<div class="page" title="Page 1"><div class="layoutArea"><div class="column"><p><span>Quaternary chalcogenide Cu</span><span>2</span><span>ZnSnS</span><span>4 </span><span>is a potential candidate for thermoelectric (TE) application due to a number of advantages including containing only non-toxic and abundant elements, high Seebeck coefficient and low thermal conductivity. In this study, Cu</span><span>2</span><span>ZnSnS</span><span>4 </span><span>was synthesized using mechanical alloying method from Cu, Zn, Sn and S powders. In order to study the effect of milling duration on the formation of Cu</span><span>2</span><span>ZnSnS</span><span>4</span><span>, different milling duration of 2, 4, 12 and 16 h were carried out. As the results, Cu</span><span>2</span><span>ZnSnS</span><span>4 </span><span>wasstarted to form after milling for 12 h. The formation of Cu</span><span>2</span><span>ZnSnS</span><span>4 </span><span>was completed after 16 h of milling. In addition, Cu</span><span>2</span><span>ZnSnS</span><span>4 </span><span>nanoparticles were obtained after 16 h of milling with the particle distribution mostly in the range of 50 - 60 nm. </span></p></div></div></div>
Titanium was the most commonly used metal in orthopedic implant. However, no direct chemical bond would be possible between the implant and surrounding bone tissue, and so the titanium implants lack the potential to induce rapid bone formation. Coating the titanium with a bioresorbable and osteoconductive layer would have a significant osseointegration. The purpose of this study was to fabricate and characterize calcium carbonate coating. The coating was fabricated on Ti substrate by converting of CaO coating in humidity environment under CO2 flow. The CaO coating was deposited by sandblasting process. The CaCO3 coating was approx. 1.85 µm thick and covered the surface’s surface uniformly. The coating strength was approx. 16.1 MPa and the Ca content in the coating was 2.02 mg/mm2.
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