Tailored Al2O3-Al2TiO5-TiO2 Composite Ceramics from different Titanium Precursors

• Autorzy: Dittert B. , Wiessner M. , Angerer P. , Lackner J. M. , Leichtfried H.

Identyfikatory

DOI

10.24425/amm.2019.130091

• Języki publikacji: EN

Abstrakty

EN

Al₂ O₃ -Al₂ TiO₅ -TiO₂ composites can be obtained by the infiltration of molecular titanium precursors into presintered α-Al₂ O₃ (corundum) cylinders. Two titanium tetra alkoxides, and two dialkoxy titanium bis (acetylacetonates) serve as precursors for TiO₂ (rutile) and Al₂ TiO₅ (tialite). The precursors were infiltrated as ethanolic solutions. After sintering at 1550, 1600, and 1650°C, the prepared ceramics’ properties were investigated by SEM, in-situ HT-XRD, and conventional XRD. Titanium tetraisopropoxide leads to the highest content of Al₂ TiO₅ in the composite. The more reactive the precursor, considering the Al₂ O₃ /precursor interface, the lower and more anisotropic the grain growth, the more homogeneous is the TiO₂ contribution and the higher is the content of Al₂ TiO₅ . Raising the sintering temperature causes an increase of the crystalline Al₂ TiO₅ content as well as of the grain growth. Moreover, the reactivity of the precursor molecule influences the Ti/(Al+Ti) ratio in the obtained tialite phase.

Słowa kluczowe

EN

composite; precursor; infiltration; alumina; tialite

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2019
• Tom: Vol. 64, iss. 4
• Strony: 1277--1286
• Opis fizyczny: Bibliogr. 49 poz., fot., rys., tab., wzory

Twórcy

autor

Dittert B.

• Profactor GmbH, Department Functional Surfaces and Nanostructures, im Stadtgut A2, 4407 Steyr-Gleink, Austria

autor

Wiessner M.

• Materials Center Leoben, Roseggerstrasse 12, 8700 Leoben, Austria

autor

Angerer P.

• Materials Center Leoben, Roseggerstrasse 12, 8700 Leoben, Austria

autor

Lackner J. M.

• Joanneum Research Forschungsgesellschaft mbH, Institute for Surface Technologies and Photonics, Leobner Strasse 94, 8712 Niklasdorf, Austria

autor

Leichtfried H.

• Profactor GmbH, Department Functional Surfaces and Nanostructures, im Stadtgut A2, 4407 Steyr-Gleink, Austria

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Uwagi

EN

This work was supported by the Austrian Federal Government (in particular from the Bundes ministerium für Verkehr, Innovation und Technologie and the Bundesministerium für Wirtschaft, Familie und Jugend, represented by Österreichische Forschungsförderungsge sellschaft mbH (FFG) within the project "SOLDOT" (grant number #834189).