Ostwald ripening of rod-shaped α-Fe particles in a Cu matrix

Abstract

The coarsening behavior of rod-shaped α-Fe particles in Cu−1.3 wt% Fe and Cu−1.3 wt% Fe−1.2 wt% Sb alloys during aging at 700 °C has been studied by transmission electron microscopy and electric resistivity. The kinetics of the decay of supersaturation with aging

Grain Refinement of Deoxidized Copper

“…Structural characterization by TEM [40] in a Cu-1Fe alloy identified rod-shaped a-Fe particles and by SEM [38] and TEM [41] in the bulk of a CuFe2P alloy (97.0min.Cu-2.1-2.6Fe-0.05-0.20Zn-0.03-max.Pb-0.015-0.15P-0.2max.others (wt pct)) reported also iron-containing intermetallic particles. The CuFe2P alloys of Reference 41 had P contents in the base compositions of 0.065 and 0.053 pct.…”

“…The effects of the de-embrittling elements of copper-B, Mg, Ca, Zr, and Ti-in concentrations of 0.085-0.17 pct without the addition of Ag and cast at 1423 K (1150°C) [17] and with the addition of Ag of 150 ppm and cast at 1403 K (1130°C) [18] on the resulting macrostructure of DHP-Cu in general have been summarized in the first part of Table V (casts [31][32][33][34][35][36][37][38][39][40].…”

The effect of aging process on the microstructure and mechanical properties of a Cu–Be–Co–Ni alloy

“…According to Monzen et al [18], precipitates in the Cu-Be-Co-Ni alloy tended to nucleate at the grain boundaries of α phase (solid solution phase). When the alloy reaches the peak aging, those grain boundary precipitates have already coarsened due to the Ostwald ripening [19]. However, in the IA process, the alloy was aged at 320°C for only 30 min, resulting in the microstructure that was mainly composed of dispersed G.P.…”

“…The driving force for the generation of grain boundary precipitates reduces consequently, which is beneficial to the uniform precipitation during the subsequent interrupted aging. Furthermore, due to the relatively low aging temperature (280°C) during the interrupted aging, it is difficult for solute atoms to diffuse, which causes a much slower coarsening rate of γ″ precipitates [19].…”

Coarsening Kinetics of Pb Phase in a Nanocomposite Alloy Produced by Mechanical Alloying in Immiscible Al-Pb System and the Influence of Cu Addition on It

“…All these modern Ostwald ripening theories show that the cubic growth law can still be used for embedded phase of high volume fraction, with the coarsening rate being dependent on the volume fraction [13,14] . In addition, many experiments were performed involving the effect of particle shape [15] and elastic stress [16] , as well as alloying addition [17] . The result shows that the shape of secondary phase has no distinct effect on coarsening kinetics [15] .…”