Interfacial reactions and wetting in Al-Mg/oxide ceramic interpenetrating composites made by a pressureless infiltration technique
Interfacial reactions and wetting in Al-Mg/oxide ceramic interpenetrating composites made by a pressureless infiltration technique
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DOI：
10.1016/j.compscitech.2012.02.018
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发表时间：
2012-05-02
影响因子：
9.1
通讯作者：
Zhou, Zhaoxia
中科院分区：
文献类型：
--
作者：
Liu, Jing;Sinner, Jon;Zhou, Zhaoxia
本文研究了无压浸渗法制备Al-Mg/氧化物陶瓷互穿复合材料的显微组织。使用Al-10 wt.%具有两种氧化物陶瓷泡沫的镁合金，尖晶石（MgAl 2 O 4）和莫来石（Al 6Si 2 O 13），在915 ℃下在流动的N2气氛中。实现了铝合金完全渗透到陶瓷预制体中，金属相和陶瓷相之间具有良好的结合。该复合材料的特点是由一系列的技术，并与文献中的氧化铝。结果表明，复合材料的金属-陶瓷界面由陶瓷相附近的氧化层和金属相附近的氮化层组成，氮化层由Mg3 N2到AlN组成。通过静滴技术研究了添加Mg和N-2对Al在氧化物陶瓷上润湿和粘附的改善，以澄清在界面处形成的化合物有助于自发渗透。(C)2012爱思唯尔有限公司保留所有权利。
The present paper considers the microstructures of Al-Mg/oxide ceramic interpenetrating composites made by a pressureless infiltration technique. The composites were produced using an Al-10 wt.% Mg alloy with two oxide ceramic foams, spinel (MgAl2O4) and mullite (Al6Si2O13), at 915 degrees C in a flowing N-2 atmosphere. Full infiltration of the aluminium alloy into the ceramic preform has been achieved with good bonding between the metal and ceramic phases. The composites were characterised by a range of techniques and compared with those for alumina from the literature. It has been found that the metal-ceramic interface of the composite consisted of an oxide layer near the ceramic phase and a nitride layer from Mg3N2 to AlN near the metal phase. The improvement of Al wetting and adhesion on the oxide ceramics by the addition of Mg and in the presence of N-2 was studied by a sessile drop technique to clarify which compound that formed at the interface contributed to the spontaneous infiltration. (C) 2012 Elsevier Ltd. All rights reserved.