Novel approach for fabrication and characterisation of porosity-graded material

被引：5

作者：

Liu, Chao ^{[1
]}

Liu, Yang ^{[1
]}

Liang, Chaoping ^{[1
]}

Ma, Yunzhu ^{[1
]}

Liu, Wensheng ^{[1
]}

Yang, Yuling ^{[1
]}

Cai, Qingshan ^{[1
]}

Tang, Siwei ^{[1
]}

机构：

[1] Cent S Univ, Natl Key Lab Sci & Technol Natl Def High Strength, Changsha, Hunan, Peoples R China

来源：

MATERIALS SCIENCE AND TECHNOLOGY | 2019年 / 35卷 / 13期

关键词：

Porosity-graded structure; powder metallurgy; porosity-graded material; interfacial transition layer; modulus; mechanical properties; density; hardness; elastic modulus; ALUMINUM; MICROSTRUCTURE; COMPOSITES; COATINGS; FOAMS; BEAMS;

D O I：

10.1080/02670836.2019.1631945

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A novel continuously graded material that is based on a porosity-graded structure was successfully synthesised via a cold pressing-vacuum sintering-dissolution process (SDP) of powder metallurgy technology. Microscopic observations and the Archimedes method were used to confirm the newly synthesised porosity-graded material, the mechanical properties and the modulus. The results show that the density continuously increased from 1.4 to 2.7 g cm(-3), and there was no obvious interfacial transition layer. In addition, the hardness and elastic modulus were obtained from nanoindentation tests and display a stepwise feature along the gradient direction. Moreover, we found that the fractography changes from typical ductile fracture to ductile and cleavage fracture with an increase in the porosity. [GRAPHICS] .

引用

页码：1583 / 1591

页数：9

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