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Crack-free functionally graded TiC/Ti composite materials were fabricated by laser engineered net shaping (LENS), with compositions changing from pure Ti to approximately 95 vol% TiC. By delivering the constituent materials from different powder feeders and through process control, the LENS process can be used for the fabrication of functionally graded materials.
Joining of nanocrystalline materials will be a great challenge. In this paper, a reaction synthesis-based in situ joining technique was developed for joining dissimilar nanocrystalline materials by use of the spark plasma sintering (SPS) process. The joining technique combines the nanocrystalline material processing and joining operations into a single process.
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