Crystal structure of Al_8.77Fe_0.80Ni_1.20Si_0.23

Area of Science:

• Materials Science
• Crystallography
• Solid State Chemistry

Background:

• The Al-Si-Ni-Fe quaternary system is complex, with potential for novel intermetallic phases.
• Understanding phase formation in such systems is crucial for developing advanced materials.

Purpose of the Study:

• To synthesize and characterize a new phase in the Al-Si-Ni-Fe quaternary system.
• To determine the crystallographic structure and properties of the novel phase.

Main Methods:

• High-pressure sintering of an Al-rich prealloy.
• X-ray diffraction for crystallographic analysis.
• Lattice parameter determination and space group identification.

Main Results:

• A novel phase, Al_8.77Fe_0.80Ni_1.20Si_0.23, was successfully synthesized.
• The phase crystallizes in the space group P2₁/c with specific lattice parameters.
• Co-occupancy of Al/Si and Ni/Fe sites was observed and quantified.

Conclusions:

• The discovery of this novel phase expands the known phase diagram of the Al-Si-Ni-Fe system.
• The crystallographic data provides a foundation for further research into the properties and applications of this intermetallic compound.