Effect of melt superheated treatment on glass forming ability and thermal expansion of Gd55Al25Cu10Co10 alloys

Influence of melt superheat treatment on corrosion resistance of Gd-based BMG in 3.5% NaCl solution

“…Heat treatment can modify the microstructures including changes in corrosion resistance [13]. Therefore, after superheat treatment, the structures of Gd-based BMG become more homogenous verified by HRTEM in our previous work [17], and the corrosion products on the surface of Gd-based BMG exhibit better orderliness which are in accord with the homogeneous microstructure.…”

“…Then the Gd 55 Al 25 Cu 10 Co 10 metallic glass rods of 2mm in diameter were prepared using copper mold blow casting method at different superheat temperatures which were tested by infrared thermometer HT-300B. The amorphous structures of alloy rods were ensured by X-ray diffractometry (XRD) in our previous work [17]. The silicone gel on the specimens was removed and the specimens were ultrasonic oscillations cleaned in ethanol.…”

“…The short-range order can be altered by heating the melt up to a sufficient high temperature, also the microstructure and properties of solid alloys can be modified [16,17,25]. In our previous work, it is found that with increasing superheat temperature, the size of local ordering regions in Gd-based BMG gradually decreases and is minimal at 1105℃, the GFA increases and reaches the maximum at 1105℃ [17]. Besides, there is a good correlation between corrosion resistance and GFA that the larger GFA corresponds to the stronger corrosion resistance [21].…”

“…Some efforts have been made to study the influence of superheat treatment on glass-forming ability and thermal expansion of Gd-based BMG in our previous work [17]. Given the huge potential in application of Gd-based BMG, corrosion is inevitable especially in neutral environment, which is one of the most common corrosion environments.…”

Effect of overheating-induced minor addition on Zr-based metallic glasses

“…[1] The disordered atomic structures of MGs result in many unachievable properties with crystalline alloys, such as high strength, [2][3][4][5][6] large elastic limit, [7][8][9] and thermal-plastic formability. [10][11][12] Because the atomic structures of MGs are believed to depend on thermal history, [13] many efforts have been devoted to the investigation on the effects of melt treatment, in particular, overheating and quenching temperature, T q , on thermal stability, [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] glass formation ability (GFA), [31][32][33][34][35][36] magnetic [37][38][39][40] and mechanical properties, [27,28,[41][42][43][44] and corrosion resistance. [45,...…”