Influences of Laser Ablation Processes on Solubility and Crystallizability of Al2O3-ZrO2 Nanopowders

doi:10.3724/SP.J.1077.2006.00677

Abstract

Abstract: The influences of laser ablation processes on the solubility and the crystallizability of laser evaporated Al₂O₃-ZrO₂nanopowders were studied by X-ray diffractometer (XRD), X-ray absorption fine structure (XAFS) spectroscope and high resolution electron microscope (HREM). Results indicate that ZrO₂ crystalline lattice with an increasing solid solubility exhibits larger disorder. Increasing air pressure in the sample chamber favors the formation of amorphous ZrO₂.
Amorphous ZrO₂ consists of Zr-O-Zr (Al) clusters with short-range order but long-range disorder. The Zr-O and Zr-Zr (Al) interatomic distances in amorphous ZrO₂ are shorter and the disorder of amorphous ZrO₂ is larger than that of crystalline Al₂O₃-ZrO₂ solid solutions.

Key words: laser ablation, Al2O3-ZrO2 solubility, crystallizability, disorder

CLC Number:

TB44

YANG Xiu-Chun,DUBIEL M,HOFMEISTER H,RIEHEMANN W,HUANG Wen-Hai. Influences of Laser Ablation Processes on Solubility and Crystallizability of Al₂O₃-ZrO₂ Nanopowders[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2006.00677.

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Influences of Laser Ablation Processes on Solubility and Crystallizability of Al₂O₃-ZrO₂ Nanopowders

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