Work

Highly Porous Co-Al Intermetallic Created by Thermal Explosion Using NaCl as a Space Retainer

Year: 2024

Type: article

Abstract: Co-Al porous materials were fabricated by thermal explosion (TE) reactions from Co and Al powders in a 1:1 ratio using NaCl as a space retainer. The effects of the NaCl content on the temperature profiles, phase structure, volume change, density, pore distribution and antioxidation behavior were investigated. The results showed that the sintered product of Co and Al powders was solely Co-Al intermetallic, while the final product was Co4Al13 with an abundant Co phase and minor Co2Al5 and Co-Al phases after added NaCl dissolved out, due to the high Tig and low Tc. The open porosity of sintered Co-Al compound was sensibly improved to 79.5% after 80 wt.% of the added NaCl dissolved out. Moreover, porous Co-Al intermetallic exhibited an inherited pore structure, including large pores originating from the dissolution of NaCl and small pores in the matrix caused by volume expansion due to TE reaction. The interconnected large and small pores make the open cellular Co-Al intermetallic suitable for broad application prospects in liquid–gas separation and filtration.

Source: Materials

DOI: 10.3390/ma17174380

Authors: Yonghao Yu, Dapeng Zhou, Lei Qiao, Peizhong Feng, Xueqin Kang, Chunmin Yang

Institutions: China University of Mining and Technology, China Coal Technology and Engineering Group Corp (China), Xuzhou Construction Machinery Group (China)

Language: English

Topic: Intermetallics and Advanced Alloy Properties

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,955

Funder: Fundamental Research Funds for the Central Universities