Effect of sintering pressure and temperature on structure and properties of Ni Al metal-intermetallic composites produced by SPS Full article
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Materials Characterization
ISSN: 1044-5803 |
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| Output data | Year: 2021, Volume: 180, Pages: 111415 Pages count : 1 DOI: 10.1016/j.matchar.2021.111415 | ||||||
| Tags | Composite; Intermetallics; Microstructure; Nickel Aluminide; Spark plasma sintering; Strength | ||||||
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Abstract:
In recent decades, spark plasma sintering (SPS) has become a widespread technique in the production of high-quality intermetallic-based materials. In this study, we used SPS to fabricate multilayer metal-intermetallic (MIL) composites from pure nickel and aluminum foils. The effect of sintering temperature and pressure on the structure and properties of the fabricated MIL composites is discussed. The sintering temperature was changed from 900 to 1100 °C, the pressure varied from 10 to 40 MPa. The structure of the materials was investigated using optical microscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray energy-dispersive spectroscopy (EDX), and X-ray diffraction (XRD). Depending on the sintering regimes the intermetallic layers in the composites consisted of Ni2Al3, Ni3Al, and NiAl of cubic and tetragonal modifications. Tetragonal NiAl appeared in the form of microtwinned lamellar martensite. A change in SPS temperature from 900 to 1100 °C led to an increase in the volume fraction of nickel-enriched intermetallic compounds, which was accompanied by improving composites strength. With an increase of the SPS pressure from 10 to 30 MPa, the number of pores and cracks in composites decreased. At the same time, their bending strength increased by 2 times (from 450 to 900 MPa). Fractographic studies showed that the fracture mechanism of the intermetallic layers depends on their elemental composition and varies from brittle transcrystalline to wavy “feathery”.
Cite:
Ogneva T.S.
, Bataev I.A.
, Mali V.I.
, Anisimov A.G.
, Lazurenko D.V.
, Popelyukh A.I.
, Emurlaeva Y.Y.
, Bataev A.A.
, Tanaka S.
, Yegoshin K.D.
Effect of sintering pressure and temperature on structure and properties of Ni Al metal-intermetallic composites produced by SPS
Materials Characterization. 2021. V.180. P.111415. DOI: 10.1016/j.matchar.2021.111415 WOS Scopus РИНЦ OpenAlex
Effect of sintering pressure and temperature on structure and properties of Ni Al metal-intermetallic composites produced by SPS
Materials Characterization. 2021. V.180. P.111415. DOI: 10.1016/j.matchar.2021.111415 WOS Scopus РИНЦ OpenAlex
Identifiers:
| Web of science: | WOS:000697259700001 |
| Scopus: | 2-s2.0-85114318620 |
| Elibrary: | 47032937 |
| OpenAlex: | W3198289035 |