• 제목/요약/키워드: spark-plasma-sintering

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수열합성 법에 의한 $BaTiO_3$ 분말제조 및 방전 플라즈마 소결 (Characterization of Hydrothermally Synthesized $BaTiO_3$ Powder and Spark Plasma Sintering(SPS))

  • 이정수;이완재
    • 한국분말재료학회지
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    • 제8권1호
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    • pp.35-41
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    • 2001

  • $BaTiO_3$ fine powder was synthesized by hydrothermal process from the mixture of titania-hydroxide($TiO_2{\cdot}xH_2O$) and barium hexa-hydroxide ($Ba(OH)_2{\cdot}8H_2O$) as starting materials. Fine powder(< 100 nm) was made under the reaction conditions of 18$0^{\circ}C$,10 atm, 1.5 hr in autoclave and showed cubic structure. The powders were sintered by a spark plasma sintering technique from 1050~115$0^{\circ}C$ for 5 min. The grains of sample sintered at 110$0^{\circ}C$ were about 0.9${\mu}m$ in average size and showed the mixture of cubic and tetragonal structures.

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Fabrication Process and Properties of Carbon Nanotube/Cu Nanocomposites

  • Cha, Seung-I.;Kim, Kyung-T.;Mo, Chan-B.;Hong, Soon-H.
    • 한국분말야금학회:학술대회논문집
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    • 한국분말야금학회 2006년도 Extended Abstracts of 2006 POWDER METALLURGY World Congress Part 1
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    • pp.366-367
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    • 2006

  • Carbon nanotubes (CNTs) have attracted remarkable attention as reinforcement for composites owing to their outstanding mechanical properties. The CNT/Cu nanocomposite is fabricated by a novel fabrication process named molecular level process. The novel process for fabricating CNT/Cu composite powders involves suspending CNTs in a solvent by surface functionalization, mixing Cu ions with CNT suspension, drying, calcination and reduction. The molecular level process produces CNT/Cu composite powders whereby the CNTs are homogeneously implanted within Cu powders. The mechanical properties of CNT/Cu nanocomposite, consolidated by spark plasma sintering of CNT/Cu composite powders, shows about 3 times higher strength and 2 times higher Young's modulus than those of Cu matrix.

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