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首页> 外文会议>International Symposium on Metastable and Nano-Materials(ISMANAM-2005); 20050703-07; Paris(FR) >Fe-based bulk metallic glasses with Y addition
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Fe-based bulk metallic glasses with Y addition

机译：含Y的铁基块状金属玻璃

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摘要

This paper aims to study the role of residual vacuum during sample preparation and of quenching rate on glass formation in Fe_(50-x)Cr_(15)Mo_(14)Y_xC_(15)B_6 (x = 0, 2) alloys. The equilibrium phase mixture has been clarified for both alloys, combining X-ray diffraction (XRD) and scanning electron microscopy (SEM) measurements. The beneficial effects of minor addition of Y on the glass formation are evidenced. A high residual vacuum during sample preparation promotes glass formation. Glass transition temperature for amorphous sample containing 2 at.% Y is 881 K and the onset crystallization temperature is 904 K. The melting behavior for both as-cast alloys were measured with high temperature differential scanning calorimeter (HTDSC). Melting starts at 1384 K, ends at 1506 and 1470 K as liquidus temperatures for Fe_(50)Cr_(15)Mo_(14)C_(15)B_6 and Fe_(48)Cr_(15)Mo_(14)Y_2C_(15)B_6 alloys, respectively. The addition of Y leads to a melting behavior of as-cast sample close to eutectic, which enhances glass formation.
机译：本文旨在研究样品制备过程中残余真空和淬火速率对Fe_（50-x）Cr_（15）Mo_（14）Y_xC_（15）B_6（x = 0，2）合金中玻璃形成的作用。结合X射线衍射（XRD）和扫描电子显微镜（SEM）测量，两种合金的平衡相混合物均已澄清。证明了少量添加Y对玻璃形成的有益作用。样品制备过程中的高残留真空会促进玻璃的形成。 Y含量为2 at。％的无定形样品的玻璃化转变温度为881 K，起始结晶温度为904K。两种铸态合金的熔融行为均通过高温差示扫描量热仪（HTDSC）进行测量。 Fe_（50）Cr_（15）Mo_（14）C_（15）B_6和Fe_（48）Cr_（15）Mo_（14）Y_2C_（15）的液相线温度始于1384 K，终止于1506和1470 K B_6合金。 Y的添加导致铸态样品接近共晶的熔融行为，这增强了玻璃的形成。

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