High-speed Deposition of CaO-Rich Calcium Titanate Film by Laser CVD and its Change in MICROSTRUCTURE by Immersion in Simulated Body Fluid

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  • レーザーCVDによるCaOリッチ組成のチタン酸カルシウム膜の高速合成と擬似体液浸漬による微細組織変化
  • レーザー CVD ニ ヨル CaO リッチ ソセイ ノ チタンサン カルシウムマク ノ コウソク ゴウセイ ト ギジ タイエキ シンシ ニ ヨル ビサイ ソシキ ヘンカ

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Abstract

<p>Calcium titanate (CaTiO3) and CaO-rich calcium titanate compound films were prepared by laser chemical vapor deposition (CVD), and the change in morphology by immersion in simulated body fluid was investigated. At the Ca/Ti supplying ratio (RCa/Ti) of 0.9 and the laser powder (PL) of 60 W, CaTiO3 film having pyramidal facets in a cone-like morphology was deposited, whereas at RCa/Ti = 1.6 and PL = 60 W, Ca-rich calcium titanate compound film with a cauliflower-like morphology was formed at the deposition rate of 225 μm h−1. By immersion in Hanks’ solution for 259.2 ks, the Ca-rich calcium titanate compound film exhibited the significant formation of calcium phosphate granules covering the film surface, while a small amount of calcium phosphate precipitates was partially formed on the CaTiO3 film surface.</p>

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