之间的结合强度提高了约48%。该方法有望扩大DLC沉积技术的应用范围。

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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.