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THE ADDITIONAL PROPERTIES IN DEFECT CONTROLLED CERAMICS

Research Project

Project/Area Number 02680186
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Nuclear engineering
Research InstitutionNARUTO UNIVERSITY OF EDUCATION

Principal Investigator

ATOBE Kozo  PROFESSOR, 学校教育学部, 教授 (90027467)

Co-Investigator(Kenkyū-buntansha) HONDA Makoto  RESEARCH ASSOCIATE NARUTO UNIVERSITY OF EDUCATION,COLLEGE OF EDUCATION, 学校教育学部, 助手 (50199577)
MATSUKAWA Tokuo  ASSOCIATE PROF., 学校教育学部, 助教授 (30101281)
FUKUOKA Noboru  PROFESSOR, 学校教育学部, 教授 (10029689)
Project Period (FY) 1990 – 1992
Project Status Completed (Fiscal Year 1992)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1992: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1991: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1990: ¥1,500,000 (Direct Cost: ¥1,500,000)
Keywordsneutron irradiation / irradiation induced defect / unclear fission damage / atomic vacancy / defect concentration / hardness / nitrides / ceramics / F-中心 / 硬度評価 / 格子欠陥 / 原子炉照射 / Fー中心 / 機械的評価
Research Abstract

The ceramics(AIN,BN)possess a various interesting characterestics, such as,high melting point,very high thermal conductivity and extreme hardness.It is one of the primary candidate materials for use in fusion reactor and conversion of energy at elevated temperature environments. It is the purpose of this experiment to investigate the relation between the defect production and the change of mechanical properties in the nitrides.The production point defects induced by reactor(KUR) neutron and the thermal behavior of the defect in sintered AIN and c-BN were studied using optical a sorption and ESR methods.Further,the enhancement of hardness in irradiated nitrides were also estimated.
1.The specimens were irradiated by neutrons in the range of 2.8 x 10^<15> - 5.3 x 10^<16>n/cm^2(fast neutron:E>0.1 MeV) at 25 K.Fast neutron bombardment and the unclear reactions ^<10>B and ^<14>N with released high energy produce the various type of defects in the nitrides. The defect corresponding the ESR signal in assigned to be an electron trapped nitrogen vacancy. 2.Hardening after neutron irradiation was also studied in these nitrides using the identation method. In especially,hardness in c-BN increased clearly with neutron dose.

Report

(4 results)
  • 1992 Annual Research Report   Final Research Report Summary
  • 1991 Annual Research Report
  • 1990 Annual Research Report
  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] K.Atobe,M.Honda,N.Fukuoka,M.Okada,M.Nakagawa: "F-type Centers in Neutron-Irradiated AlN" Jpn.J.Appl.Phys.29. 150-152 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] M.Honda,K.Atobe,N.Fukuoka,M.Okada,M.Nakagawa: "Electron Paramagnetic Center in Neutron-Irradiated AlN" Jpn.J.Appl.Phys.29. L652-654 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] K.Atobe,M.Honda,N.Fukuoka,M.Okada,M.Nakagawa: "Point Defects in Cubic-Boron Nitride after Neutron Irradiation" Jpn.J.Appl.Phys.(1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] K.Atobe,M.Honda,N.Fukuoka,M.Okada and M.Nakagawa: "F-type Centers in Neutron-Irradiated AIN" Japanese Journal of Applied Physics. 29. 150-152 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] M.Honda,K.Atobe,N.Fukuoka,M.Okada and M.Nakagawa: "Electron Paramagnetic Center in Neutron-Irradiated AIN" Japanese Journal of Applied Physics. 29. L652-654 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] K.Atobe,H.Honda,M.Ide,H.Yamagi,T.Matsukawa,N.Fukuoka,M.Okada and M.Nakagawa: "Point Defects in cubic-Boron Nitride after Neutron Irradiation" Japanese Journal of Applied Physics. (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] K.Atobe,M.Honda,N.Fukuoka,M.okada M.Nakagawa: "F-type centers in Neutron-Irradiated AIN" Jpn.J.Appl.phys.29. 150-152 (1990)

    • Related Report
      1992 Annual Research Report
  • [Publications] M.Honda,K.Atobe,N.Fukuoka,M.okada M.Nakagawa: "Electron Paramagnetic Center in Neutron-Irradiated AIN" Jpn.J.Appl.phys. 29. 652-654 (1990)

    • Related Report
      1992 Annual Research Report
  • [Publications] K.Atobe,M.Honda,N.Fukuda,M.Okada M.Nakagawa: "Point Defects in cubic-Boron Nitride after Neutron Irradiation" Jpn.J.Appl.phys. (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] 跡部 紘三,他: "中性子照射したAINのF-中心" 日本応用物理学会欧文誌J.J.A.P.29. 150-152 (1990)

    • Related Report
      1991 Annual Research Report
  • [Publications] 本田 亮,他: "中性子照射したAIN中の常磁性中心" 日本応用物理学会欧文誌J.J.A.P.29. L652-654 (1990)

    • Related Report
      1991 Annual Research Report

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Published: 1990-04-01   Modified: 2016-04-21  

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