Synthesis of multifunctional microdiamonds on stainless steel substrates by chemical vapor deposition
Synthesis of multifunctional microdiamonds on stainless steel substrates by chemical vapor deposition
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DOI：
10.1016/j.carbon.2020.09.064
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发表时间：
2021
期刊：
影响因子：
10.9
通讯作者：
P. Joshi;A. Haque;A. Haque;Siddharth Gupta;Siddharth Gupta;R. Narayan;J. Narayan
中科院分区：
文献类型：
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作者：
P. Joshi;A. Haque;A. Haque;Siddharth Gupta;Siddharth Gupta;R. Narayan;J. Narayan
报道了用化学气相沉积(CVD)在304和316奥氏体不锈钢(SS)衬底上合成多功能微金刚石的方法。通过表面划痕和超致密的Q-C结构提高了润湿性，获得了较高的形核密度和最小的金刚石薄膜应变。值得注意的是，这些金刚石薄膜显示出大量的孪晶，导致形成五重微钻石。在有划痕的SS衬底和Q-C中间层上，金刚石的半高宽分别为8.25亿cm−1和11.5x cm−1，而裸SS衬底上的金刚石半宽为26亿cm−1。生长在裸SS衬底上的金刚石薄膜由于高达2.3 Gpa的拉应力而出现开裂，这归因于SS与金刚石之间的热失配。电子背散射衍射研究表明，在裸SS衬底上合成的金刚石中存在铁包裹体，这可能会在这些金刚石中产生铁磁性。与使用铁磁性离子的离子束注入方法相比，这种方法产生了更好的样品。在800℃时，1012Fe原子/cm2从SS衬底转移到金刚石中。这些CVD金刚石的主要生长方向是平面外的<；110>；这些多功能微钻石在生物医学、电子和摩擦学应用中非常有用。
We report on the synthesis of multifunctional microdiamonds by chemical vapor deposition (CVD) on 304 and 316 austenitic stainless steel (SS) substrates. The increase in wettability achieved by surface scratching and the structure of ultra-dense Q-carbon achieved high nucleation density and minimized strains in diamond films. Notably, these diamond films exhibit a high amount of twinning, leading to the formation of five-fold microdiamonds. The diamonds on scratched SS substrate and Q-carbon interlayer exhibit a full width at half maximum of 8.25 cm−1and 11.5 cm−1, compared to 26 cm−1on bare SS substrate. The diamond films grown on bare SS substrate exhibited cracking due to high tensile stress of 2.3 GPa, ascribed to thermal mismatch between SS and diamond. The electron backscattered diffraction investigations reveal iron inclusions in diamonds synthesized on bare SS substrates, which may create ferromagnetism in these diamonds. This route, compared to the ion beam implantation method using ferromagnetic ions, yields better samples. At 800 °C, 1012Fe atoms/cm2s are transferred from the SS substrate into the diamonds. The dominant growth orientation for these CVD diamonds was determined to be <110> out of plane. These multifunctional microdiamonds are useful for biomedical, electronic, and tribological applications.