Microstructure characterization and mechanical properties of Al-matrix composites reinforced by artificially-cultured diatom frustules

Lyu，Sha1; Wang，Yanjing1; Han，He1; Ding，Chao1; Li，Dandan1; Wang，Jaw Kai1,2; Zhang，Jiangtao2; Huang，Jintao1,3; Sun，Dazhi1; Yu，Peng1

2021-08-01

10.1016/j.matdes.2021.109755

Materials and Design   影响因子和分区

0264-1275

1873-4197

In this study, to enhance the understanding of characteristics and interaction of Al-SiO composites manufactured with hot extrusion, artificially-cultured diatom frustules (DFs) reinforced aluminum matrix composites have been manufactured by isostatic cool pressing and hot extrusion process. The effect of DFs content on composite particle characteristics, microstructures, phase distribution, fracture surfaces and mechanical properties of the hot-extruded composites were investigated in details. For hot-extruded Al-DFs composite samples, two typical morphologies of DFs were identified: (a) those with apparent matrix-DFs voids were formed by deformability inconsistency between matrix and reinforcement; (b) those with strong matrix-DFs interfacial integration originated from aggregated nano-sized DFs particles and potential reduction reaction between Al and SiO. Uniform distribution of nano-sized DFs particles surrounding matrix grain boundaries significantly improved mechanical properties of Al-DFs composites. When DFs increased to 3 wt%, the fractography were transformed from dimple rupture of ductile failure into brittle-dominant fracture mode. Meanwhile, aluminum composites with 3 wt% DFs illustrated optimum tensile strength (185.2 MPa), yield strength (117.6 MPa) with elongation (13.5%), which exhibited strength increase of 20.7% and 32.0% respectively, compared with that of pure aluminum.

Aluminum-matrix composites (AMCs) Mechanical properties Particle-reinforcement Physical properties

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China[52003111] ; Shenzhen Science and Technology Innovation Committee[KQJSCX20180322152424539]

Materials Science

Materials Science, Multidisciplinary

WOS:000665498700032

ELSEVIER SCI LTD

20212110403695

Aggregates ; Aluminum ; Aluminum compounds ; Extrusion ; Fracture mechanics ; Grain boundaries ; Microstructure ; Reinforcement ; Silica ; Sintering ; Tensile strength

Highway Engineering:406 ; Concrete Reinforcements:412.2 ; Aluminum:541.1 ; Mechanics:931.1 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Materials Science:951

MATERIALS SCIENCE

2-s2.0-85106269600

Scopus

1.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Shenzhen Jawkai Bioengineering R&D Center Co.,Ltd.,Shenzhen,518055,China
3.Department of Polymeric Materials and Engineering,School of Materials and Energy,Guangdong University of Technology,Guangzhou,510006,China

Lyu，Sha,Wang，Yanjing,Han，He,et al. Microstructure characterization and mechanical properties of Al-matrix composites reinforced by artificially-cultured diatom frustules[J]. Materials and Design,2021,206.

Lyu，Sha.,Wang，Yanjing.,Han，He.,Ding，Chao.,Li，Dandan.,...&Yu，Peng.(2021).Microstructure characterization and mechanical properties of Al-matrix composites reinforced by artificially-cultured diatom frustules.Materials and Design,206.

Lyu，Sha,et al."Microstructure characterization and mechanical properties of Al-matrix composites reinforced by artificially-cultured diatom frustules".Materials and Design 206(2021).