Properties and Microstructure Evaluation in NiAl-xWC (x = 0 − 90 wt.%) Intermetallic-Based Composites Prepared by Mechanical Alloying

Daria Piechowiak; Albert Kania; Natalia Łukaszkiewicz; Andrzej Miklaszewski

doi:10.3390/ma16052048

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Title

Properties and Microstructure Evaluation in NiAl-xWC (x = 0 − 90 wt.%) Intermetallic-Based Composites Prepared by Mechanical Alloying

Authors

Daria Piechowiak (PP) ^{[ 1 ][ SzD ]}
Albert Kania ^{[ S ]}
Natalia Łukaszkiewicz ^{[ S ]}
Andrzej Miklaszewski (WIMiFT) ^{[ 2 ][ 2.8 ][ P ]}

^{[ 1 ]} Politechnika Poznańska | ^{[ 2 ]} Instytut Inżynierii Materiałowej, Wydział Inżynierii Materiałowej i Fizyki Technicznej, Politechnika Poznańska | ^{[ SzD ]} doctoral school student | ^{[ S ]} student | ^{[ P ]} employee

Scientific discipline (Law 2.0)

[2.8] Materials engineering

Year of publication

2023

Published in

Materials

Journal year: 2023 | Journal volume: vol. 16 | Journal number: iss. 5

Article type

scientific article

Publication language

english

Keywords

EN

intermetallic-based composites
mechanical alloying
structural analysis
microstructure evaluation

Abstract

EN In this work, NiAl-xWC (x = 0 − 90 wt.% WC) intermetallic-based composites were successfully synthesized by mechanical alloying (MA) and a hot-pressing approach. As initial powders, a mixture of nickel, aluminum and tungsten carbide was used. The phase changes in analyzed systems after mechanical alloying and hot pressing were evaluated by an X-ray diffraction method. Scanning electron microscopy and hardness test examination were used for evaluating microstructure and properties for all fabricated systems from the initial powder to the final sinter stage. The basic sinter properties were evaluated to estimate their relative densities. Synthesized and fabricated NiAl-xWC composites showed an interesting relationship between the structure of the constituting phases, analyzed by planimetric and structural methods and sintering temperature. The analyzed relationship proves that the structural order reconstructed by sintering strongly depends on the initial formulation and its decomposition after MA processing. The results confirm that it is possible to obtain an intermetallic NiAl phase after 10 h of MA. For processed powder mixtures, the results showed that increased WC content intensifies fragmentation and structural disintegration. The final structure of the sinters fabricated in lower (800 °C) and higher temperature regimes (1100 °C), consisted of recrystallized NiAl and WC phases. The macro hardness of sinters obtained at 1100 °C increased from 409 HV (NiAl) to 1800 HV (NiAl + 90% WC). Obtained results reveal a new applicable perspective in the field of intermetallic-based composites and remain highly anticipated for possible application in severe-wear or high-temperature conditions.

Date of online publication

01.03.2023

Pages (from - to)

2048-1 - 2048-15

DOI

10.3390/ma16052048

URL

https://www.mdpi.com/1996-1944/16/5/2048

Comments

Article number: 2048

License type

CC BY (attribution alone)