Interfacial microstructure evolution in aluminium matrix composites reinforced with unoxidized and oxidized SiC particles

Zhongliang Shi, Shijiro Ochiai, Mingyuan Gu, Masaki Hojo, Jae-chul Lee

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Interfacial microstructure evolution of Al matrix composites with non-oxidized and oxidized SiC particles as reinforcement was investigated using x-ray diffraction, field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). Hexagonal platelet-shaped Al4C3 and Si are the two major interfacial reaction products in the non-oxidized SiC-particle-reinforced Al matrix composites (SiCp/Al). In addition, the eutectic θ-CuAl2 and Si phases precipitate at the SiCp/matrix interface during the last solidification stage. Observation of the interfacial reaction between the oxidized SiC particles and Al alloy containing Mg shows that the SiO2 layer has good bonding with both SiC and Al matrix and that nanoparticles of MgO have formed initially. The MgO particles will change into octahedral MgAl2O4 crystals when there is a low Mg content in the matrix (≤2 wt.%) and will remain as MgO when there is a high Mg content (≥4 wt.%).

Original languageEnglish
Pages (from-to)375-384
Number of pages10
JournalSurface and Interface Analysis
Volume31
Issue number5
DOIs
Publication statusPublished - 2001 May 1
Externally publishedYes

Fingerprint

Surface chemistry
Aluminum
aluminum
microstructure
Microstructure
composite materials
Composite materials
matrices
Platelets
Reaction products
Field emission
Eutectics
Solidification
Precipitates
Reinforcement
Diffraction
Nanoparticles
Transmission electron microscopy
X rays
Crystals

Keywords

  • Electron microscopy
  • Interface
  • SEM
  • TEM

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

Cite this

Interfacial microstructure evolution in aluminium matrix composites reinforced with unoxidized and oxidized SiC particles. / Shi, Zhongliang; Ochiai, Shijiro; Gu, Mingyuan; Hojo, Masaki; Lee, Jae-chul.

In: Surface and Interface Analysis, Vol. 31, No. 5, 01.05.2001, p. 375-384.

Research output: Contribution to journalArticle

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abstract = "Interfacial microstructure evolution of Al matrix composites with non-oxidized and oxidized SiC particles as reinforcement was investigated using x-ray diffraction, field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). Hexagonal platelet-shaped Al4C3 and Si are the two major interfacial reaction products in the non-oxidized SiC-particle-reinforced Al matrix composites (SiCp/Al). In addition, the eutectic θ-CuAl2 and Si phases precipitate at the SiCp/matrix interface during the last solidification stage. Observation of the interfacial reaction between the oxidized SiC particles and Al alloy containing Mg shows that the SiO2 layer has good bonding with both SiC and Al matrix and that nanoparticles of MgO have formed initially. The MgO particles will change into octahedral MgAl2O4 crystals when there is a low Mg content in the matrix (≤2 wt.{\%}) and will remain as MgO when there is a high Mg content (≥4 wt.{\%}).",
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AU - Hojo, Masaki

AU - Lee, Jae-chul

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N2 - Interfacial microstructure evolution of Al matrix composites with non-oxidized and oxidized SiC particles as reinforcement was investigated using x-ray diffraction, field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). Hexagonal platelet-shaped Al4C3 and Si are the two major interfacial reaction products in the non-oxidized SiC-particle-reinforced Al matrix composites (SiCp/Al). In addition, the eutectic θ-CuAl2 and Si phases precipitate at the SiCp/matrix interface during the last solidification stage. Observation of the interfacial reaction between the oxidized SiC particles and Al alloy containing Mg shows that the SiO2 layer has good bonding with both SiC and Al matrix and that nanoparticles of MgO have formed initially. The MgO particles will change into octahedral MgAl2O4 crystals when there is a low Mg content in the matrix (≤2 wt.%) and will remain as MgO when there is a high Mg content (≥4 wt.%).

AB - Interfacial microstructure evolution of Al matrix composites with non-oxidized and oxidized SiC particles as reinforcement was investigated using x-ray diffraction, field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). Hexagonal platelet-shaped Al4C3 and Si are the two major interfacial reaction products in the non-oxidized SiC-particle-reinforced Al matrix composites (SiCp/Al). In addition, the eutectic θ-CuAl2 and Si phases precipitate at the SiCp/matrix interface during the last solidification stage. Observation of the interfacial reaction between the oxidized SiC particles and Al alloy containing Mg shows that the SiO2 layer has good bonding with both SiC and Al matrix and that nanoparticles of MgO have formed initially. The MgO particles will change into octahedral MgAl2O4 crystals when there is a low Mg content in the matrix (≤2 wt.%) and will remain as MgO when there is a high Mg content (≥4 wt.%).

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