Microstructure homogeneity of milled aluminum A356–Si3N4 metal matrix composite powders | Zendy

Heydi Fernández | Zendy; S. Ordóñez | Zendy; Héctor Pesenti | Zendy; Rodrigo Espinoza-González | Zendy; Matteo Leoni | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

Microstructure homogeneity of milled aluminum A356–Si3N4 metal matrix composite powders

Author(s) -

Heydi Fernández,

S. Ordóñez,

Héctor Pesenti,

Rodrigo Espinoza-González,

Matteo Leoni

Publication year - 2019

Publication title -

journal of materials research and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.832

H-Index - 44

eISSN - 2214-0697

pISSN - 2238-7854

DOI - 10.1016/j.jmrt.2019.05.004

Subject(s) - materials science , crystallite , microstructure , alloy , composite number , dislocation , aluminium , homogeneity (statistics) , sintering , powder diffraction , powder metallurgy , composite material , metallurgy , metal matrix composite , diffraction , matrix (chemical analysis) , crystallography , statistics , chemistry , mathematics , physics , optics

A metal matrix composite was produced by co-milling an A356 aluminum alloy powder obtained by rotating electrode off-equilibrium solidification, with different mass fractions (10, 20 and 30%) of Si3N4. The structural and microstructural modifications occurring during the milling were investigated with X-ray powder diffraction (XRPD). Whole powder pattern modeling (WPPM) of the XRPD reveals the inhomogeneous nature of the material in terms of silicon content and allows the crystallite size distribution and dislocation content to be followed in detail for all phases present in the powder. Neither microscopy nor the traditional Scherrer equation can reveal such a detailed picture in this case. Short milling times are sufficient to homogenize the microstructure and to obtain nanoscale crystallites. Long milling times are advantageous to increase the dislocation density that might be favorable for subsequent sintering.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research