Marco Haesche Dirk Lehmhus Jorg Weise Manfred Wichmann Irene Cristina
材料科学技术（英文）
Replacement of TiH2 as foaming agent by CaCO3 (lime) and CaMg(CO3)2 (dolomite) for AlMg4.5- and AlSi9Cu3-foams was investigated considering influences on foaming capability and cellular structure. Precursor materials were produced from alloy chip and powder mixtures by means of the thixocasting process. AlSi9Cu3 variants showed expansion levels sufficient for commercial use. Variations in expansion observed when CaCO3 and CaMg(CO3)2 were compared as foaming agent are explained based on the course of decomposition. Improved performance of dolomite-based foams relies on formation of stabilizing MgO phases, which do not develop during decomposition of CaCO3 in Al-Si-Cu alloys
关键词:
Aluminium foam
,
foaming agent
,
calcium carbonate
,
dolomite
,
stabilisation
宋杰光
,
王芳
,
王瑞花
,
杜大明
,
马明亮
,
李世斌
,
纪岗昌
,
陈斐
人工晶体学报
采用共沉淀法合成YAG粉体,经过配料、干压成型和真空烧结制备YAG多孔陶瓷材料,并研究发泡剂含量对YAG多孔陶瓷的性能影响.结果表明:YAG多孔陶瓷随着发泡剂含量逐渐增多,其气孔率逐渐增高,抗压强度逐渐降低.烧结温度升高,气孔率下降,抗压强度升高.保温时间延长,气孔率降低,抗压强度升高,但是YAG多孔陶瓷的性能对于烧结温度和保温时间而言,烧结温度相对更为敏感.综合整个烧结工艺及性价比,YAG多孔陶瓷发泡剂含量为15wt％并在1550℃烧结保温lh较为适宜.
关键词:
YAG多孔陶瓷
,
发泡剂
,
气孔率
,
抗压强度
