Formation of fine Mg2Si phase in Mg–Si alloy via solid-state sintering using high energy ball milling

Structure and mechanical behavior ofin situdeveloped Mg2Si phase in magnesium and aluminum alloys – a review

“…reported that the average grain sizes of Mg 2 Si particles in Mg-1Si, Mg-4Si and Mg-6Si alloys synthesized via solid-state sintering using high-energy ball milling are 10 mm, 8 mm and 6 mm, respectively. 17 On increasing the amount of silicon, the average grain size of the Mg 2 Si phase decreases. Fig.…”

“…10(a-d) show the SEM and EDS spectra at different regions present in the SEM micrographs of pure Mg, Mg-1Si, Mg-4Si, and Mg-6Si alloys synthesized via the powder metallurgy route. 17 Each micrograph consists of three different regions: (1) matrix regions, (2) gray particles, (3) dark regions. These regions are indicated by points 1, 2 and 3, respectively.…”

“…The maximum solid solubility of silicon in magnesium is only 0.003 at%. 17 Therefore, Si atoms react with Mg atoms, leading to the formation of the intermetallic compound Mg 2 Si. Silicon improves uidity, which allows the strengthening of Mg by precipitation hardening.…”

“…These particles are highly plastically deformed and easily interlocked. Seth et al 17 reported the SEM micrographs of pure magnesium, silicon (as received) and magnesium-silicon alloy powder aer three hours of ball milling and reported the effect of compaction pressure on the green density of magnesium powder with and without ball milling at different compaction pressures. Fig.…”

“…Superheating, directional solidication, carbon inoculation and the addition of modiers are popular methods. [14][15][16] Recently Seth et al 17 reported the formation of a ne Mg 2 Si phase in Mg-1Si, Mg-4Si and Mg-6Si alloys via solid-state sintering using high-energy ball milling. Each specimen of alloy was sintered at 500 C for 30 minutes.…”