Cold Spraying of Ti 2 AlC MAX-Phase Coatings
- PDF / 795,117 Bytes
- 7 Pages / 593.972 x 792 pts Page_size
- 73 Downloads / 196 Views
JTTEE5 22:406–412 DOI: 10.1007/s11666-012-9843-1 1059-9630/$19.00 ASM International
Cold Spraying of Ti2AlC MAX-Phase Coatings H. Gutzmann, F. Ga¨rtner, D. Ho¨che, C. Blawert, and T. Klassen (Submitted June 26, 2012; in revised form October 8, 2012) Cold spraying was applied to deposit Ti2AlC on different substrate materials. The study of single impacts by scanning electron microscopy indicates that bonding of the first layer is mainly attributed to the deformation and shear instabilities occurring at substrate sites. Nevertheless, as compared to the feedstock particles, the splats appear flattened by the impact. This deformation seems to be attributed not only to local, internal shear but also to internal fracture. By applying up to five passes under optimized spray parameters, Ti2AlC-coatings with thicknesses of about 110-155 lm were achieved. XRD analysis of the coating proved that the crystallographic structure of the feedstock was retained during cold spraying. The coating microstructures show rather low porosity of about
Data Loading...
