(江蘇大學(xué) 材料科學(xué)與工程學(xué)院，鎮(zhèn)江 212013)
摘 要: 采用差示掃描量熱儀(DSC)在不同加熱速率下研究Mg60Cu30Y10塊體非晶合金及CuYSi-Mg60Cu30Y10復(fù)合材料，并利用Kissinger以及Doyle方法研究CuYSi顆粒生成后對(duì)塊體非晶合金變溫晶化行為的影響。結(jié)果表明：CuYSi顆粒生成后，復(fù)合材料的變溫晶化行為依然具有動(dòng)力學(xué)效應(yīng)，但生成的CuYSi顆粒減小了復(fù)合材料玻璃轉(zhuǎn)變行為對(duì)升溫速率的依賴程度；同時(shí)，顆粒的生成增加了復(fù)合材料發(fā)生玻璃轉(zhuǎn)變以及起始晶化時(shí)所需要克服的能量勢(shì)壘，提高了材料的熱穩(wěn)定性；局域晶化激活能隨著復(fù)合材料晶化體積分?jǐn)?shù)的增加而減小。
關(guān)鍵字: 塊體非晶合金復(fù)合材料；晶化動(dòng)力學(xué)；激活能
（School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China）
Abstract:Differential scanning calorimeter (DSC) was used to investigate the Mg60Cu30Y10 bulk amorphous alloy and CuYSi-Mg60Cu30Y10 reinforced composite at different heating rates. The influence of CuYSi particles on crystallization behavior of the bulk amorphous alloy was studied by Kissinger’s and Deloy’s method. The results show that the kinetics effect on crystallization behavior is preserved for both Mg60Cu30Y10 bulk amorphous alloy and its CuYSi reinforced composite. However, CuYSi particle distribution in the glass matrix reduces the influence of the heating rate on the glass transition of the composite, while increases the energy barrier for the glass transition and the crystallization, thus improves the thermal stability. The local area activation energy decreases with increasing crystallization volume of the amorphous alloy matrix composite.
Key words: bulk amorphous alloy matrix composite; crystallization kinetics; activation energy
