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首页> 外文期刊>Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing >Mg alloy infiltrated Si-O-C ceramic foams
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Mg alloy infiltrated Si-O-C ceramic foams

机译：镁合金浸润的Si-O-C陶瓷泡沫

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摘要

Magnesium alloys reinforced with an open cell ceramic foam form interpenetrating phase composites that offer improved strength and creep resistance at elevated temperatures. Open cell polymer derived Si/SiC/Si-O-C ceramic foams were fabricated from Si/SiC loaded poly(silsesquioxane) by an in situ foaming process at 270 deg C followed by pyrolysis at 1000 deg C in inert atmosphere. The ceramic foams are characterized by a high interconnectivity of the foam cells and a pore diameter ranging from 0.5 to 2.0 mm. The compression strength exceeds 4MPa at a fractional density of 27 percent. Interpenetrating AZ91 Mg alloy/ceramic foam composites were manufactured by squeeze casting. Interface bonding between the metal phase and the ceramic skeleton was triggered by controlled pre-oxidation annealing of the ceramic foam and gave rise for significant improvement of the crushing strength.
机译：用开孔陶瓷泡沫增强的镁合金形成互穿相复合材料，在高温下具有增强的强度和抗蠕变性。开孔聚合物衍生的Si / SiC / Si-O-C陶瓷泡沫是由负载有Si / SiC的聚倍半硅氧烷通过在270℃下原位发泡过程，然后在惰性气氛下在1000℃下热解制备的。陶瓷泡沫的特征在于泡沫孔的高互连性和0.5至2.0mm的孔径。在27％的密度下，抗压强度超过4MPa。互渗AZ91镁合金/陶瓷泡沫复合材料是通过挤压铸造制造的。金属相与陶瓷骨架之间的界面键合是通过陶瓷泡沫的受控预氧化退火来触发的，从而显着提高了压碎强度。

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