Understanding cold spray technology for hydroxyapatite deposition

The standard method for applying hydroxyapatite (HAp) coatings to biomedical implants is plasma spraying. However, due the high temperature of plasma, these frequently experience negative effects like evaporation, phase change, de-bonding, gas release, and residual stresses. This paper summarizes a revolutionary technique known as cold spray (CS), which allows HAp be applied at temperatures well below their melting point. CS has several advantages over conventional high-temperature technologies, it seems approaching parity with other older methods. When using approach, enhance bioactivity, increase corrosion resistance, main­tain characteristics calcium phosphate ceramics. study aims give concise comprehensive overview HAp-based materials, including substituted-HAp HAp/poly­mer composites, applications in bone tissue engineering. To better understand technology, comparison CS, high-velocity oxy-fuel (HVOF), given end. perspective difficulties were also highlighted.