49 / 66
4 9
iTSSe
TSS
A D V A N C E D
M A T E R I A L S
&
P R O C E S S E S |
M A Y
2 0 1 5
production of a supersaturated Ni-Cr-C solid solution from
which the carbide phase can be precipitated. In previous
work, a broad range of plasma parameters were trialed to as-
sess their effect on the degree of carbide dissolution at a fixed
spray distance of 100 mm. The current work builds on the
most promising plasma parameters from those trials. Part 2 of
this article series investigates the effect of spray distance on
the compositional development in Cr
3
C
2
-NiCr coatings during
high-energy plasma spray. Coating compositions were ana-
lyzed in detail and quantified through Rietveld fitting of the
coating XRD patterns. Coating microstructural features were
correlated with the observed variations in composition. The
effect of the spray parameters and spray distance on the equi-
librium coating compositions is discussed.
Cross-sectional BSE image illustrating the dark contrast “swirl”
features in splats in which high degrees of carbide dissolution
occurred.
iTSSe
TSS
JTST
HIGHLIGHTS
STICKWITH THE BEST DeWAL Thermal Spray Tapes DeWAL Industries offers the highest quality, most complete line of thermal spray tapes — aluminum foil, fiberglass fabric, silicone-impregnated fiberglass, and combinations of these materials. For wire arc and HVOF, DeWAL double-ply tapes reduce set-up time and withstand the harshest environments. DeWAL tapes can be single-ply or multi-layer. DeWAL tapes adhere aggressively, ensuring sharp edges, resisting high temperatures, and removing cleanly after spraying. Call DeWAL today, then thermal spray away. 15 Ray Trainor Drive Narragansett, RI 02882 www.dewal.com usa1@dewal.com 800-366-8356 (International: 001-401-789-9736) Quality of Product...First Quality Approvals: GE, Pratt & Whitney, Rolls Royce17