Effects of a small amount of Si or Ge addition on stability and hydrogen-induced internal friction of Ti34Zr11Cu47Ni8 glassy alloys |
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| Affiliation: | 1. Department of Civil and Environmental Engineering, FAMU-FSU College of Engineering, Tallahassee, FL, 32310, United States;2. School of the Environment, Florida A&M University, Tallahassee, FL, 32307, United States;3. Savannah River Ecology Laboratory, University of Georgia, Aiken, SC, 29802, United States;4. Department of Biological System Engineering, Florida A&M University, Tallahassee, FL, 32307, United States;1. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, Shanxi, PR China;2. University of Chinese Academy of Sciences, Beijing 100049, PR China;3. Dalian National Laboratory for Clean Energy, Dalian 116023, PR China;1. National Engineering Laboratory for Methanol to Olefins, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, PR China;2. Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, PR China;3. Graduate University of Chinese Academy of Sciences, Beijing 100049, PR China;1. School of Geography, Liaoning Normal University, Dalian 116029, China;2. Dalian Naval Academy, Dalian 116018, China |
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| Abstract: | Effects of a small amount of Si or Ge addition on stability and hydrogen-induced internal friction behavior of Ti34Zr11Cu47Ni8 glassy alloys have been investigated by X-ray diffraction, thermal analysis and temperature dependence of internal friction. It is found that the addition of 1 at.% Si, 2 at.% Si or 1 at.% Ge is effective to stabilize the glassy state and that Si is more effective than Ge. The peak internal friction of the single glassy phase alloy increases with increasing hydrogen content below about 20 at.% H. It is found that (Ti34Zr11Cu47Ni8)99Si1 glassy alloys have lower peak internal friction than the Ti34Zr11Cu47Ni8 glassy alloys, while (Ti34Zr11Cu47Ni8)98Si2 and (Ti34Zr11Cu47Ni8)99Ge1 glassy alloys have much higher peak internal friction. It should be noted that a (Ti34Zr11Cu47Ni8)98Si2 glassy alloy containing 14.4 at.% H shows high internal friction, Q−1 of about 4 × 10−2. The peak temperature of the single glassy phase alloys decreases with increasing hydrogen content below about 20 at.%. It should be noted that the addition of an extremely small amount of Si is effective to increase the peak temperature of the single glassy phase alloys. The relationship between the tensile strength and specific damping capacity indicates that the hydrogenated (Ti34Zr11Cu47Ni8)98Si2 glassy alloys have almost the same potential for a damping material as crystalline Mn–Cu–Al and Cu–Al–Ni alloys and hydrogenated Zr–Cu–Al glassy alloys. |
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