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Ruiz-Hervias, JAuthor

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January 10, 2022
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Effect of Al2TiO5 Content and Sintering Temperature on the Microstructure and Residual Stress of Al2O3-Al2TiO5 Ceramic Composites

Publicated to: MATERIALS. 14 (24): 7624- - 2021-12-01 14(24), DOI: 10.3390/ma14247624

Authors:

Fan, KY; Jiang, WH; Ruiz-Hervias, J; Baudin, C; Feng, W; Zhou, HB; Bueno, S; Yao, PP
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Affiliations

Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China - Author
Chengdu Univ, Sch Mech Engn, Chengdu 610106, Peoples R China - Author
Chengdu Univ, Sichuan Prov Engn Technol Res Ctr Powder Met, Chengdu 610106, Peoples R China - Author
CSIC, Inst Ceram & Vidrio, Kelsen 5, Madrid 28049, Spain - Author
Univ Jaen, Dept Chem Environm & Mat Engn, Campus Lagunillas, Jaen 23071, Spain - Author
Univ Politecn Madrid, Dept Mat Sci, ETSI Caminos Canales & Puertos, C Prof Aranguren S-N, Madrid 28040, Spain - Author
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Abstract

A series of Al2O3-Al2TiO5 ceramic composites with different Al2TiO5 contents (10 and 40 vol.%) fabricated at different sintering temperatures (1450 and 1550 degrees C) was studied in the present work. The microstructure, crystallite structure, and through-thickness residual stress of these composites were investigated by scanning electron microscopy, X-ray diffraction, time-of-flight neutron diffraction, and Rietveld analysis. Lattice parameter variations and individual peak shifts were analyzed to calculate the mean phase stresses in the Al2O3 matrix and Al2TiO5 particulates as well as the peak-specific residual stresses for different hkl reflections of each phase. The results showed that the microstructure of the composites was affected by the Al2TiO5 content and sintering temperature. Moreover, as the Al2TiO5 grain size increased, microcracking occurred, resulting in decreased flexure strength. The sintering temperatures at 1450 and 1550 degrees C ensured the complete formation of Al2TiO5 during the reaction sintering and the subsequent cooling of Al2O3-Al2TiO5 composites. Some decomposition of AT occurred at the sintering temperature of 1550 degrees C. The mean phase residual stresses in Al2TiO5 particulates are tensile, and those in the Al2O3 matrix are compressive, with virtually flat through-thickness residual stress profiles in bulk samples. Owing to the thermal expansion anisotropy in the individual phase, the sign and magnitude of peak-specific residual stress values highly depend on individual hkl reflection. Both mean phase and peak-specific residual stresses were found to be dependent on the Al2TiO5 content and sintering temperature of Al2O3-Al2TiO5 composites, since the different developed microstructures can produce stress-relief microcracks. The present work is beneficial for developing Al2O3-Al2TiO5 composites with controlled microstructure and residual stress, which are crucial for achieving the desired thermal and mechanical properties.
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Keywords

Al2 tio5Al2tio5Aluminum compoundsAluminum titanate compositesCeramicCeramic compositesCeramicsCrystal structureCrystallite sizeCrystallite structuresCrystals structuresDesignDiffractionMatrixMechanical-propertiesMicrocrackingMicrocracksMicrostructureNeutron diffractionParticulatesResidual stressesResistanceRietveld analysisRietveld refinementScanning electron microscopySinteringSintering temperaturesStress reliefThermal-stabilityThrough-thicknessTitanium compoundsX- ray diffractions

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal MATERIALS due to its progression and the good impact it has achieved in recent years, according to the agency WoS (JCR), it has become a reference in its field. In the year of publication of the work, 2021, it was in position 18/79, thus managing to position itself as a Q1 (Primer Cuartil), in the category Metallurgy & Metallurgical Engineering.

From a relative perspective, and based on the normalized impact indicator calculated from World Citations from Scopus Elsevier, it yields a value for the Field-Weighted Citation Impact from the Scopus agency: 1.02, which indicates that, compared to works in the same discipline and in the same year of publication, it ranks as a work cited above average. (source consulted: ESI Nov 13, 2025)

Specifically, and according to different indexing agencies, this work has accumulated citations as of 2026-04-26, the following number of citations:

  • WoS: 13
  • Scopus: 14
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Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2026-04-26:

  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 16 (PlumX).

It is essential to present evidence supporting full alignment with institutional principles and guidelines on Open Science and the Conservation and Dissemination of Intellectual Heritage. A clear example of this is:

  • The work has been submitted to a journal whose editorial policy allows open Open Access publication.
  • Assignment of a Handle/URN as an identifier within the deposit in the Institutional Repository: https://oa.upm.es/87004/

As a result of the publication of the work in the institutional repository, statistical usage data has been obtained that reflects its impact. In terms of dissemination, we can state that, as of

  • Views: 110
  • Downloads: 98
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Leadership analysis of institutional authors

This work has been carried out with international collaboration, specifically with researchers from: China.

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