The influence of Y2O3-containing sintering additives on the oxidation of Si3N4-based ceramics and the interfacial interactions with liquid Al-alloys

Oliveira, M.I.L.L.; Agathopoulos, Simeon; Ferreira, J.M.F.

doi:10.1016/j.jeurceramsoc.2004.03.021

Cited by 19 publications

(3 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As shown in Figure 1 c, well-crystallized diffraction pattern grows corresponding to yttrium silicate Y 2 Si 2 O 7 (JCPDS NO. 48-1623) after calcination of the amorphous yttrium silicate at 1000 8C for 2 h. [33] However, the high temperature (1000 8C) results in the collapse of the hollow structures.…”

Section: Resultsmentioning

confidence: 99%

A General Route to Hollow Mesoporous Rare‐Earth Silicate Nanospheres as a Catalyst Support

Jin

Yang

Zou

et al. 2014

Chemistry A European J

View full text Add to dashboard Cite

Hollow mesoporous structures have recently aroused intense research interest owing to their unique structural features. Herein, an effective and precisely controlled synthesis of hollow rare-earth silicate spheres with mesoporous shells is reported for the first time, produced by a simple hydrothermal method, using silica spheres as the silica precursors. The as-prepared hollow rare-earth silicate spheres have large specific surface area, high pore volume, and controllable structure parameters. The results demonstrate that the selection of the chelating reagent plays critical roles in forming the hollow mesoporous structures. In addition, a simple and low-energy-consuming approach to synthesize highly stable and dispersive gold nanoparticle-yttrium silicate (AuNPs/YSiO) hollow nanocomposites has also been developed. The reduction of 4-nitrophenol with AuNPs/YSiO hollow nanocomposites as the catalyst has clearly demonstrated that the hollow rare-earth silicate spheres are good carriers for Au nanoparticles. This strategy can be extended as a general approach to prepare multifunctional yolk-shell structures with diverse compositions and morphologies simply by replacing silica spheres with silica-coated nanocomposites.

show abstract

Section: Resultsmentioning

confidence: 99%

A General Route to Hollow Mesoporous Rare‐Earth Silicate Nanospheres as a Catalyst Support

Jin

Yang

Zou

et al. 2014

Chemistry A European J

View full text Add to dashboard Cite

show abstract

“…It is believed that alkali atoms present as contaminants in the crucible material would diffuse into the surface and then dissolve in the melt. There are several works reporting that formation of the AlN scale at the contact point of Al (l) and sialon is responsible for the very slow corrosion attack of sialon and silicon nitride ceramics [4][5][6]. That type of the reaction is possible only in the oxygen free atmosphere as it occurred at the bottom of the crucible floating inside the Al melt (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Refractories in contact with molten aluminium must resist to aluminium penetration, chemical reaction with aluminium, mechanical damages, thermal spalling and attack by fluxes. Sialon-based refractories can be a solution as their low wettability by liquid aluminium was reported earlier [2][3][4]. Sialon ceramics based on the solid solution of AlN and Al 2 O 3 in β-Si 3 N 4 show excellent corrosion resistance to molten steel [5], slags and aluminium [4,6] but for application in a modern aluminium continuous casting system the refractories for the feed tube must meet additional requirements: porosity must be in the micrometer range as well as a low surface roughness and high dimension tolerance apart from the low production cost are essential.…”

Section: Introductionmentioning

confidence: 83%

Corrosion Resistance of Alumina-Sialon Refractories for Application in Aluminium Industry

Pawlik

Sopicka-Lizer

Mikuśkiewicz

et al. 2010

MSF

View full text Add to dashboard Cite

This paper describes the manufacturing and corrosion resistance of sialon based ceramics for application in the modern aluminium industry. Sialon based ceramics are characterized by excellent mechanical properties at high temperatures, good corrosion and thermal shock resistance and low wettability, thus this material is suitable for the long term liquid aluminium contact. To obtain reaction bonded materials in this work, relatively cheap and commonly available components were used: fine Si and Al2O3 powders. The specimens were examined after heating in flowing nitrogen for the phase composition and dimension stability. Sintered materials were tested for corrosion resistance and wettability in liquid aluminium. The microstructure of the contact surface was examined by SEM/EDS methods.

show abstract

Magnesia and Yttria Based Coatings for Direct‐Copper‐Bonding of Silicon Nitride Ceramics

Mueller

Frey

Roosen

et al. 2009

Advanced Ceramic Coatings and Interfaces IV

View full text Add to dashboard Cite

The influence of Y2O3-containing sintering additives on the oxidation of Si3N4-based ceramics and the interfacial interactions with liquid Al-alloys

Cited by 19 publications

References 27 publications

A General Route to Hollow Mesoporous Rare‐Earth Silicate Nanospheres as a Catalyst Support

A General Route to Hollow Mesoporous Rare‐Earth Silicate Nanospheres as a Catalyst Support

Corrosion Resistance of Alumina-Sialon Refractories for Application in Aluminium Industry

Magnesia and Yttria Based Coatings for Direct‐Copper‐Bonding of Silicon Nitride Ceramics

Contact Info

Product

Resources

About