Vacuum plasma spray forming of refractory metals and ceramics for space furnace containment cartridges—an extended abstract

Molybdenum and tungsten coatings for x- ray targets obtained through the low-pressure plasma spraying process

“…Molybdenum coatings were studied in view of their possible application as an under-layer. The results are summarized as follows: 9 Molybdenum coatings exhibited a fine homogeneous lamellar structure with almost 17% open porosity. The splats forming the coating were small (-5 lam) compared to the powder particle size (10 to 45 ~m).…”

Optimisation and characterisation of tungsten thick coatings on copper based alloy substrates

“…The W coating mean density, measured by a water picnometer, was 17.8 g cm À3 corresponding to about 92% of the theoretical bulk density: this value is slightly lower with respect that of W-PS deposited on refractory materials [6,7] but still of interest for fusion reactors. The mean surface roughness was R a = 7.3 lm (min 6.4 lm, max 9.1 lm).…”

“…W-PS coatings for fusion application have been successfully manufactured on refractory substrates (molybdenum or graphite) [6,7] by high temperature spraying obtaining coatings with sufficient cohesion and low residual stress.…”