Study on crack-healing behavior of silicon nitride

氮化硅裂纹愈合行为研究

• 批准号: 10650075
• 负责人: ANDO Kotoji
• 金额: $ 2.3万
• 依托单位: Yokohama National University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10650075/
• 关键词: SiィイD23ィエD2NィイD24ィエD2; Crack-healing; Fatigue strength; SiC; YィイD22ィエD2SiィイD22ィエD2OィイD27ィエD2; SiOィイD22ィエD2; High temperature strength; Healing condition; 窒化ケイ素; き裂治癒; 化学成分; イットリア; クリープ強度; 治癒条件; 窒化珪素; き裂寸法; き裂治癒条件; き裂治癒物質; 強度回復

Effect of Chemical Compositions, Atmosphers, Healing Time and Temperature on Healable Crack Size, Fatigue Strength of Healed Zone and High Temperature Strength of Healed Zone have been studied systematically. The silicon nitride which has excellent crack-healing ability was developed by this research.The main conclutions are followings :(1) The silicon nitride which used Y2O3 and Al2O3 as a sintering. additive have excellent crack healing ability. Especially, SiC is very useful to improve healing ability. (2) Crack healing ability in vacuum, argon, nitrogen and air, the materials can heal a crack in only air. (3) The silicon nitride of Si3N4/Y2O3/SiC has the best healing ability and the material could heal the quite large crack at from 800℃ to 1400℃, and strength recovered completely. (4) The materials (Si3N4/SiC/Y2O3/Al2O3 and Si3N4/SiC/Y2O3) healed the crack completely and most specimens fracture at base metal. (5) High temperature strength of crack healed zone is very sensitive to chemical compositions. (6) The crack healed zone of the materials (Si3N4/SiC/Y2O3/Al2O3) has enough strength up to 1000℃. (7) The crack healed zone of the materials (Si3N4/SiC/Y2O3) has excellent strength up to 1400℃

系统地研究了化学成分、气氛、固化时间和温度对可愈合裂纹尺寸、愈合区疲劳强度和愈合区高温强度的影响。本研究开发出了具有良好裂纹愈合能力的氮化硅材料，主要结论如下：(1)以Y_2O_3和Al_2O_3为烧结材料的氮化硅材料。外加剂具有良好的裂纹愈合能力。尤其是碳化硅对提高愈合能力有很大的作用。(2)裂纹在真空、氩气、氮气和空气中的愈合能力，该材料只能在空气中修复裂纹。(3)Si_3N_4/Y_2O_3/SiC材料的愈合能力最强，在800~1400℃范围内可愈合较大的裂纹，强度完全恢复。(4)Si3N4/SiC/Y_2O_3/Al_2O_3和Si3N_4/SiC/Y_2O_3两种材料裂纹完全愈合，大部分试件在母材处断裂。(5)裂纹愈合区的高温强度对化学成分非常敏感。(6)材料(Si_3N_4/SiC/Y_2O_3/Al_2O_3)的裂纹愈合区具有足够的强度，可达1000℃。(7)材料(Si_3N_4/SiC/Y_2O_3)的裂纹愈合区具有高达1400℃的优良强度

项目成果

秋他4名: "窒化けい素セラミックスのき裂治ゆ挙動"圧力技術. 36. 82-89 (1998)

Aki 等人 4：“氮化硅陶瓷的裂纹愈合行为”压力技术 36. 82-89 (1998)

K. Ando et al.: "Crack healing behavior and high temperature strength of silicon nitride"Trans. J.S.M.E.. 65. 1132-1139 (1999)

K. Ando等：“氮化硅的裂纹愈合行为和高温强度”Trans。

K.Ando 他3名: "Fatigue strength of Crack-healed Si_3N_4/SiC Composite Ceramics"Fatigue Fract. Engng. Mater Struct.. 22. 897-903 (1999)

K.Ando 等 3 人：“裂纹愈合的 Si_3N_4/SiC 复合陶瓷的疲劳强度”Fatigue Mater Struct.. 22. 897-903 (1999)

K. Ando et al: "Study on crack healing behavior of Si_7N_4IS*C compogite ceramics"Fatigue Fract. Engng.Mater.Struct.. 21. 119-122 (1998)

K. Ando等：“Si_7N_4IS*C复合陶瓷裂纹愈合行为的研究”疲劳断裂。

K.Ando 他4名: "A preliminary study on crack healing behaviour of Si_3N_4/SiC composite ceramics"Fatigue Fracture Engng. Mater. Struct.. 21. 119-122 (1998)

K.Ando等4人：“Si_3N_4/SiC复合陶瓷裂纹愈合行为的初步研究”《疲劳断裂结构》. 21. 119-122 (1998)