How to spray nano-hydroxyapatite (HAp) powder
I want to deposit nano-HAp coating for bio-implants. While spraying with plasma the phase transformation takes place at 1000 °C and complete melting occurs at 1650 °C. Also these coatings work with high porosity > 10% as porous voids allow the body tissues to penetrate and to grow.
So can anyone suggest me how to deposit this coating by other process with least transformation and high porosity. I think cold spray can overcome the problem of transformation but how will I get high porosity.
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