A study of amorphous alloys of Au with group III A elements (Y and La) formed by a solid-state diffusion reaction

Mechanically induced solid-state amorphization

“…A free-energy diagram can successfully predict the products that are a result of SARR for the initial and final products evaluated at the reaction temperature [6,17]. The free enthalpy of the equilibrium crystalline state (G x ) is always much lower than that of the amorphous state (G a ) for metallic systems below the melting temperature (T m ).…”

“…17 Effect of the rod-milling time on the layer thickness distribution of mechanically alloyed Al 50 Hf 50 powders. After El-Eskandarany[34].…”

“…44 XRD patterns of (Fe 0.75 Zr 0.25 ) 85 B 15 samples in the as-milled state and after 7.2 ks annealing at 728 K. After Schultz[17].…”

Phase transformation and microstructural evolution in solder joints

“…The interfacial reactions in the Sn/Ni7wt.%V at 200°C are unique in the case of either the formation of an amorphous phase or the formation of nano-size grains. The solid-state amorphization reactions are observed only in few systems, [17][18][19][20][21][22][23][24][25][26][27][28][29][30] and are likely to be found only in the Sn/Ni-7wt.%V solder couples. Figure 10 is the BEI of the Sn/Ni7wt.%V couple reacted at 200°C for 72 h. 31 Four reaction phases are observed.…”

Amorphous Phase Formation in Solid State Reactions of Layered Nickel Zirconium Films

“…The recent discovery [1,2] that amorphous alloys can result from solid state reactions of elemental crystalline layers has generated interest in the fundamental nature of this process, as well as excitement over the possibility of its practical application for formation of bulk amorphous materials. Nucleation and growth of crystalline phases must be suppressed during amorphous phase formation.…”