Functionally graded SiAlON ceramics

Çalış, N.; Kuşhan, Seniz Reyhan; Kara, Ferhat; Mandal, Hasan

doi:10.1016/j.jeurceramsoc.2003.10.019

Cited by 16 publications

(10 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…β -sialon typically has acicular grains [71,80], while α -sialon typically has equiaxed grain structure [71], but can be produced with a bimodal equiaxed-acicular microstructure by careful selection of starting composition and control of sintering conditions, or use of elongated seed crystals in the starting powder [81], with resultant improved fracture toughness and thermal shock resistance [82]. The intrinsically higher fracture toughness of β -sialon is due to the in situ reinforced microstructure.…”

Section: Sialonmentioning

confidence: 99%

A review of the processing, composition, and temperature-dependent mechanical and thermal properties of dielectric technical ceramics

et al. 2011

View full text Add to dashboard Cite

The current review uses the material requirements of a new space propulsion device, the Variable Specific Impulse Magnetoplasma Rocket (VASIMR ® ) as a basis for presenting the temperature dependent properties of a range of dielectric ceramics, but data presented could be used in the engineering design of any ceramic component with complementary material requirements. A material is required for the gas containment tube (GCT) of VASIMR ® to allow it to operate at higher power levels. The GCT's operating conditions place severe constraints on the choice of material. A dielectric is required with a high thermal conductivity, low dielectric loss factor, and high thermal shock resistance. There is a lack of a representative set of temperature-dependent material property data for materials considered for this application and these are required for accurate thermo-structural modelling. This modelling would facilitate the selection of an optimum material for this component. The goal of this paper is to determine the best material property data values for use in the materials selection and design of such components. A review of both experimentally and theoretically-determined temperature-dependent & room temperature properties of several materials has been undertaken. Data extracted are presented by property. Properties reviewed are density, Young's, bulk and shear moduli, Poisson's ratio, tensile, flexural and compressive strength, thermal conductivity, specific heat capacity, thermal expansion coefficient and the factors affecting maximum service temperature. Materials reviewed are alumina, aluminium nitride, beryllia, fused quartz, sialon and silicon nitride.

show abstract

Section: Sialonmentioning

confidence: 99%

A review of the processing, composition, and temperature-dependent mechanical and thermal properties of dielectric technical ceramics

et al. 2011

View full text Add to dashboard Cite

show abstract

“…Since the discovery of sialon in 1971 some attractive properties of high toughness, heat resistance and wear resistance, etc. have been reported [1]. In particular, the applications of ␤-sialon to high temperature engineering ceramics, cutting tools and abrasive materials [2] are promising.…”

Section: Introductionmentioning

confidence: 99%

A new route to synthesize β-Si6−zAlzOzN8−z powders

Aoyagi¹,

Hiraki²,

Ramakrishnan³

et al. 2007

Journal of Alloys and Compounds

View full text Add to dashboard Cite

“…The glassy phase appears white because of the high cation content. This continuous change is one of the main advantages of the tape casting approach over the powder lamination approach where a relatively sharp transition zone is usually present between layers 11 . The presence of a sharp transition zone may affect the mechanical properties of FG‐SiAlONs negatively.…”

Section: Resultsmentioning

confidence: 99%

“…As a FG structure is ideal for smooth reduction of thermal stresses at interfaces, development of FG‐SiAlON ceramics is expected to provide better mechanical properties than either monolithic α‐ or β‐SiAlON and α‐/β‐SiAlON composites. There are a few studies to fabricate FG‐SiAlON ceramics in the literature 8–14 via various techniques, including diffusion‐controlled processes such as the powder bed technique, lamination, infiltration, as well as controlling the sintering condition. However, there is still need for a processing approach that will enable one to better control and extend the degree of gradient through the FG‐SiAlONs.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Functionally Graded SiAlON Ceramics by Tape Casting

Açıkbaş

Suvacı

Mandal

2006

Journal of the American Ceramic Society

Self Cite

View full text Add to dashboard Cite

Functionally graded SiAlON ceramics (FG-SiAlONs) were successfully prepared by the tape casting and lamination approach. Non-aqueous SiAlON slurries with five different a to b-SiAlON ratios (85a:15b, 70a:30b, 55a:45b, 40a:60b, and 25a:75b) were prepared by a 66 methyl ethyl ketone/34 ethanol (vol%) mixture. Phase and microstructure analyses incorporation with hardness measurements clearly show that the FG-SiAlONs, prepared by tape casting, exhibit a continuous and gradual change in composition and hardness. Thus, the tape casting approach is a viable method to produce FG-SiAlONs with a precisely controlled composition, and subsequently properties, as a function of position.

show abstract

Functionally graded SiAlON ceramics

Cited by 16 publications

References 8 publications

A review of the processing, composition, and temperature-dependent mechanical and thermal properties of dielectric technical ceramics

A review of the processing, composition, and temperature-dependent mechanical and thermal properties of dielectric technical ceramics

A new route to synthesize β-Si6−zAlzOzN8−z powders

Fabrication of Functionally Graded SiAlON Ceramics by Tape Casting

Contact Info

Product

Resources

About