The toughness of free-standing CVD diamond

A. R. Davies; J. E. Field; K. Takahashi; K. Hada

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The toughness of free-standing CVD diamond

机译：独立式CVD金刚石的韧性

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A four-point bend test was used to determine the fracture toughness of mechanical grade and di-electric (optical) grade chemical vapour deposited (CVD) diamond. The validity of the test was first confirmed by measuring the toughness of alumina and confirming the results with literature values. The toughnesses of both types of CVD were similar; 8.5 ± 1.0 and 8.3 ± 0.4 MPa $sqrt m $ respectively. This is higher than the value of 3 4 ± 0 5 MPa $sqrt m $ measured for good quality natural diamond by Field and Freeman, [1] using an indentation technique. It is suggested that this is primarily due to differences in surface roughness. There were enough samples to make a preliminary study of the effect of temperature and these data are reported.

机译：使用四点弯曲试验确定机械级和介电（光学）级化学气相沉积（CVD）金刚石的断裂韧性。首先通过测量氧化铝的韧性并用文献值确认结果来确认测试的有效性。两种类型的CVD的韧性均相似。分别为8.5±1.0和8.3±0.4 MPa $ sqrt m $。这高于Field和Freeman [1]使用压痕技术为优质天然钻石测得的3 4±0 5 MPa $ sqrt m $的值。建议这主要是由于表面粗糙度的差异。有足够的样本可以对温度的影响进行初步研究，并报告了这些数据。

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《Journal of Materials Science》 |2004年第5期|1571-1574|共4页
作者
A. R. Davies; J. E. Field; K. Takahashi; K. Hada;
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Cavendish Laboratory Department of Physics University of Cambridge;

Cavendish Laboratory Department of Physics University of Cambridge;

Japan Atomic Energy Research Institute (JAERI);

Japan Atomic Energy Research Institute (JAERI);

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1. The toughness of free-standing CVD diamond [J] . Davies AR., Field JE., Takahashi K., Journal of Materials Science . 2004,第5期

机译：独立式CVD钻石的韧性
2. The 8-inch free-standing CVD diamond wafer fabricated by DC-PACVD [J] . Ki-Woong Chae, Young-Joon Baik, Jong-Keuk Park, Diamond and Related Materials . 2010,第10期

机译：通过DC-PACVD制造的8英寸独立式CVD金刚石晶片
3. Thermal conductivity of free-standing CVD diamond films by growing on both nuclear and growth sides [J] . Dai Bing, Zhao Jiwen, Ralchenko Victor, Diamond and Related Materials . 2017,第期

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4. Preliminary measurements and assessment of strength and fracture toughness in free-standing CVD diamond for high-speed missile domes [C] . John M. Trombetta, Texas Instruments Inc., Dallas, Window and Dome Technologies and Materials III . 1992

机译：高速导弹圆顶独立式CVD金刚石的初步测量和强度和断裂韧性评估
5. Analytical and experimental studies on microwave assisted CVD diamond coatings on silicon nitride and cemented tungsten carbide tools and growth of polycrystalline diamond on several transition metals [D] . Kamarajugadda, Mallika 1998

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6. A wear simulation study of nanostructured CVD diamond-on-diamond articulation involving concave/convex mating surfaces [O] . Paul A. Baker, Raymond G. Thompson, Shane A. Catledge -1

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7. Quantitative determination of the adhesive fracture toughness of CVD diamond to WC-Co cemented carbide [O] . Kamiya S, Takahashi H, Polini R, 2000

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The toughness of free-standing CVD diamond

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