Supersonic Laser Deposition of Self-Lubricating Coatings

CrN–Ag self-lubricating hard coatings

CrN–Ag composite films, 2.5–4 Am thick, were deposited by reactive magnetron sputtering on Si and stainless steel substrates in a 0.4 Pa pure nitrogen atmosphere at 500 -C. The layer composition was controlled by the relative power to 7.5-cm-diameter Ag and Cr targets to be 0, 3, 12, and 22 at.% Ag. The layers exhibit a dense columnar microstructure where the Ag is homogeneously distributed in ...

Self-lubricating, low-friction, wear-resistant Al-based quasicrystalline coatings

After gas atomization, a quasicrystalline powder based on aluminium was used to prepare a thick coating by high-velocity oxygen-fuel flame torch spraying. This layer was deposited on top of a bond-coat layer on a steel plate. A post-spraying annealing treatment turned the two layers to their stable state, a γ-brass crystal and an icosahedral quasicrystal, respectively. The projection parameters...

Combinatorial Pulsed Laser Deposition of Ag-containing Calcium Phosphate Coatings

G. SOCOL, M. SOCOL, L. SIMA, S. PETRESCU, M. ENCULESCU, F. SIMA, M. MIROIU, G. POPESCU-PELIN, N. STEFAN, R. CRISTESCU, C.N. MIHAILESCU, A. STANCULESCU, C. SUTAN, I.N. MIHAILESCU National Institute for Lasers, Plasma and Radiation Physics, Magurele, Ilfov, Romania National Institute of Materials Physics, Magurele, Ilfov, Romania Institute of Biochemistry, Splaiul Independentei 296, Bucharest, Ro...

High Temperature Self-Lubricating Materials

Solid-State Manufacturing of Tungsten Deposits onto Molybdenum Substrates with Supersonic Laser Deposition

Near fully dense tungsten coatings onto molybdenum substrates have been demonstrated using the Supersonic Laser Deposition (SLD) process. This is a characteristic that is not readily achievable with refractory materials. The tensile strength of the tungsten deposited coatings, 724MPa, is comparable to that of wrought tungsten with no evidence of melting or substrate grain growth. The results ha...