Diamond has been deposited on to a 150 μm dia. Pt/Pt–13 wt-%Rh thermocouple wire by hotfilament chemical vapour deposition to form a diamond fibre thermal sensor. The diamond fibres were used to measure temperatures up to ∼ 270°C in air and up to ∼ 1000°C infiowing Ar. The diamond fibres with a Pt core were much less brittle than the corresponding W cored diamond fibres. This is attributed to a thin graphite layer between the core and the diamond which allowed interface decohesion, plastic deformation of the ductile Pt core, and relaxation of extrinsic residual stresses.
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References
1.
CHIAQ. S., YOUNISC. M., PARTRIDGEP. G., ALLENG. C., MAYP. W., and REGOc. A.: J. Mater. Sc., 1994, 29, 6397.
2.
MAYP. W., REGOC. A., ASHFOLDM. N. R., ROSSERK. N., LUG., WALSHP., HOLTI., EVERITTN. M., and PARTRIDGEP. G.: Diam. Relat. Mater., 1995, 4, 794.
3.
PARTRIDGEP. G., MAYP. W., REGOC. A., and ASHFOLDM. N. R.: Mater. Sci. Technol., 1994, 10, 505.
