Study on Improvement of Fatigue Strength and Thermal Fatigue Strength of High Density Low Pressure Plasma Sprayed Material.

高密度低压等离子喷涂材料疲劳强度和热疲劳强度提高研究。

• 批准号: 13650089
• 负责人: NISHIKAWA Izuru
• 金额: $ 2.24万
• 依托单位: Osaka university
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650089/
• 关键词: Ceramics spray; Laser speckle; Strain measurement; High temperature fatigue; Delamination; Internal crack; Crack growth; Low pressure spray; セラミック溶射; レーザースペックル; 剥離き裂

Fatigue tests were conducted at both 893K and room temperature for a zirconia-sprayed type 304 stainless steel. Surface strain was monitored by using a laser speckle strain gauge during the fatigue test to examine the fatigue processes such as cracking and, delamination of subsurface layer. Fatigue life of an Atomospheric Plasma Spraying(APS) zirconia-coated specimen was similar to that of a blasted substrate. A cracking occurred in the ceramics layer at the early stage of fatigue failure and the crack penetration into the substrate. In case of a Low Pressure Plasma Spraying (LPPS) zirconia-coated specimen, the fatigue life was longer than that of a blasted substrate. The bond coating layer made by LPPS was found to restrain a crack from initiating in the substrate.

在893K和室温下，针对氧化氢型304不锈钢进行了疲劳测试。通过在疲劳测试期间使用激光斑点应变量表来监测表面应变，以检查疲劳过程，例如开裂和地下层的分层。原子圈等离子体喷涂（APS）锆涂层标本的疲劳寿命与爆破的底物相似。在疲劳破坏的早期阶段，陶瓷层发生了破裂，裂纹渗透到基板中。如果低压等离子体喷涂（LPPS）氧化锆涂层的标本，疲劳寿命比爆破的底物的寿命更长。发现LPP制造的键涂层限制了裂纹在基板中的启动。

项目成果

Koichi MASUKAWA, Izuru NISHIKAWA, Keiji OGURA,: "Effect of Negative Stress Ratio on Increase in Crack Growth Resistance of Silicon Nitride Ceramics at High Temperature"Proceedings of JSME. No.034-1. (2003)

Koichi MASUKAWA、Izuru NISHIKAWA、Keiji OGURA，“负应力比对提高氮化硅陶瓷高温裂纹扩展阻力的影响”JSME 论文集。

Izuru NISHIKAWA, Keiji OGURA, Shinya KUNIMATSU: "Crack Opening Behaviour of Moving Crack and Stationary Crack of Silicon Nitride Ceramics at High Temperature."Proceedings of the 26th Symposiu on Fatigue. (2002)

Izuru NISHIKAWA、Keiji OGURA、Shinya KUNIMATSU：“氮化硅陶瓷高温下移动裂纹和静止裂纹的裂纹扩展行为”。第 26 届疲劳研讨会论文集。

脇裕之, 小倉敬二, 西川出: "皮膜ひずみモニタリングによる遮熱コーティング鋼の高温疲労はく離検出"日本材料学会第40回高温強度シンポジウム前刷集. 75-79 (2002)

Hiroyuki Waki、Keiji Ogura、Izuru Nishikawa：“通过监测薄膜应变检测热障涂层钢的高温疲劳剥落”第 40 届材料科学学会高温强度研讨会论文集，日本 75-79 (2002)。

Hiroyuki WAKI, Keiji OGURA, Izuru NISHIKAWA, Yoshihiko KASHIHARA: "Residual Stress Measurement of Plasma-Sprayed Coatings"Transaction of JSME. 68-673. 1182-1188 (2002)

Hiroyuki WAKI、Keiji OGURA、Izuru NISHIKAWA、Yoshihiko KASHIHARA：“等离子喷涂涂层的残余应力测量”JSME 交易。

Hiroyuki WAKI, Keiji OGURA, Izuru NISHIKAWA: "Effect of Delamination Strength of Bond Coatings on High Temperature Fatigue Strength of Thermal Barrier Coating Material"Proceedings of JSME. No.02-1. 221-222 (2002)

Hiroyuki WAKI、Keiji OGURA、Izuru NISHIKAWA：“粘结涂层分层强度对热障涂层材料高温疲劳强度的影响”JSME 论文集。