Novel Separation Technique of Particle Reinforced Metal Matrix Composites by Fused Deposition Method
Novel Separation Technique of Particle Reinforced Metal Matrix Composites by Fused Deposition Method
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DOI：
10.4028/www.scientific.net/msf.539-543.1028
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发表时间：
2007-02
期刊：
影响因子：
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通讯作者：
M. Mizumoto;T. Ohgai;A. Kagawa
中科院分区：
文献类型：
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作者：
M. Mizumoto;T. Ohgai;A. Kagawa
为了发展一种新型的金属基复合材料与基体合金分离技术，对不同类型的颗粒增强金属基复合材料进行了分离实验。采用Al-4mass%Cu合金、Al-7mass%Si合金和铸铁作为基体。SiC颗粒（颗粒尺寸：75μm）和Al 2 O3颗粒（颗粒尺寸：120μm）用作增强体。将PRMMC试样置于底部具有小喷嘴（喷嘴尺寸：0.75mm）的二氧化硅管容器中，并通过H. F.感应加热然后通过施加一定压力的Ar气体迫使熔融的PRMMC试样通过喷嘴流出。大部分熔融基体合金通过喷嘴流出，容器中的剩余部分由增强体和一部分基体合金组成。随着增强相体积分数的降低，基体合金析出量增加。随着制备温度从1273 K降低到1073 K，SiCP/Al-7mass%Si合金复合材料中基体合金的析出量增加。据认为，在1273 K下在SiC颗粒表面上形成的反应层改善了熔融基体合金与SiC颗粒之间的润湿性，这防止了熔融基体合金与增强体的分离。而20vol%Al_2O_3/铸铁复合材料中基体合金的析出量很高，这是由于在Al_2O_3颗粒与铸铁的界面上没有形成反应层。
To develop a novel separation technique of matrix alloys from metal matrix composite, separation experiments for various kinds of particle reinforced metal matrix composites (PRMMCs) were carried out. The Al-4mass%Cu alloy, Al-7mass%Si alloy and cast iron were used as matrix. The SiC particles (particle size: 75μm) and Al2O3 particles (particle size: 120μm) were used as reinforcement. The PRMMC specimen was placed in a silica tube container with a small nozzle (nozzle size: 0.75mm) at the bottom and was melted by H.F. induction heating. Then the molten PRMMC specimen was forced to flow out through the nozzle by applying a certain pressure of Ar gas. Most of the molten matrix alloy flowed out through the nozzle and the remainder in the container consisted of the reinforcements and a part of the matrix alloy. The amount of separated matrix alloy increased with decreasing the volume fraction of reinforcement particles in PRMMC specimens. With decreasing the fabrication temperature from 1273K to 1073K, the amount of matrix alloy separated from SiCP/Al-7mass%Si alloy composites increased. It is considered that a reaction layer formed on the surface of SiC particles at 1273K improves the wettability between the molten matrix alloy and SiC particle, which prevents the separation of molten matrix alloy from reinforcements. On the other hand, the amount of separated matrix alloy from 20vol% Al2O3P/cast iron composites was very high due to no reaction layer formed at interface between Al2O3 particle and cast iron.