The exceptional combination of mechanical, thermal, chemical and optical pr
operties of diamond make this material an ideal choice for numerous applica
tions in which materials are required to operate in adverse environments ex
posed to abrasion or chemical attack, or in situations requiring the dissip
ation of extreme levels of power, such as windows for high power lasers. Pr
ogress in the synthesis and processing of chemical vapour deposition (CVD)
diamond achieved at De Beer(1) Industrial Diamond Division (Debid) has open
ed many of these applications by bringing to the market a diamond material
that is available in large areas, in industrial quantities and with the hig
h quality and reproducible properties needed to meet the demanding requirem
ents of the industry. This paper will review the properties of the differen
t CVD diamond material grades used in optical, thermal and mechanical appli
cations. (C) 2000 Published by Elsevier Science S.A. All rights reserved.