Properties of bulk polycrystalline CVD diamond
Identifieur interne : 003186 ( Main/Merge ); précédent : 003185; suivant : 003187Properties of bulk polycrystalline CVD diamond
Auteurs : RBID : ISTEX:C02760355462E70AEDF67FDDD0A41BB7AB59B16EAbstract
Properties are reported of bulk polycrystalline diamond synthesized by chemical vapour deposition (BPCVD diamond). It is shown that this material exhibits optical and thermal properties similar to those of high purity natural Type IIa diamond. The mechanical strength and elastic properties of this material have been measured by a disc-bursting technique and values of bursting strength of up to 1138 MPa and Young's modulus values of 986–1079 GPa have been observed. Indentation measurements indicate a value for fracture toughness K1c of 6MP a m1/2. The dielectric constant and dielectric loss have been measured by an open resonator technique at frequencies of 36, 72 and 144 GHz. Bulk values of dielectric loss tangent as low as 73 × 10−6 have been observed, the lowest so far reported for CVD diamond. The threshold to laser damage has been tested at laser wavelengths of 10.6, 1.06 and 0.532 μm. Damage thresholds are found to be influenced by bulk absorption. However, the best values measured in BPCVD diamond at 10.6 μm approach that of natural Type IIa diamond.
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DOI: 10.1016/0925-9635(94)90176-7
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Properties of bulk polycrystalline CVD diamond</title><author><name sortKey="Sussmann, R S" uniqKey="Sussmann R">R.S. Sussmann</name><affiliation><mods:affiliation>De Beers Industrial Diamond Division, Charters, Sunninghill, Ascot (UK)</mods:affiliation><wicri:noCountry code="subField">Ascot (UK)</wicri:noCountry></affiliation></author><author><name sortKey="Brandon, J R" uniqKey="Brandon J">J.R. Brandon</name><affiliation><mods:affiliation>De Beers Industrial Diamond Division, Charters, Sunninghill, Ascot (UK)</mods:affiliation><wicri:noCountry code="subField">Ascot (UK)</wicri:noCountry></affiliation></author><author><name sortKey="Scarsbrook, G A" uniqKey="Scarsbrook G">G.A. Scarsbrook</name><affiliation><mods:affiliation>De Beers Industrial Diamond Division, Charters, Sunninghill, Ascot (UK)</mods:affiliation><wicri:noCountry code="subField">Ascot (UK)</wicri:noCountry></affiliation></author><author><name sortKey="Sweeney, C G" uniqKey="Sweeney C">C.G. Sweeney</name><affiliation><mods:affiliation>De Beers Industrial Diamond Division, Charters, Sunninghill, Ascot (UK)</mods:affiliation><wicri:noCountry code="subField">Ascot (UK)</wicri:noCountry></affiliation></author><author><name sortKey="Valentine, T J" uniqKey="Valentine T">T.J. Valentine</name><affiliation><mods:affiliation>De Beers Industrial Diamond Division, Charters, Sunninghill, Ascot (UK)</mods:affiliation><wicri:noCountry code="subField">Ascot (UK)</wicri:noCountry></affiliation></author><author><name sortKey="Whitehead, A J" uniqKey="Whitehead A">A.J. Whitehead</name><affiliation><mods:affiliation>De Beers Industrial Diamond Division, Charters, Sunninghill, Ascot (UK)</mods:affiliation><wicri:noCountry code="subField">Ascot (UK)</wicri:noCountry></affiliation></author><author><name sortKey="Wort, C J H" uniqKey="Wort C">C.J.H. Wort</name><affiliation><mods:affiliation>De Beers Industrial Diamond Division, Charters, Sunninghill, Ascot (UK)</mods:affiliation><wicri:noCountry code="subField">Ascot (UK)</wicri:noCountry></affiliation></author></titleStmt><publicationStmt><idno type="RBID">ISTEX:C02760355462E70AEDF67FDDD0A41BB7AB59B16E</idno><date when="1994">1994</date><idno type="doi">10.1016/0925-9635(94)90176-7</idno><idno type="url">https://api.istex.fr/document/C02760355462E70AEDF67FDDD0A41BB7AB59B16E/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">001211</idno><idno type="wicri:Area/Istex/Curation">001211</idno><idno type="wicri:Area/Istex/Checkpoint">002771</idno><idno type="MainMerge">002771</idno><idno type="wicri:Area/Main/Merge">003186</idno></publicationStmt><seriesStmt><idno type="ISSN">0925-9635</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="eng">Properties are reported of bulk polycrystalline diamond synthesized by chemical vapour deposition (BPCVD diamond). It is shown that this material exhibits optical and thermal properties similar to those of high purity natural Type IIa diamond. The mechanical strength and elastic properties of this material have been measured by a disc-bursting technique and values of bursting strength of up to 1138 MPa and Young's modulus values of 986–1079 GPa have been observed. Indentation measurements indicate a value for fracture toughness K1c of 6MP a m1/2. The dielectric constant and dielectric loss have been measured by an open resonator technique at frequencies of 36, 72 and 144 GHz. Bulk values of dielectric loss tangent as low as 73 × 10−6 have been observed, the lowest so far reported for CVD diamond. The threshold to laser damage has been tested at laser wavelengths of 10.6, 1.06 and 0.532 μm. Damage thresholds are found to be influenced by bulk absorption. However, the best values measured in BPCVD diamond at 10.6 μm approach that of natural Type IIa diamond. </div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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