Phase equilibria and magnetic phases in the Fe-rich regions of the Ce-Fe-{Ni, Si, Al}-B quaternary systems

• Published in: Journal of alloys and compounds Vol. 763; pp. 289 - 295
• Main Authors: Orimoloye, Kayode, Kevorkov, Dmytro, Medraj, Mamoun
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 30.09.2018; Elsevier BV
• Subjects: Alloy systems; Alloys; Aluminum; Ce-Fe-Ni system; Ce-Fe-{Ni, Si, Al}-B quaternary systems; Ce2Fe14B; Cold water; Diffusion; Equilibrium; Iron; Magnetic domains; Magnetic fields; Magnetic phases; Magnetism; Nickel; Phase equilibria; Phase equilibrium; Phases; Quaternary systems; Silicon; Solid solutions; Ce-Fe-{Ni, Si, Al}-B quaternary systems; Ce-Fe-Ni system; Phase equilibrium; Magnetic phases; Ce2Fe14B
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2018.05.329

Fe-rich regions of the Ce-Fe-{Ni, Si, Al}-B quaternary systems were experimentally studied using diffusion couples and selected key alloys. After sufficient annealing of at least 10 days at 900 °C, samples were quenched in a cold water bath. Homogeneity ranges of Ce2(Fe14-xNix)B, Ce2(Fe14-xSix)B and Ce2(Fe14-xAlx)B solid solutions were measured to be (0 ≤ xNi ≤ 1.5), (0 ≤ xSi ≤ 2.33) and (0 ≤ xAl ≤ 2.5), respectively. Quaternary solid solutions Ce(Ni4-xFex)B (0 ≤ x ≤ 0.78) and (Fe1-x-yNixCey)23B6 (0 ≤ y ≤ 0.062, x = 0.832) were also found in the Ce-Fe-Ni-B quaternary system. Except (Fe1-x-yNixCey)23B6, (Fe1-x-ySixCey)23B6 and (Fe1-x-ySixCey)3B, all other quaternary solid solutions observed are in equilibrium with α-Fe. Magnetic force microscopy was used to screen magnetic phases. Among the phases observed in the Fe-rich regions of the Ce-Fe-{Ni, Si, Al}-B quaternary systems, only the quaternary extensions of Ce2Fe14B show visible magnetic domains. •Phase relations in the Fe-rich regions of the Fe-Ce-{Ni,Al,Si}-B systems are established.•Solubility limits of Ni, Al and Si in Ce2Fe14B compound have been determined.•Magnetic phases in these systems have been screened.•Partial isothermal section of the Ce-Fe-Ni system at 700 °C is determined.