Ti2AlC coatings deposited by High Velocity Oxy-Fuel spraying
2008 (English)In: Surface and Coatings Technology, ISSN 0257-8972, Vol. 202, no 24, 5976-5981 p.Article in journal (Refereed) Published
High Velocity Oxy-Fuel has been utilized to spray coatings from Ti2AlC (MAXTHAL 211®) powders. X-ray diffraction showed that the coatings consist predominantly of Ti2AlC with inclusions of the phases Ti3AlC2, TiC, and Al–Ti alloys. The fraction of Ti2AlC in coatings sprayed with a powder size of 38 μm was found to increase with decreasing power of the spraying flame as controlled by the total gas flow of H2 and O2. A more coarse powder (56 μm) is less sensitive to the total gas flow and retains higher volume fraction of MAX-phase in the coatings, however, at the expense of increasing porosity. X-ray pole figure measurements showed a preferred crystal orientation in the coatings with the Ti2AlC (000l) planes aligned to the substrate surface. Bending tests show a good adhesion to stainless steel substrates and indentation yields a hardness of 3–5 GPa for the coatings sprayed with a powder size of 38 μm.
Place, publisher, year, edition, pages
Elsevier , 2008. Vol. 202, no 24, 5976-5981 p.
MAX-phase, High Velocity Oxy-Fuel (HVOF), Phase transitions, X-ray diffraction, Scanning electron microscopy (SEM)
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-13102DOI: 10.1016/j.surfcoat.2008.06.184OAI: oai:DiVA.org:liu-13102DiVA: diva2:17836