Densification and microstructure of Al2O3-cBN composites prepared by spark plasma sintering

Hotta, Mikinori; Goto, Takashi

doi:10.2109/jcersj2.116.744

Cited by 79 publications

(73 citation statements)

References 18 publications

(7 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…[206] A wide range of cBN or diamondbased composite materials with ceramic or hard metal matrix has been successfully produced by FAST/SPS. [207][208][209][210][211][212][213][214] Pure carbon nanotubes (CNT) can be densified with FAST/SPS without decomposition up to a density of 1.29 g cm -3 . The remaining pores are all below 6 nm.…”

Section: Non-equilibrium Materialsmentioning

confidence: 99%

Field‐Assisted Sintering Technology/Spark Plasma Sintering: Mechanisms, Materials, and Technology Developments

et al. 2014

View full text Add to dashboard Cite

Field-assisted sintering technology/Spark plasma sintering is a low voltage, direct current (DC) pulsed current activated, pressure-assisted sintering, and synthesis technique, which has been widely applied for materials processing in the recent years. After a description of its working principles and historical background, mechanical, thermal, electrical effects in FAST/SPS are presented along with the role of atmosphere. A selection of successful materials development including refractory materials, nanocrystalline functional ceramics, graded, and non-equilibrium materials is then discussed. Finally, technological aspects (advanced tool concepts, temperature measurement, finite element simulations) are covered.

show abstract

Section: Non-equilibrium Materialsmentioning

confidence: 99%

Field‐Assisted Sintering Technology/Spark Plasma Sintering: Mechanisms, Materials, and Technology Developments

et al. 2014

View full text Add to dashboard Cite

show abstract

“…No shrinkage of monolithic BN was observed at 1600°C for 600 s. We reported that the starting and finishing temperatures of shrinkage of Al2O3-BN composites containing 10 vol% cBN were 150°C and 100°C, respectively, higher than those of monolithic Al2O3. 17) On the other hand, the shrinkage of the mullite-10 vol% cBN composites was almost the same behavior as that of the monolithic mullite. The shrinkage of β SiAlON-10 vol% cBN composites finished at 150°C lower than that of monolithic β -SiAlON.…”

Section: Resultsmentioning

confidence: 82%

“…In the case of Al2O3-cBN composites, the phase transformation of cBN started at 1400°C. 17) The phase transformation temperature of the mullite-cBN composites was more than 200°C higher than that of Al2O3-cBN composites. In monolithic BN, the phase transformation temperature was 1650°C, 19) and therefore the mullite-BN composites had almost the same phase transformation temperature as that of monolithic BN.…”

Section: Resultsmentioning

confidence: 86%

“…In the case of Al2O3-cBN composites, the density of the Al2O3-10 vol% cBN composite drastically decreased to 85%. 17) In the case of β SiAlON-10-30 vol% cBN composites, on the other hand, the density was higher than that of monolithic β -SiAlON.…”

Section: Jcs-japanmentioning

confidence: 95%

“…The flake-like texture was characteristic of the phase transformation of cBN both in Al2O3-cBN and β SiAlON-cBN composites. 17),18) Figure 5 shows the Vickers hardness of monolithic mullite and mullite-BN composites originally containing 10-40 vol% cBN sintered at 1500-1700°C for 600 s. The Vickers hardness of the mullite-20 vol% cBN composite sintered at 1500°C had the highest value of 16 GPa. The increase in the hardness was caused by high-hardness cBN particles dispersed in the mullite matrix without the phase transformation to hBN.…”

Section: Jcs-japanmentioning

confidence: 99%

See 2 more Smart Citations

Densification, phase transformation and hardness of mullite-cubic BN composites prepared by spark plasma sintering

Hotta

Goto

2010

J. Ceram. Soc. Japan

Self Cite

View full text Add to dashboard Cite

Mullite-cubic boron nitride (cBN) composites were prepared using mullite and cBN powders by spark plasma sintering at temperatures of 1500-1700°C for a holding time of 600 s under a pressure of 100 MPa. Densification, microstructure and hardness of the mullite-BN composites and the phase transformation of cBN to hexagonal BN (hBN) in the mullite-BN composites were studied. Fully dense mullite-cBN composites originally containing 10-30 vol% cBN with relative density of over 95% were obtained at 1500°C without the phase transformation of cBN. At the cBN content of 10 vol%, the densification of the mullite-BN composite was not inhibited. When more than 20 vol% cBN was added to mullite, the densification of the mullite-BN composites was suppressed. The phase transformation of cBN in the mullite-BN composites started at 1600-1700°C. The hardness of mullite-BN composites originally containing 20 vol% cBN sintered at 1500°C without the phase transformation of cBN reached a maximum value of 16 GPa.

show abstract

Preparation of Mullite–TiC–ZrC-Ceramic Materials by a Plasma-ARC Method and Their Properties

Hmelov

2017

Refract Ind Ceram

View full text Add to dashboard Cite

Densification and microstructure of Al2O3-cBN composites prepared by spark plasma sintering

Cited by 79 publications

References 18 publications

Field‐Assisted Sintering Technology/Spark Plasma Sintering: Mechanisms, Materials, and Technology Developments

Field‐Assisted Sintering Technology/Spark Plasma Sintering: Mechanisms, Materials, and Technology Developments

Densification, phase transformation and hardness of mullite-cubic BN composites prepared by spark plasma sintering

Preparation of Mullite–TiC–ZrC-Ceramic Materials by a Plasma-ARC Method and Their Properties

Contact Info

Product

Resources

About