Influence of the sintering additives on the phase composition and the thermal conductivity of aluminium nitride ceramics

Surnev, S.; Lepkova, D.; Yoleva, A.

doi:10.1016/0921-5107(91)90092-a

Cited by 16 publications

(17 citation statements)

References 11 publications

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“…This is once again confirmed by Lopez et al [91] where the presence of excessive intergranular glassy phase reduced the thermal conductivity, hardness, and fracture toughness of the sintered SiC samples. Similar behavior is noticed in the Al 2 O 3 -Y 2 O 3 by Sigl [104], She and Ueno [89] in the SiC densification, and Surnev et al [26] in the AlN densification (Fig. 7).…”

Section: Materials Parameterssupporting

confidence: 79%

“…Yoshioka et al [24], Surnev et al [26], and Du et al [27] conducted an equivalent research on the AlN densification. From Table 6, it can be inferred that Y 2 O 3 and CaO are the most studied sintering aids for AlN system and compared by Molisani et al [119].…”

Section: Materials Parametersmentioning

confidence: 98%

“…These pores are detrimental to the sintered densities and thus final properties. For example, Surnev et al [26] compared the efficiencies of different sintering aids over the density and thermal conductivity of AlN. From Fig.…”

Section: Materials Parametersmentioning

confidence: 98%

“…Extensive research is done on fabricating SiC and AlN via slip casting [24,25], tape casting [26,27], hot pressing (HP) [28,29], hot isostatic pressing (HIP) [30,31], and cold isostatic pressing (CIP) [32,33]. Methodologies of these techniques are detailed elsewhere [34].…”

Section: Introductionmentioning

confidence: 99%

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Review of Net Shape Fabrication of Thermally Conducting Ceramics

Onbattuvelli

Atre

2011

Materials and Manufacturing Processes

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Section: Materials Parameterssupporting

confidence: 79%

Section: Materials Parametersmentioning

confidence: 98%

Section: Materials Parametersmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Review of Net Shape Fabrication of Thermally Conducting Ceramics

Onbattuvelli

Atre

2011

Materials and Manufacturing Processes

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“…1) However, its poor machinability owing to high cutting force and brittle fracture behavior make it difficult to utilize AlN for complex precision parts. 2) It is known that the addition of hexagonal boron nitride (hBN) improves the machinability of AlN.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties and machinability of AlN-hBN ceramics prepared by spark plasma sintering

Xu¹,

Lee²,

Beck

et al. 2009

J. Ceram. Soc. Japan

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AlN-hBN ceramic composites with 3 mass% CaF2 were fabricated by spark plasma sintering at 1800°C for 10 min. The effects of hBN content on mechanical properties, microstructure, and machinability of AlN-hBN composites were investigated. With increasing hBN content, relative density, flexural strength, and Young's modulus decreased, whereas fracture toughness increased slightly. Vickers' indentation cracks are largely deflected near hBN platelets, implying a weak interfacial bond between the AlN and the hBN. The fracture surfaces of AlN-hBN composites showed a higher tendency of intergranular fracture than monolithic AlN. During end-milling processes, the cutting resistance decreased with hBN content, demonstrating the machinability of AlN ceramic can be improved significantly by the addition of hBN.

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Cathodoluminescence imaging—the study of yttrium aluminates distribution in aluminum nitride

Wang

1995

Scanning

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Summary: Cathodoluminescence imaging is a technique which may combine a high-resolution spectroscopic method with a high-spatial resolution electron imaging technique to characterize chemical identity as well as physical size, shape, and spatial distribution of the materials which have cathodoluminescence. Cathodoluminescence imaging has been used to characterize yttrium aluminates in aluminum nitride ceramics. By digitally combining cathodoluminescence and backscattering electron images, it is possible not only to distinguish between different yttrium aluminates, but also to determine the size, shape, and spatial distribution of these phases. This information provides a route to understanding the local residual oxygen concentration before sintering, the amount of sintering aid to be added, and possible sintering schedule. Furthermore, this information may be related to other properties of aluminum nitride such as residual oxygen concentration and thermal conductivity.

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Influence of the sintering additives on the phase composition and the thermal conductivity of aluminium nitride ceramics

Cited by 16 publications

References 11 publications

Review of Net Shape Fabrication of Thermally Conducting Ceramics

Review of Net Shape Fabrication of Thermally Conducting Ceramics

Mechanical properties and machinability of AlN-hBN ceramics prepared by spark plasma sintering

Cathodoluminescence imaging—the study of yttrium aluminates distribution in aluminum nitride

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