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Influence of the processing technique on the properties of NB-SI intermetallic composites for high-temperature applications processed by MIM and HIP

 
: Mulser, Marco; Hartwig, Thomas; Seemüller, Christoph; Heilmaier, Martin; Adkins, Nicholas J.E.; Wickins, M.

:
Volltext urn:nbn:de:0011-n-3279871 (1.2 MByte PDF)
MD5 Fingerprint: 829d8d03377dff1aa5eeec2b2d7a0434
Erstellt am: 21.2.2015


Chernenkoff, R.A. ; Metal Powder Industries Federation -MPIF-, Princeton/N.J.:
Advances in powder metallurgy & particulate Materials 2014 : Proceedings of the 2014 International Conference on Powder Metallurgy & Particulate Materials sponsored by the Metal Powder Industries Federation, May 18 - 22, Orlando, FL
Princeton: MPIF, 2014
ISBN: 978-0-9853397-6-0
S.8-16
International Conference on Powder Metallurgy & Particulate Materials (PowderMet) <2014, Orlando/Fla.>
Powder Metallurgy World Congress & Exhibition (PM) <2014, Orlando/Fla.>
Englisch
Konferenzbeitrag, Elektronische Publikation
Fraunhofer IFAM ()

Abstract
Nb-Si intermetallic composites feature high-temperature strength at rather low densities. This combination of properties offers a potential to replace nickel-based super alloys that are currently used for structural components of high-temperature applications, such as aircraft or land-based turbines. Previous studies revealed that Metal Injection Molding (MIM) of gas-atomized powder of the alloy composition Nb-20Si-23Ti-6Al-3Cr-4Hf (at.%) leads to a fine-grained microstructure with homogeneously distributed silicide particles. In this study, powder of the same alloy was processed by MIM as well as Hot Isostatic Pressing(HIP). Some of the sintered MIM samples were subjected to HIP for further densification. Results of all three processing techniques MIM, HIP and MIM+HIP were compared concerning residual porosity, microstructure, phase distribution and mechanical properties at ambient and elevated temperatures.

: http://publica.fraunhofer.de/dokumente/N-327987.html