M. Fukumoto, H. Wada, K. Tanabae, M. Yamada, Toyohashi University of Technology, Toyohashi, Japan
Self designed high pressure and high temperature cold spray equipment was installed in the laboratory and a particle deposition mechanism was fundamentally observed by investigating the deposition behavior of an individual particle onto the substrate surface. Macroscopic depressions were observed on the substrate surface by colliding the particles spayed onto it, even in the case of the hardness of the materials sprayed is softer than that of the substrate materials. Interface microstructure change with increase of particle velocity sprayed was preferentially observed. The shear localization corresponded well to the improvement of deposition efficiency of the particle to substrate in the velocity region beyond the so-called critical velocity.
Summary: Self designed high pressure and high temperature cold spray equipment was installed in the laboratory and a particle deposition mechanism was fundamentally observed by investigating the deposition behavior of an individual particle onto the substrate surface. Macroscopic depressions were observed on the substrate surface by colliding the particles spayed onto it, even in the case of the hardness of the materials sprayed is softer than that of the substrate materials. Interface microstructure change with increase of particle velocity sprayed was preferentially observed. The shear localization corresponded well to the improvement of deposition efficiency of the particle to substrate in the velocity region beyond the so-called critical velocity.
