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Polycrystalline diamond films for acoustic wave devices

Whitfield, MD; Audic, B; Flannery, CM; Kehoe, LP; Cream, GM; Johnston, C; Chalker, PR; (1998) Polycrystalline diamond films for acoustic wave devices. DIAMOND AND RELATED MATERIALS , 7 (2-5) 533 - 539.

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Abstract

A laser ultrasonics technique has been used to measure acoustic wave velocities in polycrystalline CVD diamond for the first time. Lamb (plate) waves propagate with very high velocities in the range 8700-12 200 m s(-1); the lowest values are recorded for films with the lowest crystal quality and highest non-diamond content. High-quality films with differing crystal textures [(100), (110)] or thickness (250-535 mu m) show little variation. The results are discussed in terms of the fabrication of a high-sensitivity flexural plate wave (FPW) device for sensing applications in hostile environments. (C) 1998 Elsevier Science S.A.

Type: Article
Title: Polycrystalline diamond films for acoustic wave devices
Location: EDINBURGH, SCOTLAND
Keywords: polycrystalline, diamond films, acoustic wave devices, laser ultrasonics, SURFACE, MORPHOLOGY
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: http://discovery.ucl.ac.uk/id/eprint/139015
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