Effect of nickel content and milling parameters on martensitic transformation of Fe–Ni during mechanical alloying

One-pot synthesis of highly active Ni/Fe nano-bimetal by simultaneous ball milling and in situ chemical deposition

“…It indicates that the rate of dechlorination activity actually decreased per unit of Ni–Fe dosage. The similar results were also reported by Zhu et al 21 for degradation of 4-CP on Ni/Fe bimetal prepared by BM. The influence of the initial concentration of 4-CP on dechlorination activity was shown in Fig.…”

“…In a bimetallic system, primary metal (Fe, Zn, Sn, Mg or Al) serves as an electron donor to detoxify the contaminants, whereas the secondary metal (Cu, Ni, Pd, Pt or Ag) accelerates the dechlorination rate and prevents the deposition of by-products on the surface. 21–23 Although, Pd, Pt, and Ag showed an excellent enhancement towards the dechlorination activity of COCs, but its high cost limits its wide application. Recently, nickel ions incorporated on ZVI exhibited a higher efficiency compared with iron alone in the detoxification of chlorinated aromatic compounds.…”

“…Recent studies suggested that Ni–Fe bimetals showed superior degradation activity prepared by ball milling (BM). 21,29–32 Whereas, in BM process Ni can be homogeneously distributed over the Fe surface instead of the surface coverage of metals occurred in the CSD process. 33 But bimetals prepared by BM usually have larger grain size and low compactness of two metals, which is unfavorable for dechlorination reaction.…”

Enhanced hydrodechlorination of 4-chlorophenol by Cu/Fe bimetallic system via ball-milling

“…BM involves heavy deformation of the powders. The formation of internal strain and dislocations in ball-milled powders can substantially increase the adsorption of hydrogen in the materials [26,27], which is beneficial for the dechlorination efficiency improvement. However, once the metal was milled for too long time, the bimetallic systems easily tended to become more intact alloy crystals with less internal strain and dislocations, which inversely decrease the dechlorination ability.…”

An investigation on the variations occurring during Ni3Al powder formation by mechanical alloying technique

“…Although some alloys and intermetallics synthesized by MA such as: Al-Cu [4], Al-Ni [5], Mn-Ni [6], Mg-Ni [7], Al-Ti [8], Fe-Al, Co-Al and Mn-Al [9] and Fe-Ni [10] have been studied earlier, there is less experimental results on mechanical alloying of Ni 3 Al. The present work attempts to reveal the phase and microstructural changes occurring during milling of Ni and Al powders mixed in a nominal composition appropriate for Ni 3 Al intermetallic.…”