Separation of PRMMC into matrix alloy and reinforcements by nozzle filtering method
Separation of PRMMC into matrix alloy and reinforcements by nozzle filtering method
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DOI：
10.1016/j.jmatprotec.2008.11.006
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发表时间：
2009-05
影响因子：
6.3
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
采用低压熔渗工艺（LPI工艺）制备SiCP/Al-4mass%Cu合金复合材料，采用喷嘴过滤法进行重熔分离。在分离过程中，将PRMMC样品放置在底部有小喷嘴的容器中。通过施加一定压力的Ar气，迫使熔融的PRMMC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SiC颗粒和部分基体合金组成。剩余部分的颗粒体积分数高于原始 PRMMC 的颗粒体积分数，剩余部分将充当过滤器，将 SiC 颗粒从基体合金熔体中分离出来。当喷嘴尖端角度为60°至120°时，PRMMC中约80%的基体合金被分离，并且在分离的基体合金中观察到少量SiC颗粒。由于分离过程中与熔融基体的反应，回收的 SiC 颗粒的表面变得轻微粗糙。然而，这预计不会影响它们的重用。
The SiCP/Al–4mass%Cu alloy composites fabricated by a low-pressure infiltration process (LPI process) were remelted and separated by nozzle filtering method. In the separation process, the PRMMC specimen was placed in a container with a small nozzle at the bottom. The molten PRMMC 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 SiC particles and a part of the matrix alloy. The particle volume fraction of the remainder was higher than that of the original PRMMC and the remainder would work as a filter to separate SiC particles from the matrix alloy melt. When nozzle tip angle was ranged from 60° to 120°, about 80% of matrix alloy in the PRMMC was separated and few SiC particles were observed in the separated matrix alloy. The surface of recovered SiC particles became slightly roughened due to the reaction with the molten matrix during the separation process. However, this is not expected to affect their reuse.