Abstract
The present study uses plasma spray technology as a production process for the fabrication of free- stand-ing, near- net- shaped NiAl components. Attention is especially focused on the in situ synthesis of NiAl. A new internal, dual powder injector blade has been designed to improve the gun performance as well as the spray efficiency of the feedstock powder. The specific role of the substrate (i.e., its shape and material) for the successful spray forming of free- standing parts is studied. The as- sprayed parts were subjected to a post- heat- treatment and hot isostatic pressing. Subsequently, they were metallographically inspected. The mechanical properties, such as hardness, Young’s moduli, and the fracture behavior during four-point bending, are also examined.
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