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New process for preparation of low density, porous shape of silicon carbide by chemical vapor infiltration

Research Project

Project/Area Number 08650997
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 無機工業化学
Research InstitutionAichi Institute of Technology

Principal Investigator

SUGIYAMA Kohzo  Aichi Institute of technology, Faculty of Engineering, Professor, 工学部, 教授 (50023023)

Co-Investigator(Kenkyū-buntansha) OHZAWA Yoshimi  Aichi Institute of technology, Faculty of Engineering, Assistant Professor, 工学部, 講師 (80278225)
Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1997: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1996: ¥1,400,000 (Direct Cost: ¥1,400,000)
Keywordschemical vapor infiltration of SiC / porous silicon carbide / SiC filter
Research Abstract

Carbonized cotton cloth, cotton wool, and recycle paper were used as substrates, and silicon carbide was infiltrated from a gas mixture of SiCl_4, CH_4, and H_2 by pressure pulsed chemical vapor onfiltration (PCVI) in order to obtain a highly porous shape of silicon carbide for use to refractory filter or catalyst carrier. Among the cotton cloths, flunnel was the best for above purpose, the carbonized flunnel had a porosity of 95%. After 5000 pulses of PCVI,the porosity decreased to about 90%. The pores distributed below 70mum, and the pressure drop of the sample of 20 mm long against the air flow rate of 1.1 m/s was 8 kPa. The weight decrease of the PCVIed sample during air oxidation at 1000゚C saturated below 5 hours, and the flexural strength of the samples PCVIed with 5000 and 15000 pulses were 1 and 10 MPa, respectively. Cotton wool was immersed in water, rolled tightly, and carbonized. The porosities before and after 20000 pulses of PCVI at 1100゚C were 90% and 82%, respectively. The average pore diameters after 10000 and 20000 pulses of PCVI were 10 and 6 mum, respectively. Pressure drop of the sample of 10 mm thick and after 10000 pulses to air flow of 1.1 m/s was 15 kPa, and flexural strength after 20000 pulses was 25 MPa. These properties are considered to be suitable for use to refractory filters. Filter paper and recycle paper were scattered into pieces in boiled water, pressed to column, and carbonized. Average pore size was as small as 6 mum, and that after 10000 pulses 5 mum, because the monofilament of the papers were thin compared with that of cotton. Therefore, pressure drop of the sample of 5 mm thick after 10000 pulses under an air flow rate of 0.8 m/s was as high as 8 kPa. A substrate made from carbonizing of corrigated cardboard was also PCVIed, and thin wall (0.02 mm) SiC honeycomb was obtained with 10000 to 20000 pulses of CVI.

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (19 results)

All Other

All Publications (19 results)

  • [Publications] Kohzo Sugiyama: "Pressure-pulsed chemical vapour infiltration of TiN to SiC particulate preforms" Journal of Materials science. 31. 2945-2949 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Kohzo Sugiyama: "Pressure-pulsed chemical vapour infiltration of SiC to porous carbon from a gas system SiCl_4-CH_4-H_2" Journal of Materials Science. 31. 3661-3665 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yoshimi Ohzawa: "Pressure-pulsed chemical vapour infiltration of pyrolytic carbon to porous carbon or two-dimensional-carbon/SiC particulate preforms from a gas system CH_4-H_2-N_2" Materials Science & Engineering B. B45. 114-121 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yoshimi Ohzawa: "Pressure-pulsed chemical vapour infiltration of SiC into two-dimensinal-Tyranno/SiC particulate preforms from SiCl_4-CH_4-N_2" Journal of Materials Science. 32. 4289-4294 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yoshimi Ohzawa: "Pressure-pulsed chemical vapour infiltration of pyrolytic carbon into porous carbon or two-dimensional-carbon/SiC particulate preforms from C_6H_6-H_2-N_2" Journal of Materials Science. 33. 435-439 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yoshimi Ohzawa: "Preparation of high-temperature filter by partial densification of carbonized cotton-wool with SiC" Materials Science & Engineering A. (in press).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Kohzo Sugiyama: "Pressure-pulsed chemical vapor infiltration of TiN to SiC particulate preforms" Journal of Materials Science. 31. 2945-2949 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Kohzo Sugiyama: "Pressure-pulsed chemical vapor infiltration of SiC to porous carbon from a gas system SiCl_4-CH_4-H_2" Journal of Materials Science. 31. 3661-3665 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yoshimi Ohzawa: "Pressure-pulsed chemical vapor infiltration of pyrolytic carbon to porous carbon or two-dimensional-carbon/SiC particulate preforms from a gas system SCH_4-H_2-N_2" Materials Science and Engineering B. B45. 114-121 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yoshimi Ohzawa: "Pressure-pulsed chemical vapor infiltration of SiC into two-dimensional Tyranno/SiC particulate preforms from SiCl_4-CH_4-H_2" Journal of Materials Science. 32. 4289-4294 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yoshimi Ohzawa: "Pressure-pulsed chemical vapor infiltration of pyrolytic carbon into porous carbon or two-dimensional-carbon/SiC particulate preforms from C_6H_6-H_2-N_2" Journal of Materials Science. 33. 435-439 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yoshimi Ohzawa: "Preparation of high-temperature filter by partial densification of carbonized cotton-wool with SiC" Materials Science and Engineering A. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yoshimi Ohzawa: "Pressure-pulsed chemical vapour infiltration of pyrolytic carbon to porous carbon or two-dimensional-carbon/SiC particulate preforms from a gas system CH_4-H_2" Materials Science & Engineering B. B45 1-3. 114-121 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Yoshimi Ohzawa: "Pressure-pulsed chemical vapour infiltration of SiC into two-dimensional-Tyranno/SiC particulate preforms from SiCl_4-CH_4-H_2" Journal of Materials Science. 32 16. 4289-4294 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Yoshimi Ohzawa: "Preparation of porous SiC shape by pressure-pulsed chemical vapour infiltration into carbonized cotton-fibre preforms" Journal of Materials Science. (in press).

    • Related Report
      1997 Annual Research Report
  • [Publications] Yoshimi Ohzawa: "Preparation of high temperature filter by partial densification of carbonized cotton wool with SiC" Materials Science & Engineering A. (in press).

    • Related Report
      1997 Annual Research Report
  • [Publications] Yoshimi Ohzawa: "Pressure-pulsed chemical vapour infiltration of pyrolytic carbon into porous carbon or two-dimensional-carbon/SiC particulate preforms from C_6H_6-H_2-N_2" Journal of Materials Science. 33 2. 435-439 (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] Kohzo Sugiyama: "Pressure-pulsed chemical vapour infiltration of SiC to porous carbon from a gas system SiCl^4-CH^4-H^2" Journal of Materials Seience. 31,14. 3661-3665 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Kohzo Sugiyama: "Pressure-pulsed chemical vapour infiltration of TiN to SiC particulate preforms" Journal of Materials Seience. 31,11. 2945-2949 (1996)

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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