Al2O3 - Explore the Science & Experts | ideXlab

Scan Science and Technology

Contact Leading Edge Experts & Companies

Al2O3

The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform

Richard R. Chromik – One of the best experts on this subject based on the ideXlab platform.

  • The influence of Al2O3 particle morphology on the coating formation and dry sliding wear behavior of cold sprayed Al-Al2O3 composites
    Surface and Coatings Technology, 2015
    Co-Authors: J. Michael Shockley, Sylvie Descartes, Phuong Vo, Eric Irissou, Richard R. Chromik

    Abstract:

    Five Al-Al2O3 coatings were deposited by gas dynamic cold spray, using feedstocks containing 0, 10, and 50wt.% of Al2O3 particles admixed into commercially pure Al powders. Two feedstocks were made using Al2O3 powders with an angular, blocky Al2O3 morphology, two feedstocks used Al2O3 powders with a spherical morphology, and the fifth consisted of 100% Al. The influence of Al2O3 concentration and morphology in the feedstock powders on the cold spray coating formation was measured in terms of Al2O3 recovery in the coatings, deposition efficiency, and microstructural analysis. The Al-Al2O3 coatings were then subjected to dry sliding wear experiments from which the friction, wear, and microevolution of third body structures in the wear track and transfer film were observed. The spherical Al2O3 morphology was associated with improved tribological behavior compared to the angular morphology when comparing similar coating concentrations of Al2O3.

Jiqing Lu – One of the best experts on this subject based on the ideXlab platform.

  • vapor phase hydrofluorination of acetylene to vinyl fluoride over la2o3 Al2O3 catalysts
    Journal of Fluorine Chemistry, 2009
    Co-Authors: Qingyuan Bi, Lin Qian, Liqiong Xing, Qiang Zhou, Jiqing Lu

    Abstract:

    Abstract A series of La-doped Al2O3 catalysts were prepared and tested for the vapor phase hydrofluorination of C2H2 to vinyl fluoride (CH2CHF, VF). It was found that the La-doped catalyst gave a stable catalytic performance and a higher selectivity to the desired VF and a lower selectivity to coke deposition compared with the pure Al2O3 catalyst. The enhancement in VF selectivity on the La-doped catalyst was due to the elimination of acidic sites on the Al2O3 surface by the addition of La2O3, evidenced by NH3–TPD results, which could also explain the declined selectivity to coke deposition on the catalyst. Raman result indicated there were two different vibration forms of C H distortion and C C expansion for the coke deposition.

J. Michael Shockley – One of the best experts on this subject based on the ideXlab platform.

  • The influence of Al2O3 particle morphology on the coating formation and dry sliding wear behavior of cold sprayed Al-Al2O3 composites
    Surface and Coatings Technology, 2015
    Co-Authors: J. Michael Shockley, Sylvie Descartes, Phuong Vo, Eric Irissou, Richard R. Chromik

    Abstract:

    Five Al-Al2O3 coatings were deposited by gas dynamic cold spray, using feedstocks containing 0, 10, and 50wt.% of Al2O3 particles admixed into commercially pure Al powders. Two feedstocks were made using Al2O3 powders with an angular, blocky Al2O3 morphology, two feedstocks used Al2O3 powders with a spherical morphology, and the fifth consisted of 100% Al. The influence of Al2O3 concentration and morphology in the feedstock powders on the cold spray coating formation was measured in terms of Al2O3 recovery in the coatings, deposition efficiency, and microstructural analysis. The Al-Al2O3 coatings were then subjected to dry sliding wear experiments from which the friction, wear, and microevolution of third body structures in the wear track and transfer film were observed. The spherical Al2O3 morphology was associated with improved tribological behavior compared to the angular morphology when comparing similar coating concentrations of Al2O3.