Structural-Phase State and Strength Properties of Pressure-Synthesized Ni₃Al Intermetallic Compound

Abstract:

The article studies dependences of grain size in Ni₃Al intermetallic compound synthesized under pressure in 3Ni+Al powder mixture in conditions of bulk exothermal reaction upon pre-pressure acting on the powder mixture and upon a delay time of applying pressure to a high-temperature synthesis product. It is proved that an increase in the pre-pressure on the parent powder mixture reduces the grain size, and an increase in the delay time increases the grain size in the synthesized intermetallic compound. Reducing the grain size from 10 to 1.75μm increases the strength of the intermetallic compound under pressure from 336 to 482 MPa (1.4 times).

• Periodical: Materials Science Forum (Volume 906)
• Pages: 95-100
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.906.95
• Online since: September 2017
• Authors: Vladimir E. Ovcharenko*, E.N. Boyangin, A.P. Pshenichnikov, T.A. Krilova
• Keywords: Grain Size, Intermetallic Compound, Self-Propagating High-Temperature Synthesis, Strength of the Intermetallic Compound, Structural Phase State

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