Results 171 to 180 of about 540,129 (234)

New Process for Selective Additive Metallization of Alumina Ceramic Substrates

IEEE Transactions on Components, Packaging, and Manufacturing Technology, 2019
A newly developed laser-assisted process is presented, by which a selective additive metallization of injection-molded alumina ceramic substrates without additional additives is enabled.
E. Ermantraut, H. Müller, W. Eberhardt, P. Ninz, F. Kern, R. Gadow, A. Zimmermann   +6 more
semanticscholar   +1 more source

Joining alumina/zirconia ceramics

Materials Science and Engineering: A, 2003
Dense compacts consisting of 40 vol.% Al{sub 2}O{sub 3}-60 vol.% 3 mol% Y{sub 2}O{sub 3}-stabilized ZrO{sub 2} (YSZ) were joined with an interlayer of 50 vol.% Al{sub 2}O{sub 3}-50 vol.% YSZ. A joint was also made at 1200 {sup o}C with an interlayer that was 50 vol.% Al{sub 2}O{sub 3}-50 vol.% ZrO{sub 2}, in which the average particle size of both ...
K.C Goretta, F Gutierrez-Mora, J.J Picciolo, J.L Routbort   +3 more
openaire   +1 more source

Textured Alumina Ceramics by Uniaxial Pressing

Key Engineering Materials, 2001
7th Conference of the European-Ceramic-Society -- SEP 09-13, 2001 -- BRUGGE ...
Suvacı, Ender, Messing, GL
openaire   +1 more source

β-Alumina Ceramics

1974
It was found that β-aluminas could be prepared from a technical grade of α-Al2O3 and sodium or potassium carbonates only in the presence of V2O5 Sodium and potassium carbonates and alumina produced mixtures of β-alumina and alkali aluminate. Lithium carbonate failed to produce any β-alumina even in the presence of V2O5.
W. I. Abdel Fattah, A. T. Hussein
openaire   +1 more source

Ion modification of alumina ceramics

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2020
Abstract The patterns of depth microhardness, nanohardness and modulus of elasticity of alumina ceramics were investigated by microindentation and nanoindentation methods after treatment with a beam of ions of the composition: carbon ions (C+, Cn+) and protons (H+) in a ratio of 85%/15%. The accelerating voltage was 180 keV.
S. Ghyngazov, V. Kostenko, S. Shevelev, E. Lysenko, A. Surzhikov   +4 more
openaire   +1 more source

Retrieval analysis of squeaking alumina ceramic-on-ceramic bearings

The Journal of Bone and Joint Surgery. British volume, 2011
This multicentre study analysed 12 alumina ceramic-on-ceramic components retrieved from squeaking total hip replacements after a mean of 23 months in situ (11 to 61). The rates and patterns of wear seen in these squeaking hips were compared with those seen in matched controls using retrieval data from 33 ‘silent’ hip replacements with similar ceramic ...
W L, Walter, S M, Kurtz, C, Esposito, W, Hozack, K G, Holley, J P, Garino, M A, Tuke   +6 more
openaire   +2 more sources

Alumina ceramics fabricated from bimodal alumina with additives

Materials Science and Engineering: A, 2006
Abstract Superfine α-Al 2 O 3 synthesized by a precipitation method and commercial α-Al 2 O 3 were used to prepare bimodal alumina. Densification of bimodal alumina with MgO, SiO 2 as additives was investigated from 1400 to 1550 °C. The addition of superfine α-Al 2 O 3 is not effective to enhance the densification at the sintering temperature of ...
Jiang Li, Yubai Pan, Fagui Qiu, Liping Huang, Jingkun Guo   +4 more
openaire   +1 more source

Tribological Investigation of Multilayer Graphene Reinforced Alumina Ceramic Nanocomposites

Journal of tribology, 2018
We investigated the wear resistance properties of high-frequency induction heat (HFIH) sintered alumina (Al2O3) ceramic nanocomposites containing various multilayer graphene (MLG) concentrations.
I. Ahmad, S. Anwar, Fang Xu, Yanqiu Zhu
semanticscholar   +1 more source

Bonding of alumina ceramics with nanoscaled alumina powders

Nanostructured Materials, 1996
Abstract Nanoscaled Al2O3-powders can be employed for diffusion bonding of alumina ceramics. In order to accomplish bonding of the ceramics, Al2O3-nanopowder with a median particle size of 14 nm in diameter is sandwiched between two commercial microcrystalline corund discs, followed by uniaxially hot compressing of the assembly in vacuum at 80 MPa ...
H. Ferkel, W. Riehemann
openaire   +1 more source

Heat resistance of alumina ceramics

Refractories and Industrial Ceramics, 1999
A method for evaluating the heat resistance of structural ceramics according to which the thermally stressed state is created by blowing a directed air flow into the tip of a notch in a heated prismatic specimen is presented. For this purpose a special complexly shaped notch is formed in order to provide free inflow of the air to its tip. The radius of
D. A. Ivanov, A. I. Sitnikov, S. S. Semenychev, G. A. Fomina   +3 more
openaire   +1 more source