abstract

• This paper reports the effects of different process control agents (PCA) (methanol, n-heptane, and stearic acid) and aluminum concentration (x = 0.5, 1.0, and 1.5 at%25) on the particle size distribution, structure, microstructure, stability, and prediction of phases in AlxCoCrFeMnNi high-entropy powder synthesized by mechanical alloying. The results showed that the vapor pressure, the polar nature of the different process control agents used, and type of milling (dry/wet) generating changes in the particle size distribution, microstructure, and crystalline structure since the use of PCA modifies the balance between the cold-welding and fracture processes. Quantitative analysis showed that the PCA chemical decomposition generated residual oxygen and carbon in all systems. X-ray diffraction showed that all systems present a mixture of crystal structures BCC-FCC with nanometric crystallite size, and the peak intensities changed in function of lattice deformation generated by type milling employed. On the other hand, the results also showed that the boundary between BCC-FCC and FCC regions is even broader and extends to higher Al concentration than those reported by the valence electron concentration criterion. © 2021 Elsevier B.V.

authors

• Cruz Rivera José de Jesús
• Estrada-Guel I.
• Garay-Reyes C.G.
• Gutiérrez Castañeda Emmanuel José
• Gómez-Esparza C.D.
• Hernández Rivera José Luis
• Martínez-Sánchez R.
• Ruiz-Esparza-Rodríguez M.A.

publication date

• 2021-01-01

funding provided via

• Consejo Nacional de Ciencia y Tecnología, CONACYT  Grant

published in

• Journal of Alloys and Compounds  Journal

keywords

• Aluminum concentration; AlxCoCrFeMnNi high-entropy alloy; Carbon interstitial-oxygen interstitial; Mechanical alloying; Process control agent Aluminum; Aluminum alloys; Carbon; Chemical analysis; Chromium alloys; Cobalt alloys; Crystal structure; Crystallite size; Entropy; Iron alloys; Light transmission; Mechanical alloying; Microstructure; Milling (machining); Particle size; Particle size analysis; Process control; Size distribution; Al-concentration; Aluminium concentration; Alxcocrfemnni high-entropy alloy; Carbon interstitial-oxygen interstitial; High entropy alloys; Mechanical; Mechanically alloyed; n-Heptanes; Particles-size distributions; Process control agents; High-entropy alloys

Digital Object Identifier (DOI)

• 10.1016/j.jallcom.2021.160770

PubMed ID

start page

end page

volume

• 882

issue