open access

https://hdl.handle.net/2115/75323

TiC coating on titanium by carbonization reaction using spark plasma sintering

日本語

SPS

2012-06-30

軽金属学会

Journal of Japan Institute of Light Metals

62(6)

233-236

Hard TiC coating layer is formed on commercially pure titanium by heat treatment in a Spark Plasma Sintering (SPS) mold filled with graphite powder. The thickness of the TiC coating layer is about 10 μm in case of heat treatment for 3600 s at 1243 K and the thickness of this layer is almost uniform. This coating consists of TiC and graphite, and titanium oxide is not detected by X-ray diffractometer (XRD). Vickers hardness test revealed that the hardness of TiC coating was 1600 HV, which was much higher than that of titanium substrate (130 HV). The hard TiC coating on titanium is considered to have advantage in the applications to load-bearing parts of hard tissue replacements. The growth behavior of TiC is conformed to be parabolic, and the activation energy of growth of TiC is 218.6 kJ/mol. This value is close to the activation energy of carbon diffusion in TiC. Therefore, the rate of growth of TiC is controlled by carbon diffusion in TiC phase.

学術雑誌論文

Version of Record

0451-5994

1880-8018

AN00669773