D. J. Branagan, M. Breitsameter, B. E. Meacham, The NanoSteel Company, Idaho Falls, ID; S. A. Hackney, Michigan Technological University, Hougton, MI; R. Thorpe, A. Yanski, E. Motyka, Praxair TAFA, Concord, NH
This paper will explore recent enhancements in arc spray coating technology enabled via a combined approach using an advanced spray system, the TAFA Model 9935 CoArcTM System coupled with the development of unique glass forming wires including 140MXC and 110MXC-V2. The wires studied are novel glass forming steels which readily form amorphous (i.e. angstrom scale) microstructures at reduced cooling rates and which can be devitrified through subsequent heat treatment to yield nano-scale composite microstructures. The physical metallurgy of the as-sprayed and devitrified coatings will be explored in detail using X-ray diffraction, optical, SEM, and TEM studies. The resulting performance will be characterized using a variety of drop impact, corrosion, and wear tests. The results will show how these newly developed nano-composite steel coatings can bridge the gap between existing HVOF coatings and conventional wire arc coatings with excellent combinations of properties and performance.
Summary: This paper will explore recent enhancements in arc spray coating technology enabled via a combined approach using an advanced spray system, the TAFA Model 9935 CoArcTM System coupled with the development of unique glass forming wires including 140MXC and 110MXC-V2. The wires studied are novel glass forming steels which readily form amorphous (i.e. angstrom scale) microstructures at reduced cooling rates and which can be devitrified through subsequent heat treatment to yield nano-scale composite microstructures. The physical metallurgy of the as-sprayed and devitrified coatings will be explored in detail using X-ray diffraction, optical, SEM, and TEM studies. The resulting performance will be characterized using a variety of drop impact, corrosion, and wear tests. The results will show how these newly developed nano-composite steel coatings can bridge the gap between existing HVOF coatings and conventional wire arc coatings with excellent combinations of properties and performance.
