65-x(Al0.21Ni0.29Cu0.04Ag0.46)35+x(x=0,7.5,15.0,22.5)的金屬玻璃,重點分析了組分濃度對合金熱穩(wěn)定性、熱誘導(dǎo)沉淀相以及力學(xué)性能的影響。結(jié)果表明,隨著合金組分濃度的增加,非晶漫散射峰的峰位向更高角度偏移,出現(xiàn)了玻璃轉(zhuǎn)變現(xiàn)象。隨著玻璃轉(zhuǎn)變溫度(Tg)和晶化溫度(Tx)增加,液相線溫度(Tl)降低,導(dǎo)致Tx和Tg之間的溫度差(ΔTx)減小,約化玻璃轉(zhuǎn)變溫度(Trg)增大。此外,形核激活能(Ex)和長大激活能(Ep1)隨著溶質(zhì)濃度的增加而增加。初晶從四方Zr2Ni、Zr2(Cu, Ag)、ZrAg和六方Zr5Al3相的組合轉(zhuǎn)變?yōu)閱我凰姆絑rAg相,維氏硬度呈現(xiàn)出增加的趨勢。通過研究,發(fā)現(xiàn)了具有141 K過冷液相區(qū)(ΔTx)和高熱穩(wěn)定性的新型金屬玻璃Zr65-x(Al0.21Ni0.29Cu0.04Ag0.46)35+x(x=7.5),且具有較強(qiáng)的抵抗晶化的特性。本研究采用的多組元替換策略對提高金屬玻璃的熱穩(wěn)定性具有重要意義。;In order to improve the thermal stability and to obtain a large supercooled liquid region of metal glasses, the Zr65-x(Al0.21Ni0.29Cu0.04Ag0.46)35+x (x=0, 7.5, 15.0, 22.5) metallic glasses were investigated. The effects of component concentrations on the thermal stability, heat-induced precipitate phases, and mechanical properties were analyzed. Results show that with increasing the component concentrations, the peak position of the broad diffraction pattern shifts towards higher angles, indicating the occurrence of glass transition phenomenon. With increasing the glass transition temperature (Tg) and crystallization temperature (Tx), the liquidus temperature (Tl) is decreased, leading to decrease in the temperature difference (namely supercooled liquid region, ΔTx) between Tx and Tg and resulting in the increase in reduced glass transition range (Trg). Additionally, the nucleation activation energy (Ex) and the growth activation energy (Ep1) are increased with increasing the solute concentration. The primary crystal changes from the combination of tetragonal Zr2Ni, Zr2(Cu, Ag), ZrAg, and hexagonal Zr5Al3 phases into the single tetragonal ZrAg phase. The Vickers hardness is also increased with increasing the solute concentration. In this research, a novel metallic glass, Zr65-x(Al0.21Ni0.29-Cu0.04Ag0.46)35+x (x=7.5), is developed, which presents a large ΔTx of 141 K, high thermal stability, and strong crystallization resistance. This research adopting the multicomponent replacement strategy is of great significance to improve the thermal stability of metallic glasses."/>
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