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SUMMARY:Review of the mechanical properties of diamond - John Field\, Cave
 ndish Laboratory\, University of Cambridge
DTSTART:20110505T150000Z
DTEND:20110505T160000Z
UID:TALK29857@talks.cam.ac.uk
CONTACT:Stephen Walley
DESCRIPTION:Up to 1955\, the only form of diamond was natural diamond. How
 ever\, since then it has been possible to grow diamond using High Pressure
  and High Temperature (HPHT techniques) as well as low pressure Chemical V
 apour Deposition (CVD) methods. It is also possible to produce Polycrystal
 line Diamond composites (PCDs). All of these products have exceptional pro
 perties and there are a large number of potential applications. It is impo
 rtant to know the fracture\, cleavage\, strength\, erosion\, friction and 
 polishing properties of all these various materials. Basic strength proper
 ties are often difficult to obtain. For example\, natural diamonds are inv
 ariably small\, irregular\, may have internal strains and information on t
 he impurities they contain usually requires separate investigation. To the
 se disadvantages\, can be added the one of cost\; strength testing invaria
 bly involves breaking the sample! This talk reviews the current state of k
 nowledge of the mechanical properties of all the various types of diamond 
 and the techniques to measure them.
LOCATION:Mott Seminar Room\, Cavendish Laboratory\, Department of Physics
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