(1. 河南理工大學(xué) 材料科學(xué)與工程學(xué)院，焦作 454000；
2. 燕山大學(xué) 亞穩(wěn)材料制備技術(shù)與科學(xué)國(guó)家重點(diǎn)實(shí)驗(yàn)室，秦皇島 066004；
3. 河南理工大學(xué) 物理化學(xué)學(xué)院，焦作 454000)
摘 要: 利用電弧爐制備一系列(Zr51.6Cu48.4)100−xAlx(x=6.0~10.0, 摩爾分?jǐn)?shù)，%)大塊非晶合金，利用示差掃描量熱儀、X射線衍射儀和金相顯微鏡研究Al的含量對(duì)其非晶形成能力的影響。結(jié)果表明：當(dāng)鋁的含量為9.0%時(shí)，合金具有最優(yōu)的非晶形成能力。適量鋁的加入不僅能夠抑制初生相CuZr的析出，而且還能有效地抑制其長(zhǎng)大。臨界冷卻速率的經(jīng)驗(yàn)公式計(jì)算結(jié)果顯示該合金的臨界冷卻速率為10 K/s，室溫壓縮力學(xué)性能顯示其斷裂強(qiáng)度為1.9 GPa，且有0.5%的塑性變形，斷裂方式為韌性剪切斷裂。
關(guān)鍵字: 大塊非晶合金；非晶形成能力；臨界冷卻速率；力學(xué)性能
Zr47Cu44Al9 bulk metallic glass
（1. School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China;
2. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University,
Qinhuangdao 066004, China;
3. School of Physics and Chemistry, Henan Polytechnic University, Jiaozuo 454000, China）
Abstract:Bulk metallic glasses (BMG) (Zr51.6Cu48.4)100−xAlx(x=6−10, molar fraction, %) were prepared by copper mould casting. The effect of Al content on the glass-forming ability (GFA) of ZrCu based metallic glass alloys was investigated by differential scanning calorimetry, X-ray diffractometry, and optical microscopy. The results show that when the Al content is 9.0%, the alloy has the optimal GFA. Proper Al additions can suppress the precipitation and the growth of the primary CuZr phase. The critical cooling rate of the Zr47Cu44Al9 alloy is about 10 K/s. The compression strength is about 1.9 GPa and the elongation is about 0.5%. The surface morphology of fracture shows a clear vein pattern.
Key words: bulk amorphous alloy; glass forming ability; critical cooling rate; mechanical properties
