BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//talks.cam.ac.uk//v3//EN
BEGIN:VTIMEZONE
TZID:Europe/London
BEGIN:DAYLIGHT
TZOFFSETFROM:+0000
TZOFFSETTO:+0100
TZNAME:BST
DTSTART:19700329T010000
RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0100
TZOFFSETTO:+0000
TZNAME:GMT
DTSTART:19701025T020000
RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
CATEGORIES:Institute for Energy and Environmental Flows (IEEF
 )
SUMMARY:Developing and Selecting Tribological Coatings - P
 rofessor Allan Matthews\, School of Materials\, th
 e University of Manchester\, Director BP Internati
 onal Centre for Advanced Materials
DTSTART;TZID=Europe/London:20180208T113000
DTEND;TZID=Europe/London:20180208T123000
UID:TALK97588AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/97588
DESCRIPTION:The talk begins with a brief perspective on the hi
 storical background to the subject of Tribology. I
 n regard specifically to the development of wear t
 heories\, for many years it was widely believed th
 at the best way to reduce the wear of a surface wa
 s to make it harder. This idea was implicit in one
  of the guiding ‘laws’ of wear (Archard’s Wear Law
 ) which states that wear rate is directly proporti
 onal to load and inversely proportional to hardnes
 s. In practice\, this ‘law’ doesn’t always hold tr
 ue. What we now know is that (particularly for coa
 ted surfaces) both the elastic modulus (E) and the
  hardness (H) must be considered together when see
 king to provide protection. In fact it is the rati
 o H/E which gives us the best indicator of wear re
 sistance\, especially for coatings. In this talk\,
  the reasons for this are discussed and the implic
 ations for the development of improved wear-resist
 ant surfaces are outlined\, with examples of surfa
 ces which take the optimisation of the H/E ratio a
 s the goal. Examples of coatings which achieve thi
 s are discussed\, including nanocomposite and nano
 layered coatings. Mention is also made of so-calle
 d ‘duplex’ coating systems\, which combine surface
  treatments with coatings to gain maximum tribolog
 ical benefits. 
LOCATION:Open Plan Area\, BP Institute\, Madingley Rise CB3
  0EZ
CONTACT:Catherine Pearson
END:VEVENT
END:VCALENDAR