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Preparation of TiN-Ti5Si3 in-situ composites by Selective Laser Melting

 
: Gu, D.; Shen, Y.; Lu, Z.

:

Materials letters 63 (2009), No.18-19, pp.1577-1579
ISSN: 0167-577X
English
Journal Article
Fraunhofer ILT ()

Abstract
The Selective Laser Melting (SLM) Rapid Manufacturing (RM) of the high-energy ball milled Ti-Si3N4 composite powder with the mol ratio of 9:1 was performed in the present work. The microstructural characterizations revealed the formation of TiN reinforced Ti5Si3 matrix composites after laser processing via the in-situ synthesis reaction 9Ti+Si3N4=4TiN+Ti5Si3. The in-situ presented TiN reinforcing phase possessed a refined granular morphology and a uniform distribution throughout the Ti5Si3 matrix, showing a clear and compatible interfacial structure with the matrix. The metallurgical mechanisms for the in-situ synthesis of TiN reinforced Ti5Si3 matrix composites by SLM were also proposed.

: http://publica.fraunhofer.de/documents/N-101738.html