Synthesis and Characterization of Zn-Ni_x Advanced Alloys Prepared by Mechanical Milling and Sintering at Solid-State Process

Abstract

Mechanical ball milling assisted by sintering in the solid state was used in this research to produce the Zn-Ni x system alloy. e derivative powder compositions of Zn-Ni x (x 0, 5, 10, 15, and 20 wt.%) were obtained to study the Ni e ects on the microstructural and mechanical properties. It is worth remarking that conventional methods are not appropriate for the manufacture of the Zn-Ni x system alloy. e morphological structure and phases were examined by optical microscopy, X-ray di raction, and SEM/EDS elemental mapping, whereas the mechanical behavior was accomplished by means of a diamond indentation print (Hardness Vickers). e results showed that the intermetallic γ-ZnNi phase did not form during milling time (<4 h); it appears after the sintering process, which is associated with atomic di usion mechanism through grain boundary at the minimum interfacial energy (ΔG256°C −13.83 kJ·mol −1).e powder Zn-Ni 10 was found to have better properties. Semispherical coarser particles were seen into the metal matrix (Zn δ-hcp structure) as segregates; however, each particle contains an intermetallic compound Zn-Ni that encloses the Ni (α-fcc structure) pure phase.e Ni-α phase was then transformed into a γ-ZnNi intermetallic compound which shifts to higher values of mechanical hardness from about 60 HV to 400 HV units.

Recent research and progress of biodegradable zinc alloys and composites for biomedical applications: Biomechanical and biocorrosion perspectives

“…Sintering is performed under a controlled environment at a temperature 0.6–0.8 times the melting point of the metal powders. This process can also be used for the fabrication of biodegradable Zn-based alloys [ 114 , 115 ]. The maximum density of ~95% was achieved via hot pressing (HP), a process that simultaneously applies compression and sintering of the part [ 116 , 117 ].…”

In Vitro Degradability, Microstructural Evaluation, and Biocompatibility of Zn-Ti-Cu-Ca-P Alloy

“…Here, the analyzed and fixed temperature is 385 • C for the sintering process. This is compared with [34], in which the nickel was added up to 20% of the weight and where they reached 357 • C. The increase in sintering temperature for the present alloy is due to the addition of the Ti and Cu mixed in the matrix.…”

Effect of Preparation Acetone on Fish Bones Synthesized Through Sintering Method to Improve Hydroxyapatite Characteristics

“…The effect of sintering on grain size depends on the process of necking formation. The formation of necking occurs as a result of sintering and diffusion driven by the desire of particles to minimize energy [63]. For the sintering process, there are three important stages, namely the initial stage, the intermediate stage, and the final stage.…”