Physics – Condensed Matter – Materials Science
Scientific paper
2009-11-06
Physics
Condensed Matter
Materials Science
Total 28 pages, 10 figures, and 1 table
Scientific paper
Cobalt carbide nanoparticles were processed using polyol reduction chemistry that offers high product yields in a cost effective single-step process. Particles are shown to be acicular in morphology and typically assembled as clusters with room temperature coercivities greater than 4 kOe and maximum energy products greater than 20 KJ/m3. Consisting of Co3C and Co2C phases, the ratio of phase volume, particle size, and particle morphology all play important roles in determining permanent magnet properties. Further, the acicular particle shape provides an enhancement to the coercivity via dipolar anisotropy energy as well as offering potential for particle alignment in nanocomposite cores. While Curie temperatures are near 510K at temperatures approaching 700 K the carbide powders experience an irreversible dissociation to metallic cobalt and carbon thus limiting operational temperatures to near room temperature.
Carpenter Elisabeth
Carroll K. J.
Chen Yafeng
Chen Zai-Zhang
Chinnasamy C. N.
No associations
LandOfFree
High coercivity cobalt carbide nanoparticles processed via polyol reaction: A new permanent magnet material does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with High coercivity cobalt carbide nanoparticles processed via polyol reaction: A new permanent magnet material, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High coercivity cobalt carbide nanoparticles processed via polyol reaction: A new permanent magnet material will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-391384