放电等离子烧结技术制备Al基非晶合金及其复合材料的研究

项目名称： 放电等离子烧结技术制备Al基非晶合金及其复合材料的研究

项目编号： No.51271036

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 一般工业技术

项目作者： 程兴旺

作者单位： 北京理工大学

项目金额： 80万元

中文摘要： Al基非晶合金与晶态Al合金相比，强度更高，耐腐蚀能力更强，综合性能更加优异，但该合金体系的玻璃形成能力相对较低，只能制备出低维度的非晶合金，这严重制约了Al基非晶合金在实际工程的应用。基于此，本研究拟采用放电等离子烧结（SPS）的方法制备Al基非晶合金，利用非晶合金过冷区间的超塑成形能力，将低维尺寸的非晶合金粉末高温加压固结成型，制备出大尺寸非晶合金。利用该方法制备块体Al基非晶合金主要涉及非晶合金粉末制备和高温固结两个方面的研究内容。一方面，展开利用机械合金化技术制备高纯Al基非晶合金粉末的研究，综合考虑合金粉末特征参数和球磨工艺对非晶化过程的影响规律，揭示非晶化机理；在此基础上，展开利用SPS技术制备大尺寸块体Al基非晶合金及其复合材料的研究，重点考虑SPS工艺参数和非晶合金粉末自身特征对烧结过程的影响规律，阐明烧结机理，为制备出高性能Al基非晶合金提供理论基础和工艺指导。

中文关键词： Al基非晶合金；机械合金化；放电等离子烧结；复合材料；力学行为

英文摘要： Al-based amorphous alloys show higher strength, more resistant to corrosion, and more excellent comprehensive properties than Al alloys. However Al-based amorphous alloys can only be formed in small size due to their extremely low glass-forming ability，restricting the engineering applications of the material. Based on the situation, group intends to prepare Al-based amorphous alloys by spark plasma sintering (SPS). Large size of bulk amorphous alloys could be prepared by mean of consolidating the low dimensional size amorphous powders since their superplastic forming ability in supercooled liquid region. The method of preparing Al-based amorphous alloy involves preparing amorphous powders and consolidating powders. On the one hand, the effects of characteristic parameters of the powders and the technological conditions of ball milling on the process of amorphazition will be investigated and reveal out amorphazition mechanism. On the foundation，the preparation of Al-based bulk amorphous alloy and composite by SPS will be developed, pay much attention to the effects of SPS technological parameter and powder intrinsic characteristics on the process of sintering. Clarify sintering mechanism in order to provide the technological guidance and theoretical foundation for producing Al-based amorphous alloy with high pro

英文关键词： Al-based amorphous alloy；Mechanical alloying；Spark plasma sintering；Composite；Mechanical behaviors