Aqueous powder coating methods for preparation of grain boundary engineered ceramics

Walker, William J.; Brown, M.C; Amarakoon, Vasantha R. W.

doi:10.1016/s0955-2219(01)00166-2

Cited by 10 publications

(5 citation statements)

References 7 publications

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“…A different approach consists in the in situ formation of second-phase oxide particles by surface sol-gel coating. Gelation occurs during normal mixing, emulsion methods, use of organometallic compounds, and formation of chelated complexes between adsorbed organic additives and inorganic ions (36). Recently, some of the authors of this paper have developed a modified in situ second-phase formation method (37-39), in which a well-dispersed alumina suspension is mixed with the inorganic precursors of second phase, and then spray-dried to avoid second-phase segregation.…”

Section: Introduction: a Brief Overview Of Critical Issues For Ceramimentioning

confidence: 99%

Issues in Nanocomposite Ceramic Engineering: Focus on Processing and Properties of Alumina-based Composites

Palmero

Kern

Sommer

et al. 2014

Journal of Applied Biomaterials & Functional Materials

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Ceramic nanocomposites, containing at least one phase in the nanometric dimension, have received special interest in recent years. They have, in fact, demonstrated increased performance, reliability and lifetime with respect to monolithic ceramics. However, a successful approach to the production of tailored composite nanostructures requires the development of innovative concepts at each step of manufacturing, from the synthesis of composite nanopowders, to their processing and sintering. This review aims to deepen understanding of some of the critical issues associated with the manufacturing of nanocomposite ceramics, focusing on alumina-based composite systems. Two case studies are presented and briefly discussed. The former illustrates the benefits, in terms of sintered microstructure and related mechanical properties, resulting from the application of an engineering approach to a laboratory-scale protocol for the elaboration of nanocomposites in the system alumina-ZrO2-YAG (yttrium aluminium garnet). The latter illustrates the manufacturing of alumina-based composites for large-scale applications such as cutting tools, carried out by an injection molding process. The need for an engineering approach to be applied in all processing steps is demonstrated also in this second case study, where a tailored manufacturing process is required to obtain the desired results.

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Section: Introduction: a Brief Overview Of Critical Issues For Ceramimentioning

confidence: 99%

Issues in Nanocomposite Ceramic Engineering: Focus on Processing and Properties of Alumina-based Composites

Palmero

Kern

Sommer

et al. 2014

Journal of Applied Biomaterials & Functional Materials

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“…19,20 A novel approach to overcome the potential agglomeration of the sol-gel nanopowders and improve the dispersion of nanoparticles is to coat the coarser particles with sol 22,23 and to fabricate core-shell composites 9,24 where the coarse particles are representing the "cores" and the nanosized materials are forming "shells". By this way, macroporous alumina ceramics with improved functional characteristics were developed at a significantly reduced sintering temperature by coating a coarse alumina powder with a titanium sulfate solution.…”

Section: Introductionmentioning

confidence: 99%

“…22 In general the core-shell method is used for coating the powders with various sintering aids and dopants aiming at lower sintering temperatures and more uniform structures. 23 This novel technique has also been employed with success for the development of porous materials with tailored porous structures and surface properties using polymer spheres as templating cores and nanosized ceramic particles as coating material. 9,24 An excellent review on the core-shell approach and its different applications has been presented by Caruso.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of porous alumina ceramics from powder mixtures with sol–gel derived nanometer alumina: Effect of mixing method

Kritikaki

Tsetsekou

2009

Journal of the European Ceramic Society

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“…Now dispersed ceramic materials and natural materials with the modified surface capture attention of many experts [12,13]. Coatings on a surface of powders can be extremely useful giving to powders necessary properties -magnetic, luminescent, increasing mechanical strength or lowering temperature of fusion.…”

Section: 'Skin'-layers Formationmentioning

confidence: 99%

Heterogeneous Sol-Gel Systems – Derived Ceramics

Шилова

2010

Advances in Science and Technology

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Heterogeneous sol-gel systems (suspensions), synthesized by mixing sols and fillers of various dispersity (oxides, minerals, etc.), are successfully used to prepare glass-ceramic coatings. Sol composition (precursor, catalyst, solvent, dopants), filler dispersity and a homogenization mode for obtained suspensions essentially influence the properties of coatings formed. Here ways of the control of properties of heterogeneous sol-gel systems (by using various dopants, additives of organic low- and high-molecular compounds, as well as ultrasound) to reach set electro-physical and mechanical characteristics of coatings are considered in details. A number of examples of applications of glass-ceramic and hybrid coatings as well as ‘skin’ - layers are resulted.

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Aqueous powder coating methods for preparation of grain boundary engineered ceramics

Cited by 10 publications

References 7 publications

Issues in Nanocomposite Ceramic Engineering: Focus on Processing and Properties of Alumina-based Composites

Issues in Nanocomposite Ceramic Engineering: Focus on Processing and Properties of Alumina-based Composites

Fabrication of porous alumina ceramics from powder mixtures with sol–gel derived nanometer alumina: Effect of mixing method

Heterogeneous Sol-Gel Systems – Derived Ceramics

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