ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The open photoacoustic cell technique (OPC) was carried out in order to measurethe thermal diffusivity of hardmetal. Hardmetal is usually processed by the conventionalpowder technology techniques: mix of WC + Co powders, compacting, and liquid phasesintering A new method to process hardmetal parts is hereby described. Parts of WC-15%wtCo were processed by using high pressure – high temperature sintering. It was used thepressure of 5GPa, temperature of 1350 oC, and time of 2 minutes of sintering. In addition tothe thermal diffusivity, heat capacity was considered and the thermal conductivity achieved.Results matched with the values of the literatures where others photoacoustic techniques havebeen employed. It was achieved a thermal capacity of 3.34J/cm3K, thermal diffusivity of0.35cm2/s, and thermal conductivity of 116.9W/mK. It reveals that the HPHT processed WC-15%wtCo hardmetal is able to work as a cutting tool, in the thermal point of view
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.530-531.41.pdf
