当前位置：
X-MOL 学术
›
Cryst. Growth Des.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Fabrication of Gasar Porous Mg–Ag Alloys by Metal–Gas Eutectic Directional Solidification Method
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2023-10-04 , DOI: 10.1021/acs.cgd.3c00975 Endian Liu 1, 2 , Pangwei He 1 , Zaijiu Li 1 , Chengling Wu 3 , Manmen Liu 4
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2023-10-04 , DOI: 10.1021/acs.cgd.3c00975 Endian Liu 1, 2 , Pangwei He 1 , Zaijiu Li 1 , Chengling Wu 3 , Manmen Liu 4
Affiliation
|
Gasar porous Mg–Ag alloys exhibit competitive potential as biomaterials and as precursors for catalytic materials; their practical performances mainly depend on the pore structure inner porous alloys. In this paper, Gasar porous Mg–xAg alloys (with Ag contents of 0.5, 8.32, and 17.57 atom %) corresponding to the single-phase, subeutectic, and eutectic composition were prepared by a metal–gas eutectic directional solidification method. The effects of the Ag content level on the solidification microstructure and the pore growth behavior were investigated. The porosities decrease as the silver content level increases. The pore shape is changed from regular in Mg99.5Ag0.5 to irregular in Mg91.68Ag8.32 and then regular again in Mg82.43Ag17.57. The integrity of the pores changed from good to poor in the order of Mg82.43Ag17.57, Mg99.5Ag0.5, and Mg91.68Ag8.32, which was closely related to the width of the corresponding mushy zone from narrow (0 of eutectic composition) to wide. The width of the mushy zone with different silver contents was quantified by combining finite element simulations, and the orientation of the solidification microstructure of each alloy was analyzed. The random orientation of a solidification microstructure will hinder the growth of pores and cut off the correlation between the growth direction of pores and the solidification direction.
中文翻译：
金属-气体共晶定向凝固法制备Gasar多孔镁银合金
Gasar 多孔镁银合金作为生物材料和催化材料前体表现出竞争潜力；其实际性能主要取决于内部多孔合金的孔结构。本文采用金属-气体共晶定向凝固法制备了单相、亚共晶和共晶成分的Gasar多孔Mg- x Ag合金（Ag含量分别为0.5、8.32和17.57原子%）。研究了Ag含量水平对凝固微观结构和气孔生长行为的影响。孔隙率随着银含量水平的增加而降低。孔形状从Mg 99.5 Ag 0.5中的规则变为Mg 91.68 Ag 8.32中的不规则，然后在Mg 82.43 Ag 17.57中再次规则。孔隙完整性由好到差依次为Mg 82.43 Ag 17.57、Mg 99.5 Ag 0.5、Mg 91.68 Ag 8.32，这与相应糊状区的宽度由窄（共晶成分为0）密切相关。至宽。结合有限元模拟对不同银含量的糊状区宽度进行量化，并对各合金的凝固组织取向进行分析。凝固组织的随机取向会阻碍气孔的生长，切断气孔生长方向与凝固方向的相关性。
更新日期：2023-10-04
中文翻译：
金属-气体共晶定向凝固法制备Gasar多孔镁银合金
Gasar 多孔镁银合金作为生物材料和催化材料前体表现出竞争潜力；其实际性能主要取决于内部多孔合金的孔结构。本文采用金属-气体共晶定向凝固法制备了单相、亚共晶和共晶成分的Gasar多孔Mg- x Ag合金（Ag含量分别为0.5、8.32和17.57原子%）。研究了Ag含量水平对凝固微观结构和气孔生长行为的影响。孔隙率随着银含量水平的增加而降低。孔形状从Mg 99.5 Ag 0.5中的规则变为Mg 91.68 Ag 8.32中的不规则，然后在Mg 82.43 Ag 17.57中再次规则。孔隙完整性由好到差依次为Mg 82.43 Ag 17.57、Mg 99.5 Ag 0.5、Mg 91.68 Ag 8.32，这与相应糊状区的宽度由窄（共晶成分为0）密切相关。至宽。结合有限元模拟对不同银含量的糊状区宽度进行量化，并对各合金的凝固组织取向进行分析。凝固组织的随机取向会阻碍气孔的生长，切断气孔生长方向与凝固方向的相关性。
京公网安备 11010802027423号