Intermetallic particle

particles form during solidification of metallic alloys.

Aluminium alloys

Al-Si-Cu-Mg alloys

Al-Si-Cu-Mg alloys form Al5FeSi- plate like intermetallic phases like -Al₈Fe₂Si, Al₂Cu, etc. The size and morphology of these intermetallic phases in these alloys control the mechanical properties of these alloys, especially strength and ductility. The size of these phases depends on the secondary dendrite arm spacing, as well as the Si content of the alloy, of the primary phase in the micro structure.

Phases and crystal structures

Phase	Structure	Space Group	a	b	c	α	β	γ	..
α-Al₈Fe₂Si	hexagonal	p63/mmc	12.404	12.404	26.234	90	90	120	..
β-Al₅FeSi	monoclinic	2/m	6.16760	6.1661	20.8093	..	..	91	..
Al₂Cu	..	..	..	..	..	..	..	..	..

Magnesium alloys

WE 43

In-situ synchrotron diffraction experiment on Electron alloy-WE 43 shows that this alloy form the following intermetallic phases ;Mg12Nd, Mg14Y4Nd, and Mg24Y5.

Phases and crystal structures

Phase	Structure	Space Group	a	b	c	α	β	γ	..
Mg₄₁Nd₅	..	..	..	..	..	..	..	..	..
β-Mg₁₄Nd₂Y	face centered cubic		2.2 nm			..	..		..
Mg₂₄Y₅	body centered cubic	..	1.12 nm	..	..	..	..	..	..

Intermetallic particle

Aluminium alloys

Al-Si-Cu-Mg alloys

Phases and crystal structures

Magnesium alloys

WE 43

Phases and crystal structures

AZ 91