Diamond fibres by a hot filament CVD process

Griffith, P.W.; Wisbey, A.; Shatwell, R.A.; Ubhi, H. S.; Meaden, G.; Loader, Chris

doi:10.1016/s0925-9635(96)00673-5

Cited by 5 publications

(2 citation statements)

References 10 publications

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“…The principles of diamond ®bre fabrication by hot-®lament chemical vapour deposition (HFCVD) are discussed in detail elsewhere [21,22]. For this investigation, diamond was deposited onto 50 mm tungsten wires, using a mixture of 0.85 per cent methane in hydrogen gas at 20 torr (4 kPa) pressure with a total owrate of 200 sccm (standard cubic centimetres per minute).…”

Section: Manufacture Of Diamond Fibre Grinding Wheelsmentioning

confidence: 99%

The ductile grinding of glass using diamond fibres oriented radially in a grinding wheel

Smith

Smith²,

Pearce

et al. 2003

Proceedings of the Institution of Mechanical Engineers, Part B:

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Diamond-coated ®bres, produced by a hot ®lament chemical vapour deposition technique and having a high facet density, have been prepared for use as abrasives. Two grinding wheels containing such ®bres have been fabricated with the ®bres placed in a radial orientation. One wheel contained a single ®bre, the other contained multiple ®bres. The single diamond ®bre wheel was used ®rst to evaluate the potential for ductile grinding of BK7 glass. A ductile±brittle transition was found, occurring at a depth of cut of ¹1 mm over a range of feed rates (5±50 mm/s). The multiple diamond ®bre wheel was then used to grind an area, using parameters identi®ed by the single ®bre tests. Microstructural analysis revealed that material removal was predominantly in the ductile mode.

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Section: Manufacture Of Diamond Fibre Grinding Wheelsmentioning

confidence: 99%

The ductile grinding of glass using diamond fibres oriented radially in a grinding wheel

Smith

Smith²,

Pearce

et al. 2003

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…Diamond fibres are produced by a CVD technique in which a mixture of 0.85% methane in hydrogen gas is passed over a wire at 900°C [1,2]. Diamond is deposited onto the wire and the resulting crystal structure is shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Performance and Wear Behaviour of Diamond Fibre Grinding Wheels when Grinding Glass

Comley¹,

Smith²,

Pearce

et al. 2004

KEM

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Diamond coated fibres have been produced by a hot filament CVD technique, where the surface of the fibres has a faceted structure making them suitable for use as an abrasive medium. Grinding trials to determine the performance of a metal bonded diamond fibre grinding wheel have been carried out using a 'state of the art' machining centre developed for the high precision ductile regime grinding of optics. Further work has been undertaken using a single fibre placed radially in a titanium disc to assess wear. Ductile ground surfaces were produced in BK7 glass with a surface roughness figure of 70nm Ra, and less than 2µm sub-surface damage. The wear behaviour of the single fibre mounted in a disc wheel was monitored. Measurements showed that the initially sharp leading edge broke down to form a chamfered wear face, the profile produced by the fibre remaining similar. Diamond fibre grinding wheels have been shown to be capable of ductile grinding. These initial trials suggest that diamond fibres have the potential for longer wheel life, when grinding in the ductile region, compared with existing resin bond wheels.

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Fabrication of diamond whiskers by powder injection molding

Luo

Deng

et al. 2018

International Journal of Refractory Metals and Hard Materials

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Diamond fibres by a hot filament CVD process

Cited by 5 publications

References 10 publications

The ductile grinding of glass using diamond fibres oriented radially in a grinding wheel

The ductile grinding of glass using diamond fibres oriented radially in a grinding wheel

Performance and Wear Behaviour of Diamond Fibre Grinding Wheels when Grinding Glass

Fabrication of diamond whiskers by powder injection molding

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