THE ADDITIONAL PROPERTIES IN DEFECT CONTROLLED CERAMICS

缺陷控制陶瓷的附加性能

• 批准号: 02680186
• 负责人: ATOBE Kozo
• 金额: $ 1.28万
• 依托单位: NARUTO UNIVERSITY OF EDUCATION
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02680186/
• 关键词: neutron 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

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.

氮化铝、氮化硼陶瓷具有高熔点、高导热性和极高的硬度，是聚变堆和高温环境下能量转换的主要候选材料之一。为了研究氮化物中缺陷的产生与力学性能变化的关系，用光学吸收和ESR方法研究了反应堆中子（KUR）在AlN和c-BN烧结体中产生的点缺陷及其热行为。1.在25 K下，用2.8 × 10^<15>- 5.3 × 10^-10^<16>n/cm ^2（快中子：E&gt;0.1 MeV）的中子辐照试样。快中子轰击和释放高能量的不透明反应^<10>B和^<14>N在氮化物中产生各种类型的缺陷。对应于ESR信号的缺陷被指定为电子俘获氮空位。2.中子辐照后的硬化也研究了这些氮化物使用的标识方法。特别是c-BN的硬度随中子剂量的增加而明显增加。

项目成果

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)

K.Atobe，M.Honda，N.Fukuoka，M.okada M.Nakakawa：“中子辐照 AIN 中的 F 型中心”Jpn.J.Appl.phys.29。

K.Atobe,M.Honda,N.Fukuda,M.Okada M.Nakagawa: "Point Defects in cubic-Boron Nitride after Neutron Irradiation" Jpn.J.Appl.phys. (1993)

K.Atobe，M.Honda，N.Fukuda，M.Okada M.Nakakawa：“中子辐照后立方氮化硼的点缺陷”Jpn.J.Appl.phys。

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)

K.Atobe、M.Honda、N.Fukuoka、M.Okada 和 M.Nakakawa：“中子辐照 AIN 中的 F 型中心”日本应用物理学杂志。

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)

M.Honda、K.Atobe、N.Fukuoka、M.Okada 和 M.Nakakawa：“中子辐照 AIN 中的电子顺磁中心”日本应用物理学杂志。

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)

K.Atobe，M.Honda，N.Fukuoka，M.Okada，M.Nakakawa：“中子辐照 AlN 中的 F 型中心”Jpn.J.Appl.Phys.29。