Fracture toughness of ceramics at elevated temperature and metallurgical factors for controlling the toughness

陶瓷高温断裂韧性及控制韧性的冶金因素

基本信息

  • 批准号:
    60550048
  • 负责人:
  • 金额:
    $ 1.22万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
  • 财政年份:
    1985
  • 资助国家:
    日本
  • 起止时间:
    1985 至 1986
  • 项目状态:
    已结题

项目摘要

Three-point bend tests of four kinds of silicon nitrides with the same chemical composition, which were produced by different sintering methods and under different sintering conditions, were carried out at elevated temperature. Effects of sintering method and density on fracture strength were investigated. Effects of sintering method and density on fracture toughness evaluated by using the indentation method and fractographic method were also investigated. A new method for evaluating fracture toughness of ceramics, where fatigue precrack was introduced at elevated temperature, was developed. Main results are summarized as follows.(1) Fracture strengths were decreased with reducing density. The Weibull modulus m seemed to depend upon the sintering mehtod. (2) Fracture toughness values and also the Weibull modulus m were decreased with reducing density. (3) Fatigue precrack was successfully introduced into a notched bend specimen of silicon nitride at 1200゜C. The fatigue precrack specimen satisfied the conditions for fracture toughness specimen required by the standard of ASTM E399. (4) Fracture toughness values obtained by fatigue precracked specimens were almost equal to those obtained by using the indentation method. Fracture toughness malues up to the temperature of 1000゜C were almost the same as those at room temperature.
对四种化学成分相同、采用不同烧结方法和烧结条件制备的氮化硅陶瓷进行了高温三点弯曲试验。研究了烧结方法和密度对断裂强度的影响。研究了烧结方法和烧结密度对压痕法和断口形貌法测定断裂韧性的影响。提出了一种在高温下引入疲劳预裂纹的陶瓷材料断裂韧性的新方法。主要结果总结如下。(1)断裂强度随密度的降低而降低。Weibull模量m似乎取决于烧结方法。(2)断裂韧性值和威布尔模量m随密度的降低而降低。(3)在1200 ℃的氮化硅缺口弯曲试样中成功地引入了疲劳预裂纹。疲劳预裂纹试样满足ASTM E399标准对断裂韧性试样的要求。(4)疲劳预裂纹试样的断裂韧性值几乎等于那些通过使用压痕法得到的。在1000 ℃以下的断裂韧性值与室温下的断裂韧性值基本相同。

项目成果

期刊论文数量(8)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Y. Mutoh, K. Tanaka, and T. Niwa: "Fracture Toughness Test of Fatigue Precracked Silicon Nitride" Preprint of 35th Annual Meeting of the Society of Materials Science,Japan. 35. 319-321 (1986)
Y. Mutoh、K. Tanaka 和 T. Niwa:“疲劳预裂氮化硅的断裂韧性测试”日本材料学会第 35 届年会预印本。
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武藤睦治,田中紘一,丹羽敏男: 第29回材料研究連合講演会前刷集. 121-122 (1985)
Mutoji Muto、Koichi Tanaka、Toshio Niwa:第 29 届材料研究联盟讲座预印本集 121-122 (1985)。
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    0
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武藤睦治,田中紘一,丹羽敏男: 日本機械学会論文集.
Mutsuji Muto、Koichi Tanaka、Toshio Niwa:日本机械工程师学会会议录。
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武藤睦治,田中紘一,丹羽敏男: 材料学会第35期学術講演会前刷. 319-321 (1986)
Muto Muto、Koichi Tanaka、Toshio Niwa:日本材料学会第 35 届学术会议预印本 319-321(1986)。
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    0
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Y. Mutoh, K. Tanaka, and T. Niwa: "Effects of Sintering Method and Density on Mechanical Properties and Fracture Toughness of Silicon Nitride at Elevated Temperature" Journ. of JSME.
Y. Mutoh、K. Tanaka 和 T. Niwa:“烧结方法和密度对高温下氮化硅机械性能和断裂韧性的影响”杂志。
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MUTOH Yoshiharu其他文献

Effects of Adhesives on Evaluation Method of Interfacial Strength of Plasma‐Sprayed HAp Coating
粘合剂对等离子喷涂HAp涂层界面强度评价方法的影响
  • DOI:
  • 发表时间:
    2017
  • 期刊:
  • 影响因子:
    0
  • 作者:
    OTSUKA Yuichi,HIRAKU Yoshihisa;HAKOZAKI Yuki, MIYASHITA Yukio;MUTOH Yoshiharu
  • 通讯作者:
    MUTOH Yoshiharu

MUTOH Yoshiharu的其他文献

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{{ truncateString('MUTOH Yoshiharu', 18)}}的其他基金

Development of a Method for Fretting Fatigue Life Prediction with Taking Account of Wear based on in-situ Observation of Fretting Wear and Fatigue Processes
基于微动磨损和疲劳过程的现场观察,开发考虑磨损的微动疲劳寿命预测方法
  • 批准号:
    21360052
  • 财政年份:
    2009
  • 资助金额:
    $ 1.22万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Laser Cutting of Functional Materials by Twin Laser Beam and Thermal Stress Analysis
双激光束激光切割功能材料和热应力分析
  • 批准号:
    16360050
  • 财政年份:
    2004
  • 资助金额:
    $ 1.22万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Development of thermo conductive analysis simulation in order to aid laser welding of dissimilar metals
开发热传导分析模拟以辅助异种金属的激光焊接
  • 批准号:
    13650774
  • 财政年份:
    2001
  • 资助金额:
    $ 1.22万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Fatigue crack growth behavior of interface crack in thermal barrier coating
热障涂层界面裂纹的疲劳裂纹扩展行为
  • 批准号:
    10650077
  • 财政年份:
    1998
  • 资助金额:
    $ 1.22万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Development of a System for Analysing Damage Mechanism of Coatings in Scratch Test
涂层划痕试验损伤机理分析系统的开发
  • 批准号:
    07555619
  • 财政年份:
    1995
  • 资助金额:
    $ 1.22万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Fatigue Strength of Functionally Graded Thermal Barrier Ceramic Coatings Subjected to Thermal Cycling under Gradient Temperature
梯度温度下热循环功能梯度热障陶瓷涂层的疲劳强度
  • 批准号:
    06452147
  • 财政年份:
    1994
  • 资助金额:
    $ 1.22万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
High Temperature Fretting Fatigue Properties of Silicon Nitride
氮化硅的高温微动疲劳性能
  • 批准号:
    04650062
  • 财政年份:
    1992
  • 资助金额:
    $ 1.22万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
High Temperature Fatigue Crack Growth in Silicon Nitride and Role of SCC.
氮化硅中的高温疲劳裂纹扩展和 SCC 的作用。
  • 批准号:
    02650054
  • 财政年份:
    1990
  • 资助金额:
    $ 1.22万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
High Temperature Fretting Fatigue of Turbine Steels Under Variable Loading Simulating Practical Operation
模拟实际运行变载荷下汽轮机钢的高温微动疲劳
  • 批准号:
    62550053
  • 财政年份:
    1987
  • 资助金额:
    $ 1.22万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)

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合作研究:确定腔隙-小管重塑对骨折韧性的影响
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开发用于高性能高铬铸铁 (HCCI) 的新型碳化物,具有断裂韧性和硬度的优化组合
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