Mechanism of combustion synthesis of Mg2Ni

Development of magnesium/(yttria+nickel) hybrid nanocomposites using hybrid microwave sintering: Microstructure and tensile properties

“…It indicates that reaction product between Mg and Ni can readily form through solid phase processing and the product formed is confirmed to be Mg 2 Ni intermetallic at low temperatures up to 750 • C. Studies [5,6] on solidification processed Mg/Ni composites using micron size nickel particles also reported the formation of Mg 2 Ni phase. The formation of Mg 2 Ni in Mg/(Y 2 O 3 + Ni) system in the present study is thus consistent with the observation of other research groups [23][24][25]. The formation of Mg 2 Ni intermetallic in hybrid nanocomposites further assisted in grain boundary pinning in addition to yttria and nickel reinforcements in magnesium matrix.…”

“…3). In related studies targeted to synthesize Mg 2 Ni using solid state process, presence of unreacted nickel and magnesium were similarly observed [24,25]. Among hybrid nanocomposites, an increase in size and amount of intermetallic clusters with increasing presence of nickel particulates in the samples was observed.…”

“…Based on the previous study [23] solid state reaction between Mg and Ni took place at the low temperature which is even lower than Mg-Ni eutectic temperature (506 • C). In another related studies, only Mg 2 Ni phase was formed when the constituent Mg and Ni powders were synthesized at 670 • C [24] and 750 • C (1023 K) [25]. It indicates that reaction product between Mg and Ni can readily form through solid phase processing and the product formed is confirmed to be Mg 2 Ni intermetallic at low temperatures up to 750 • C. Studies [5,6] on solidification processed Mg/Ni composites using micron size nickel particles also reported the formation of Mg 2 Ni phase.…”

Properties of Mg2NiH4 prepared by microwave-assisted activation synthesis from micro-particles

“…The temperature of the hydriding/dehydriding reaction can be reduced [14] in a certain extent attributed to the effect of the microwave field. The experimental temperature is 779 K, which is lower than the synthesis temperatures of the IM (823 K) [12] and the HCS (943 K) [13]. However, it is well known that without any treatment on the raw magnesium and nickel powder, a hydriding/dehydriding reaction would never be successful [14].…”

Magnesium-based materials for hydrogen storage: Recent advances and future perspectives

“…The most famous compound in this category is Mg 2 Ni, which is actually the first magnesium-based alloy for hydrogen storage that was developed at Bruce-Haven National Laboratory in 1968 [89] . Since then, Mg 2 Ni has gained numerous research efforts as hydrogen storage materials [37,[90][91][92][93] . For example, Zaluski et al [37] fabricated Mg 2 Ni-Pd nanocomposites by ball-milling to study their hydrogenation behavior.…”