Adhesion of nanodiamond seeded CVD diamond on ceramic substrate
Adhesion of nanodiamond seeded CVD diamond on ceramic substrate
复制标题
纳米金刚石晶种 CVD 金刚石在陶瓷基材上的附着力
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
D. Lim
中科院分区：
文献类型：
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作者：
Min;Jong;Seung Koo Lee;Y. Oh;D. Lim
利用热丝CVD系统在常规结构陶瓷基体上镀覆了1 μm厚的多晶CVD金刚石层，并进行了测试。选择的衬底是硅酸盐、氧化铝、氮化硅和碳化硅陶瓷。为了获得高的成核密度并提高金刚石与陶瓷基体之间的附着力，使用了新开发的纳米金刚石静电自组装（ESAND）引晶方法。这种播种方法引发晶体金刚石的生长。对于该接种程序，每个带负电荷的基底表面覆盖有阳离子聚合物单层。接着，通过静电自组装过程将阴离子聚合物涂覆的阳离子纳米金刚石颗粒附着到基底上。通过微划痕试验研究了金刚石膜与每个衬底之间的粘附程度。这些测试涉及使用Rockwell C压头（r = 0.2mm），其在渐进法向载荷（从0到21 N）下以10 mm/min的速度刮擦样品。利用拉曼光谱分析了不同衬底上的多晶金刚石膜的形貌。
Conventional structural ceramic substrates were coated with 1 μm thick polycrystalline CVD diamond layer by using the hot filament CVD system and subsequently tested. The substrates chosen were silicate, alumina, silicon nitride, and silicon carbide ceramics. To achieve a high nucleation density and to improve the adhesion between the diamond and the ceramic substrate, the newly developed Electrostatic Self-Assembly of Nano Diamond (ESAND) seeding method was used. This seeding method initiates the growth of crystalline diamond. For this seeding procedure, each negatively charged substrate surface was covered with a cationic polymer monolayer. Next, anionic polymer coated cationic nanodiamond particles were attached to the substrate by the electrostatic self-assembly process. The degree of adhesion between the diamond film and each substrate was investigated by micro-scratch testing. These tests involved the use of a Rockwell C indenter (r = 0.2 mm), which scratched the samples at a speed of 10 mm/min under a progressive normal load (from 0 to 21N). The morphology of the poly-crystalline diamond films on the various substrates was analyzed using Raman spectroscopy.