Fabrication of Quasicrystalline Scaffolds From the Al-Cu-Fe System by Dynamic Freeze-Casting

被引：0
|
作者：
Laper, Miguel L. [1 ]
Nunes, Eduardo H. M. [1 ,3 ]
Houmard, Manuel [2 ,3 ]
Wolf, Witor [1 ]
机构：
[1] Univ Fed Minas Gerais, Dept Engn Met & Mat, BR-31270901 Belo Horizonte, MG, Brazil
[2] Univ Fed Minas Gerais, Dept Engn Quim, BR-31270901 Belo Horizonte, MG, Brazil
[3] Ctr Tecnol Nanomat & Grafeno CTNano, BR-31310260 Belo Horizonte, MG, Brazil
来源：
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS | 2023年 / 26卷
基金：
巴西圣保罗研究基金会;
关键词：
Quasicrystals; Al-Cu-Fe system; Dynamic freeze-casting; Scaffolds; Structural characterization; ANTIBACTERIAL ACTIVITY; MICROSTRUCTURE; CERAMICS; ALLOYS; FOAM;
D O I：
10.1590/1980-5373-MR-2023-0190
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this study, scaffolds whose main phase is an icosahedral quasicrystal (i-QC) were prepared for the first time by dynamic freeze-casting. Two different metal powders were used here, namely pure aluminum and quasicrystalline particles from the Al-Cu-Fe system. These powers were initially mixed with deionized water, citric acid, and poly(vinyl alcohol). The obtained slurry was frozen while rotating and freeze-dried under vacuum. The green bodies were subsequently heat-treated in a reducing atmosphere. The total porosity and mean pore size evaluated for these scaffolds were 62.4 +/- 3.0% and 67.3 +/- 2.8 mu m, respectively. This is the first time that dynamic freeze-drying has been used in the preparation of QC scaffolds, which reinforces the novelty of this study. In addition, the proposed route is simple, inexpensive, and environmentally friendly, which is also worth highlighting.
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页数：6
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