Microstructure and mechanical properties of Cu-base amorphous alloy matrix composites consolidated by spark plasma sintering

Chang Kyu Kim, Sunghak Lee, Seung Yong Shin, Do Hyang Kim

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Cu-base amorphous alloy matrix composites were consolidated in a spark plasma sintering (SPS) facility. Amorphous powders were mixed with 10-40 vol.% of pure Cu powders, and were consolidated at 460 °C for 30 s under 300 and 700 MPa. The consolidated composites containing Cu particles homogeneously distributed in the amorphous matrix showed a considerable amount of plastic strain because of the presence of ductile Cu particles, although their compressive strength was lower than that of the monolithic amorphous alloys. The compressive strength and plastic strain of the composites consolidated under 700 MPa showed 10-20% and 100% increases, respectively, over those of the composites consolidated under 300 MPa. The increase in consolidation pressure could play a role in sufficiently bonding prior amorphous powders, in preventing micropores, and in suppressing the formation of nanocrystalline or crystalline phases. These findings suggest that composites consolidated by the SPS present new possibilities of application as structural materials offering excellent mechanical properties and satisfying large-size requirements.

Original languageEnglish
Pages (from-to)924-928
Number of pages5
JournalMaterials Science and Engineering A
Volume448-451
DOIs
Publication statusPublished - 2007 Mar 25

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Spark plasma sintering
Amorphous alloys
sparks
sintering
mechanical properties
Mechanical properties
microstructure
Microstructure
composite materials
Powders
Composite materials
matrices
compressive strength
Compressive strength
Plastic deformation
plastics
consolidation
Consolidation
Crystalline materials
requirements

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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abstract = "Cu-base amorphous alloy matrix composites were consolidated in a spark plasma sintering (SPS) facility. Amorphous powders were mixed with 10-40 vol.{\%} of pure Cu powders, and were consolidated at 460 °C for 30 s under 300 and 700 MPa. The consolidated composites containing Cu particles homogeneously distributed in the amorphous matrix showed a considerable amount of plastic strain because of the presence of ductile Cu particles, although their compressive strength was lower than that of the monolithic amorphous alloys. The compressive strength and plastic strain of the composites consolidated under 700 MPa showed 10-20{\%} and 100{\%} increases, respectively, over those of the composites consolidated under 300 MPa. The increase in consolidation pressure could play a role in sufficiently bonding prior amorphous powders, in preventing micropores, and in suppressing the formation of nanocrystalline or crystalline phases. These findings suggest that composites consolidated by the SPS present new possibilities of application as structural materials offering excellent mechanical properties and satisfying large-size requirements.",
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Microstructure and mechanical properties of Cu-base amorphous alloy matrix composites consolidated by spark plasma sintering. / Kim, Chang Kyu; Lee, Sunghak; Shin, Seung Yong; Kim, Do Hyang.

In: Materials Science and Engineering A, Vol. 448-451, 25.03.2007, p. 924-928.

Research output: Contribution to journalArticle

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AB - Cu-base amorphous alloy matrix composites were consolidated in a spark plasma sintering (SPS) facility. Amorphous powders were mixed with 10-40 vol.% of pure Cu powders, and were consolidated at 460 °C for 30 s under 300 and 700 MPa. The consolidated composites containing Cu particles homogeneously distributed in the amorphous matrix showed a considerable amount of plastic strain because of the presence of ductile Cu particles, although their compressive strength was lower than that of the monolithic amorphous alloys. The compressive strength and plastic strain of the composites consolidated under 700 MPa showed 10-20% and 100% increases, respectively, over those of the composites consolidated under 300 MPa. The increase in consolidation pressure could play a role in sufficiently bonding prior amorphous powders, in preventing micropores, and in suppressing the formation of nanocrystalline or crystalline phases. These findings suggest that composites consolidated by the SPS present new possibilities of application as structural materials offering excellent mechanical properties and satisfying large-size requirements.

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