In-Situ Densification of Ti Coatings by the Warm Spray (Two-Stage HVOF) Process

抄録

Coating of titanium is one of the surface modification techniques attractive for corrosion protection in various industrial and medical applications. In-situ densification of titanium coatings fabricated by the Warm Spray (two-stage high velocity oxy-fuel (HVOF)) process was investigated for the purpose of obtaining impermeability together with minimum oxidation level. Ceramic beads of ZrO₂-SiO₂ were mixed with titanium feedstock powder. By the peening effect of the ceramic particles the density of the resultant titanium-matrix coatings could be improved and the minimum coating porosity obtained in this study was 0.65 vol%.