The application of the model equation method in the preparation of porous copper by using needlelike and spherical carbamide as a space holder

ABSTRACT

The measurement and predictive functions of the model equation method in the preparation of porous copper were studied. Needlelike and spherical carbamide was used as a space holder with volume content between 10 and 80%. One step of heat treatment for green compacts was applied to fabricate porous copper. A criterion for determining the uniformity of external dimensions of porous copper was proposed. The results showed that the mass follows the law of conservation and the height of porous copper decreased as the increase of spacer content while there was no regularity for the diameter. The porosity of porous copper calculated by the model equation method was equal to those of by the mass volume method. The theoretical formula obtained to describe the relationship between porosity and spacer content of porous copper intersects with the empirical formula. The results indicated that the measurement function of the model equation method was easier to play than the prediction function.

KEYWORDS:

• Powder metallurgy
• porous materials
• space holder technique
• porosity control
• model equation method

Disclosure statement

No potential conflict of interest was reported by the author(s).

Correction Statement

This article has been corrected with minor changes. These changes do not impact the academic content of the article.

Additional information

Funding

This work was supported by Education Department of Jiangxi Province [grant number GJJ200834], [grant number S202110407009].

Notes on contributors

Xiao Jian

Xiao Jian (1989-), male, Doctor, born in Ganzhou, Jiangxi Province, China, mainly engaged in the research of porous materials in powder metallurgy.

Li Xin

Li Xin (1999-), male, Bachelor, Graduated from materials physics.

Cai Yunhe

Cai Yunhe (2000-), male, Bachelor, Graduated from materials physics.

Li Xingting

Li Xingting (2002-), female, Bachelor, Graduated from materials physics.

Lin Yongqiang

Lin Yongqiang (2000-), male, Bachelor, Graduated from metal material engineering.

Xi Jintao

Xi Jintao (2000-), male, Bachelor, Graduated from materials physics.