Fracture of Ferroelectric / Ferroelastic Ceramics
铁电/铁弹性陶瓷的断裂
基本信息
- 批准号:EP/E040225/1
- 负责人:
- 金额:$ 11.86万
- 依托单位:
- 依托单位国家:英国
- 项目类别:Research Grant
- 财政年份:2007
- 资助国家:英国
- 起止时间:2007 至 无数据
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Many technologically important ceramics are ferroelastic. This includes lead zirconate titanate (PZT), which is a ferroelectric that is widely used for piezoelectric applications, and lanthanum strontium manganate (LSM), which is an electronic conductor that is used as a cathode material in solid oxide fuel cells. The objective of the proposed research is to investigate and understand the overlooked problem of fracture at notches in ferroelastic ceramics subjected to compressive loading. Ceramics are often preloaded in compression to avoid brittle failure. However, preliminary work by us has demonstrated that compression-compression loading of ferroelectric ceramics can produce fracture at surprisingly small far-field stresses. The results of this work have significant implications for the design and performance of ferroelastic ceramic components. The origin of the effect may be the relatively large strain irreversibility produced in ferroelastic ceramics and the tensile stresses that this can generate on unloading. In the case of polar materials, electric displacements at the notch may induce large local electric fields that may produce additional damage. The objective of the research is to investigate the factors that influence fracture, determine the mechanisms for fracture and crack growth and to model the problem using finite element analysis. An important outcome of the work will be an improved knowledge of good design practice for ferroelectric / ferroelastic ceramic components.
许多技术上重要的陶瓷是铁弹性的。这包括锆钛酸铅(PZT),其是广泛用于压电应用的铁电体,以及镧锶钡(LSM),其是用作固体氧化物燃料电池中的阴极材料的电子导体。建议的研究的目的是调查和理解的铁弹性陶瓷受到压缩载荷的缺口断裂被忽视的问题。陶瓷通常在压缩中预加载以避免脆性破坏。然而,我们的初步工作已经表明,压-压加载的铁电陶瓷可以产生断裂在令人惊讶的小远场应力。研究结果对铁弹陶瓷元件的设计和性能具有重要意义。这种效应的起因可能是铁弹性陶瓷中产生的相对较大的应变不可逆性和卸载时可能产生的拉应力。在极性材料的情况下,缺口处的电位移可能会引起大的局部电场,这可能会产生额外的损坏。研究的目的是调查影响断裂的因素,确定断裂和裂纹扩展的机制,并使用有限元分析对问题进行建模。这项工作的一个重要成果将是提高铁电/铁弹陶瓷元件的良好设计实践的知识。
项目成果
期刊论文数量(3)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Effect of Loading Rate on Domain Switching in Ferroelastic/Ferroelectric Perovskite Ceramics
加载速率对铁弹性/铁电钙钛矿陶瓷中磁畴切换的影响
- DOI:
- 发表时间:2010
- 期刊:
- 影响因子:0
- 作者:N/a Viola
- 通讯作者:N/a Viola
Effect of composition on rate dependence of ferroelastic/ferroelectric switching in perovskite ceramics
钙钛矿陶瓷中成分对铁弹性/铁电转换速率依赖性的影响
- DOI:10.1179/026708309x12474766656218
- 发表时间:2013
- 期刊:
- 影响因子:1.8
- 作者:Viola G
- 通讯作者:Viola G
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Michael Reece其他文献
Recommendations for Developing Contextually Relevant HIV/AIDS Prevention Strategies Targeting African-Born Immigrants and Refugees in the United States.
针对美国非洲出生的移民和难民制定与具体情况相关的艾滋病毒/艾滋病预防战略的建议。
- DOI:
10.1089/apc.2016.0171 - 发表时间:
2016 - 期刊:
- 影响因子:4.9
- 作者:
Caroline Kingori;Camila LeMaster Esquivel;Qorsho Hassan;Abdul Elmi;Bakali Mukasa;Michael Reece - 通讯作者:
Michael Reece
Alcohol Use During a College Special Event Week: Utilizing an Internet-Based Daily Diary Approach
- DOI:
10.1016/j.jadohealth.2008.10.066 - 发表时间:
2009-02-01 - 期刊:
- 影响因子:
- 作者:
Nathan W. Stupiansky;Michael Reece;Peter Finn;Susan E. Middlestadt;Catherine Sherwood-Laughlin - 通讯作者:
Catherine Sherwood-Laughlin
Masturbation Frequency and Patterns Among U.S. Adolescents
- DOI:
10.1016/j.jadohealth.2009.11.087 - 发表时间:
2010-02-01 - 期刊:
- 影响因子:
- 作者:
Cynthia Robbins;J. Dennis Fortenberry;Michael Reece;Debra Herbenick;Stephanie Sanders;Brian Dodge - 通讯作者:
Brian Dodge
97. Court-Based Herpes Simplex Virus Type 2 (HSV-2) Point-of-Care Testing: Collaborating With the Judicial System to Improve Access to Sexual Health Screening
- DOI:
10.1016/j.jadohealth.2010.11.144 - 发表时间:
2011-02-01 - 期刊:
- 影响因子:
- 作者:
Alexis Roth;Brian Dodge;Michael Reece;Barbara Van Der Pol;Gregory Zimet - 通讯作者:
Gregory Zimet
Erratum: Building and sustaining community-institutional partnerships for prevention research: Findings from a national collaborative (Journal of Urban Health DOI: 10.1007/s11524-006-9113-y)
勘误:建立和维持预防研究的社区机构伙伴关系:国家合作的调查结果(城市健康杂志 DOI:10.1007/s11524-006-9113-y)
- DOI:
10.1007/s11524-006-9140-8 - 发表时间:
2007 - 期刊:
- 影响因子:6.6
- 作者:
I. Bayer;Diane C. Calleson;Michael Reece;A. Amodeo;S. Holmes;Sarena D. Seifer;Nancy Shore;B. Israel;Paula M. Lantz;B. Maciak;Robert McGranaghan;E. Parker;A. Schulz;M. Spencer;Richard Mack;L. Anderson;E. Greene;E. Lewis;D. McLinden;Sharrice White;S. Galea;Sarah Sisco;D. Vlahov;S. Ciske;Alison Eisinger;J. Krieger;K. Senturia;Gary Tang;K. Hartwig;D. Katz;Margot M Zaharek - 通讯作者:
Margot M Zaharek
Michael Reece的其他文献
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{{ truncateString('Michael Reece', 18)}}的其他基金
DEFCOM: Designing Eco-Friendly and COst-efficient energy Materials
DEFCOM:设计环保且经济高效的能源材料
- 批准号:
EP/N022726/1 - 财政年份:2016
- 资助金额:
$ 11.86万 - 项目类别:
Research Grant
Development of SrPbO3 for the growth of nanostructures: a feasibility study
用于纳米结构生长的 SrPbO3 的开发:可行性研究
- 批准号:
EP/F06702X/1 - 财政年份:2008
- 资助金额:
$ 11.86万 - 项目类别:
Research Grant
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