TY - JOUR
T1 - Micro-mechanical properties and corrosion resistance of Zr55Cu30Al10Ni5 bulk metallic glass fabricated by spark plasma sintering
AU - Chang, Zexin
AU - Wang, Wenxian
AU - Ge, Yaqiong
AU - Zhou, Jun
AU - Dong, Peng
AU - Cui, Zeqin
N1 - Funding Information:
The authors are grateful for the generous supports for this study from the National Natural Science Foundation of China (Grant No. 51405324 and 51775366 ).
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2019/4/5
Y1 - 2019/4/5
N2 - Bulk Zr55Cu30Al10Ni5 metallic glasses were fabricated by spark plasma sintering (SPS) of gas-atomized alloy powders and their micro-mechanical and electrochemical characteristics were investigated. The XRD and DSC results showed the sintered samples were nearly fully amorphous when sintering temperature was below material's glass transition temperature (Tg). However, partial crystallization occurred when the sintering temperature was increased above Tg. Nanoindentation test results showed that micro-mechanical characteristics of the sintered samples improved with increasing sintering temperature. The sample sintered above Tg (at 703 K) exhibited the highest hardness, elastic modulus, and fracture toughness among all the ones sintered at various temperatures, owning to the formation of thermodynamically stable intermetallic phases and annihilation of free volumes during the sintering process. Electrochemical performance of the sintered sample was also found enhanced with increasing sintering temperature. However, when the sintering temperature was above Tg, the electrochemical performance of the sintered sample was significantly weakened due to the formation of crystalline phases. The sample sintered just below Tg (at 683 K) was found to have the best thermal, micro-mechanical, and electrochemical characteristics among all the ones sintered.
AB - Bulk Zr55Cu30Al10Ni5 metallic glasses were fabricated by spark plasma sintering (SPS) of gas-atomized alloy powders and their micro-mechanical and electrochemical characteristics were investigated. The XRD and DSC results showed the sintered samples were nearly fully amorphous when sintering temperature was below material's glass transition temperature (Tg). However, partial crystallization occurred when the sintering temperature was increased above Tg. Nanoindentation test results showed that micro-mechanical characteristics of the sintered samples improved with increasing sintering temperature. The sample sintered above Tg (at 703 K) exhibited the highest hardness, elastic modulus, and fracture toughness among all the ones sintered at various temperatures, owning to the formation of thermodynamically stable intermetallic phases and annihilation of free volumes during the sintering process. Electrochemical performance of the sintered sample was also found enhanced with increasing sintering temperature. However, when the sintering temperature was above Tg, the electrochemical performance of the sintered sample was significantly weakened due to the formation of crystalline phases. The sample sintered just below Tg (at 683 K) was found to have the best thermal, micro-mechanical, and electrochemical characteristics among all the ones sintered.
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U2 - 10.1016/j.jallcom.2018.11.377
DO - 10.1016/j.jallcom.2018.11.377
M3 - Article
AN - SCOPUS:85057492819
SN - 0925-8388
VL - 780
SP - 220
EP - 227
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -