New Technology for Increasing Through-Life Reliability of Ceramics Components Using Self-Crack-Healing Ability

New Technology for Increasing Through-Life Reliability of Ceramics Components Using Self-Crack-Healing Ability
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利用自裂纹修复能力提高陶瓷元件的终生可靠性的新技术

DOI:
10.1155/2013/937312
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发表时间:
2013
期刊:
Journal of Powder Technology
影响因子:
--
通讯作者:
K. Iwanaka
K. Iwanaka
中科院分区:
--
文献类型:
--
作者:
K. Ando;Koji Takahashi;W. Nakao;T. Osada;K. Iwanaka

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结构陶瓷在高温强度和临界耐热温度方面优于金属材料。然而,与金属材料相比,陶瓷具有较低的断裂韧性,因此对孔隙和裂纹等缺陷更敏感。这种短时间大大降低了部件的可靠性。为了克服这一缺陷,本研究重点研究了具有自裂纹修复能力的结构陶瓷。使用具有自裂纹修复能力的材料有几个优点。(1)经过高效的机器操作,材料能够自愈加工产生的裂纹。(2)材料在使用过程中产生的裂纹能够自愈,并在愈合温度下完全恢复强度。然而,组织现有知识以提高陶瓷部件全寿命可靠性的方法尚未得到广泛研究。作者提出了一个新的概念和相应的流程图。这一新概念为提高具有优异自裂纹修复能力的陶瓷部件的全寿命可靠性提供了一种很有前途的技术。
Structural ceramics are superior to metallic materials in terms of their high-temperature strengths and critical heat proof temperatures. However, compared to metallic materials, ceramics exhibit lower fracture toughness, so they are more sensitive to flaws such as pores and cracks. The shortness considerably decreases the component reliability. To overcome the shortness, in this study, special attention is paid to structural ceramics with self-crack-healing ability. There are several advantages for using a material with self-crack-healing ability. (1) After an efficient machine operation, the materials are able to self-heal the cracks introduced by the machining. (2) The materials are able to self-heal the cracks introduced during service and recover the strength completely at healing temperature. However, ways of organizing the available knowledge to increase the through-life reliability of ceramics components have not been extensively studied. The authors propose a new concept and the corresponding flowchart. This new concept is a promising technique for increasing the through-life reliability of ceramics components with excellent self-crack-healing ability.
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DOI: --
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