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Smirnov A, Beltrán JI, Rodriguez-Suarez T, Pecharromán C, Muñoz MC, Moya JS, Bartolomé JF. Unprecedented simultaneous enhancement in damage tolerance and fatigue resistance of zirconia/Ta composites. Sci Rep 2017; 7:44922. [PMID: 28322343 PMCID: PMC5359604 DOI: 10.1038/srep44922] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Accepted: 02/14/2017] [Indexed: 11/28/2022] Open
Abstract
Dense (>98 th%) and homogeneous ceramic/metal composites were obtained by spark plasma sintering (SPS) using ZrO2 and lamellar metallic powders of tantalum or niobium (20 vol.%) as starting materials. The present study has demonstrated the unique and unpredicted simultaneous enhancement in toughness and strength with very high flaw tolerance of zirconia/Ta composites. In addition to their excellent static mechanical properties, these composites also have exceptional resistance to fatigue loading. It has been shown that the major contributions to toughening are the resulting crack bridging and plastic deformation of the metallic particles, together with crack deflection and interfacial debonding, which is compatible with the coexistence in the composite of both, strong and weak ceramic/metal interfaces, in agreement with predictions of ab-initio calculations. Therefore, these materials are promising candidates for designing damage tolerance components for aerospace industry, cutting and drilling tools, biomedical implants, among many others.
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Affiliation(s)
- A Smirnov
- Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior deInvestigaciones Científicas (CSIC), C/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain.,Moscow State University of Technology "STANKIN", Vadkovskij per. 1, Moscow, 101472, Russian Federation
| | - J I Beltrán
- Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior deInvestigaciones Científicas (CSIC), C/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - T Rodriguez-Suarez
- Element Six UK Ltd, Global Innovation Centre, Fermi Avenue, Harwell Oxford, Didcot, OX11 0QR, UK
| | - C Pecharromán
- Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior deInvestigaciones Científicas (CSIC), C/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - M C Muñoz
- Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior deInvestigaciones Científicas (CSIC), C/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - J S Moya
- Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior deInvestigaciones Científicas (CSIC), C/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain.,Nanomaterials and Nanotechnology Research Center (CINN), CSIC-University of Oviedo (UO), Avda de la Vega 4-6, El Entrego, 33940 San-Martín del Rey Aurelio, Spain
| | - J F Bartolomé
- Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior deInvestigaciones Científicas (CSIC), C/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
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Esteban-Tejeda L, Malpartida F, Esteban-Cubillo A, Pecharromán C, Moya JS. Antibacterial and antifungal activity of a soda-lime glass containing copper nanoparticles. Nanotechnology 2009; 20:505701. [PMID: 19907067 DOI: 10.1088/0957-4484/20/50/505701] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A low melting point soda-lime glass powder containing copper nanoparticles with high antibacterial (against gram-positive and gram-negative bacteria) and antifungal activity has been obtained. Sepiolite fibres containing monodispersed copper nanoparticles (d(50) approximately 30 +/- 5 nm) were used as the source of the copper nanoparticles. The observed high activity of the obtained glass powder, particularly against yeast, has been explained by considering the inhibitory synergistic effect of the Ca(2+) lixiviated from the glass on the growth of the colonies.
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Affiliation(s)
- L Esteban-Tejeda
- Instituto de Ciencia de Materiales de Madrid, CSIC, Sor Juana Inés de la Cruz 3, Cantoblanco, Madrid 28049, Spain
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Esteban-Tejeda L, Malpartida F, Esteban-Cubillo A, Pecharromán C, Moya JS. The antibacterial and antifungal activity of a soda-lime glass containing silver nanoparticles. Nanotechnology 2009; 20:085103. [PMID: 19417439 DOI: 10.1088/0957-4484/20/8/085103] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The antibacterial and antifungal activity of a low melting point soda-lime glass powder containing silver nanoparticles has been studied. Nano-Ag sepiolite fibres containing monodispersed silver nanoparticles (d(50) approximately 11 +/- 9 nm) were used as the source of silver. This powder presents a high antibacterial (against gram-positive and gram-negative bacteria) as well as antifungal (against I. orientalis) activity. The observed high activity against yeast has been explained by considering the inhibitory effect of the Ca(2+) lixiviated from the glass on the growth of the yeast colonies.
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Affiliation(s)
- L Esteban-Tejeda
- Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, Madrid 28049, Spain
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Beran A, Libowitzky E, Burianek M, Mühlberg M, Pecharromán C, Schneider H. Infrared and Raman spectroscopy of mullite-type Bi2Ga4O9. Cryst Res Technol 2008. [DOI: 10.1002/crat.200800396] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Rodriguez-Suarez T, Díaz LA, Lopez-Esteban S, Pecharromán C, Esteban-Cubillo A, Gremillard L, Torrecillas R, Moya JS. Epitaxial growth of tungsten nanoparticles on alumina and spinel surfaces. Nanotechnology 2008; 19:215605. [PMID: 21730578 DOI: 10.1088/0957-4484/19/21/215605] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Isolated tungsten nanoparticles (α-W and β-W phase) were synthesized and epitaxially grown on alumina and spinel particle surfaces with an average tungsten size of ≤20 nm for a low tungsten content (of ≤1.5 vol%). Using tungsten (VI) ethoxide alcoholic solutions, tungsten trioxide hydrated precursors were attached to a ceramic grains surface as a nanoparticle coating. High-resolution transmission electron microscopy (HRTEM) micrographs showed epitaxial interfaces between alumina, spinel and metallic tungsten. This epitaxial growth is assumed to be due to the effect of water vapour on the sublimation of ortho-tungstic acid during the reduction process in a hydrogen atmosphere. The planes involved in the epitaxy were found to be [Formula: see text] and [Formula: see text].
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Affiliation(s)
- T Rodriguez-Suarez
- Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC), C/ Sor Juana Inés de la Cruz 3, 28049, Cantoblanco, Madrid, Spain
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Pecharromán C, Cuesta A, Gutiérrez C. Calculation of adsorption-induced differential external reflectance infrared spectra of particulate metals deposited on a substrate. J Electroanal Chem (Lausanne) 2004. [DOI: 10.1016/j.jelechem.2003.09.013] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Pecharromán C, Cuesta A, Gutiérrez C. Comments on the paper by M.-S. Zheng and S.-G. Sun entitled ‘In situ FTIR spectroscopic studies of CO adsorption on electrodes with nanometer-scale thin films of ruthenium in sulfuric acid solutions’ [J. Electroanal. Chem. 500 (2001) 223]. J Electroanal Chem (Lausanne) 2002. [DOI: 10.1016/s0022-0728(02)00968-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Pecharromán C, Sobrados I, Iglesias JE, González-Carreño T, Sanz J. Thermal Evolution of Transitional Aluminas Followed by NMR and IR Spectroscopies. J Phys Chem B 1999. [DOI: 10.1021/jp983316q] [Citation(s) in RCA: 174] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- C. Pecharromán
- Instituto de Ciencia de Materiales, Consejo Superior de Investigaciones Cientificas, Cantoblanco 28049, Madrid, Spain
| | - I. Sobrados
- Instituto de Ciencia de Materiales, Consejo Superior de Investigaciones Cientificas, Cantoblanco 28049, Madrid, Spain
| | - J. E. Iglesias
- Instituto de Ciencia de Materiales, Consejo Superior de Investigaciones Cientificas, Cantoblanco 28049, Madrid, Spain
| | - T. González-Carreño
- Instituto de Ciencia de Materiales, Consejo Superior de Investigaciones Cientificas, Cantoblanco 28049, Madrid, Spain
| | - J. Sanz
- Instituto de Ciencia de Materiales, Consejo Superior de Investigaciones Cientificas, Cantoblanco 28049, Madrid, Spain
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Pecharromán C, Iglesias JE. Effective dielectric properties of packed mixtures of insulator particles. Phys Rev B Condens Matter 1994; 49:7137-7147. [PMID: 10009450 DOI: 10.1103/physrevb.49.7137] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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