560°C isothermal section of Zn–Fe–Ni system at the Zn-rich corner

Experimental investigation on the phase equilibria of the Mn–Ni–Zn system at 400 °C

“…This case is different to that in the Fe-Ni-Zn system, where both of Ni 2 Zn 11 and Fe 3 Zn 10 have the same space group I43m and form a series of continuous solid solutions [3,39]. As shown in Fig.…”

“…The T phase was indexed to be fcc structure with cell parameter of a = 1.81476 (1) nm. It should be mentioned that ternary compounds with the similar composition and XRD pattern were observed in the Fe-Ni-Zn [3,39], Fe-Ti-Zn [5] and Al-Fe-Zn [6] systems. The T phase in the Fe-Ni-Zn system, having a formula of (FeNi)Zn 6.5 , was determined to belong to the space group of F43m with a lattice parameter of a = 1.80838 (5) nm by using the single crystal method [40].…”

The Zn-rich corner of the 450°C isothermal section of the Zn–Bi–Fe–Ni quaternary system

“…In an effort to better understand the effect of Ni to control the Fe-Zn reactivity, Reumont et al [14] studied the Zn-rich corner of the Zn-Fe-Ni ternary system at 450 • C. Su et al [15,16] investigated the Zn-Fe-Ni ternary system more recently, but the results are different from others. Reumont et al [14] found no new ternary phase and believed that the T phase was simply the extension of the 1 phase of the Zn-Fe binary system.…”

“…Reumont et al [14] found no new ternary phase and believed that the T phase was simply the extension of the 1 phase of the Zn-Fe binary system. But Tang et al [15] and Peng et al [16] found that the T phase is a true ternary compound in the Zn-Fe-Ni system, and the composition range of this phase has been determined. Li et al [17] investigated the 450 • C isothermal section of Zn-Fe-Bi ternary phase diagram using SEM-EDS and X-ray powder diffraction (XRD).…”

Influência do bismuto, níquel, estanho e alumínio na espessura da camada dos revestimentos galvanizados

“…Estas duas fases são termodinamicamente incompatíveis resultando portanto, em aumento da velocidade da reação. Dois métodos são adotados para eliminar a reatividade do silício: um método é galvanizar a temperaturas acima da temperatura peritética de zeta (ξ), onde a fase delta (δ) entra em equilíbrio de fase com o líquido e por isso cresce a uma taxa normal; a outra alternativa é adicionar elementos químicos ao banho de zinco que diminuam a reatividade deste com o aço [23,6]. A primeira alternativa possui um inconveniente, pois ao utilizar temperaturas altas há um aumento do ataque à cuba de zinco devido ao superaquecimento, favorecendo a formação de trincas e falhas prematuras.…”