Development of High Temperature Thermal Shock Fracture Toughness Measuring Apparatus and Its Application

高温热震断裂韧性测量仪的研制及其应用

• 批准号: 62880023
• 负责人: SATO Sennosuke
• 金额: $ 2.69万
• 依托单位: Ibaraki University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research
• 财政年份: 1987
• 资助国家: 日本
• 起止时间: 1987 至 1989
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-62880023/
• 关键词: Thermal shock fracture; Fracture toughness; Fracture mechanics; Measuring apparatus; 熱衝撃破壊靱性; 応力拡大係数; 高温熱衝撃; 熱衝撃低抗; 炭化硅素; 高炉用コークス; 熱膨脹係数

Fracture mechanics properties of materials subjected to thermal stress or thermal shock are necessary to evaluate synthetically as a fore of parameter such as the thermal shock fracture toughness ; K_<IC>k/Ealpha, where K_<IC> is mode I fracture toughness value, k is thermal conductivity, E is Young's modulus and alpha is thermal expansivity. This research study is the development of a measuring apparatus of the thermal shock fracture toughness and its applications to practical uses.According to this development study, fracture mechanics properties by thermal stress or thermal shock have become possible to measure easily and reasonably en block the thermal shock fracture toughness parameter up to 2000ﾟC.The developed apparatus was successively applied to the determinations of graphites as core components for a high temperature gas cooled reactor(HTGR) and C/C-composites as plasma facing first wall components for fusion reactor devices(JT-60).Thermal stress fractures of materials occur widely in tribology problems such as mechanical seals for rotating machines and/or carbon brushes for electric motors. The developed apparatus was used for the quantitative evaluations of their critical capable parameters of mechanical seal and brush materials.

材料在热应力或热冲击作用下的断裂力学性能需要作为热震断裂韧度K&lt；IC&gt；k/Ea等参数的综合评价，其中K&lt；Ic&gt；是I型断裂韧度，k是导热系数，E是杨氏模数，α是热膨胀系数。本研究是热冲击断裂韧性测试装置的研制及其在实际应用中的应用。根据这一开发研究，利用热应力或热冲击的断裂力学性能已经可以方便而合理地整块测量高达2000ﾟC的热冲击断裂韧性参数。研制的装置先后用于高温气冷堆(HTGR)的核心部件石墨和聚变堆装置(JT-60)的C/C复合材料的等离子体面第一壁部件的测定。材料的热应力断裂广泛存在于旋转机械的机械密封和/或电机的碳刷等摩擦学问题中。用所研制的装置对其机械密封和电刷材料的关键性能参数进行了定量评估。

项目成果

S.Sato: "Degradiation of fracture mechanics properties of nuclear graphite due to burn-off" Nuclear Engineering Design. 118. 1-15 (1990)

S.Sato：“由于烧毁导致核石墨断裂力学性能的退化”核工程设计。

S.Sato: "Optimum arrangement of coke grain size for electrode graphite as determined by thermal shock tests" Carbon. 26. 853-866 (1988)

S.Sato：“通过热冲击试验确定的电极石墨焦炭粒度的最佳排列”碳。

Sato, S., et al.: "Optimum arrangement of coke grain size for electrode graphite as determined by thermal shock tests" Carbon. Vol.27. 853-866 (1989)

Sato, S. 等人：“通过热冲击试验确定的电极石墨焦炭粒度的最佳排列” 碳。

S.Sato: "Evaluation of blister-like fractures and critical PV-values of carbon mechanical seals by thermal shock tests" Carbon. 27. 803-814 (1989)

S.Sato：“通过热冲击试验评估碳机械密封件的泡状断裂和临界 PV 值”Carbon。

S.Sato: Biennial Conference on Carbon. 19. (1989)

S.Sato：两年一次的碳会议。