超声对镁基块体非晶合金组织及性能的影响
The effect of ultrasonic wave on the structure and properties of Mg-based bulk amorphous alloy
黄康
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作者单位：江苏大学材料学院
中文关键字：镁基块体非晶合金；超声处理；晶化；热稳定性
英文关键字：Mg-based bulk amorphous alloy;ultrasonic processing;crystallization;thermal stability
中文摘要：摘要：采用普通铜模浇铸法制备Mg65Cu25Y10块体非晶合金试样，并用XRD（X射线衍射仪）表征其非晶特性。取非晶合金试样分别于室温（22℃）、120℃和160℃下作超声处理2min，并运用XRD、SEM（扫描电子显微镜）、维氏硬度计和DSC（差示扫描量热仪）分别对相组成、微观形貌、力学性能和热稳定性的变化进行分析。研究表明，在超声的作用下，Mg65Cu25Y10块体非晶合金快速发生晶化，析出Mg2Cu、Mg24Y5、Mg和Cu2Y等晶体相，维氏硬度增大，热稳定性提高。
英文摘要：Abstract: The specimens of Mg65Cu25Y10 bulk amorphous alloy prepared by conventional copper mould method was examined by XRD(X-ray diffractometer), and was then treated by ultrasonic wave at room-temperature(22℃), 120℃ and 160℃, respectively, for 2min. The XRD, SEM(Scanning Electron Microscope), Vickers Hardness Tester and DSC(Differential Scanning Calorimeter) were employed to analyse the variation on phase contents, microstructure, mechanical property and thermal stability, respectively, of the specimens. It was clear that the crystallization of the Mg65Cu25Y10 bulk amorphous alloy would happen rapidly with ultrasonic processing, and the Mg2Cu, Mg24Y5, Mg and Cu2Y et al. could be separated out. Vickers hardness increased, and thermal stability was improved.