High temperature mechanical properties of reaction-sintered mullite/zirconia and mullite/alumina/zirconia composites

Orange, G.; Fantozzi, Gilbert; Cambier, F.; Leblud, C.; Anseau, M. R.; Leriche, Anne

doi:10.1007/bf00556085

Cited by 73 publications

(20 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…shows good accordance with data from this study, aside from the large peak observed at 800°C, which the authors attribute to a large amount of glassy phase present, which was not observed in the materials in this paper. Also, unfortunately, they did not measure the thermal expansion data to look at transformation temperatures . Hamidouche et al.…”

Section: Discussionmentioning

confidence: 99%

“…Despite this, there is very little data available for either mullite or composites of mullite at elevated temperatures. Orange et al . found that pure mullite retains its fracture toughness with temperature, whereas 25 vol% zirconia containing mullite composites by reactive sintering of zircon and alumina had a generally decreasing trend of toughness as temperature is raised aside from a slight increase between 600°C and 800°C.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High‐temperature fracture toughness of mullite with monoclinic zirconia

et al. 2017

View full text Add to dashboard Cite

Reactive sintering of zircon and alumina and zirconia additions to mullite are well-established methods for improving the poor fracture toughness of mullite.While it is clear that transformation toughening is responsible for the improved toughness by addition of partially stabilized zirconia, it is not clear why adding unstabilized zirconia increases the toughness although microcracking and crack deflection have been suggested. Therefore, the fracture toughness of a mullite composite with 20 vol% unstabilized zirconia and a monolithic mullite were investigated at ambient conditions and at temperatures up to 1225°C. It was found that monoclinic zirconia increases the toughness at ambient conditions from the monolithic mullite value of 1.9 to 3.9 MPaÁm 1/2 . The toughness of the composite with zirconia remains relatively constant from ambient to 600°C but then decreases rapidly. The mechanism for the toughness enhancement as well as the reason for its variation with temperature are explained using changes in residual stress state as deduced using the sphere in shell model from the measured thermal expansion behavior.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High‐temperature fracture toughness of mullite with monoclinic zirconia

et al. 2017

View full text Add to dashboard Cite

show abstract

“…A brief summary of properties achieved and processing methods used in prior studies are summarized in Table 1 [4][5][6][7][8][9][10][11][12][13][14][15][16]. The information presented in Table 1 clearly shows that shape forming of the zirconia-mullite composites is typically reported using either uniaxial or isostatic pressing.…”

Section: Please Scroll Down For Articlementioning

confidence: 98%

Sintering Characteristics of a Powder Injection Molded Ceria-Stabilized Zirconia–Mullite Composite

Martin¹,

Vick²,

Enneti³

et al. 2015

Materials and Manufacturing Processes

View full text Add to dashboard Cite

Powder injection molding (PIM) technology has the potential for economically manufacturing several complex-shaped zirconia-mullite components in mass production. The sintering behavior of a zirconia-mullite composite fabricated by injection molding was analyzed in this paper. The focus of this study is to assess the dependence on properties and microstructure on PIM processing conditions. The sintered density of the samples displayed a strong dependence on sintering temperature. The hardness of the samples followed a similar trend as sintered density. A maximum fracture toughness of 4.1 AE 0.3 MPa Á m 1/2 and strength around 450 AE 60 MPa was observed for samples sintered at 1500 C for 4 h. The properties from this study are significantly higher than the values reported in majority of the prior studies where other technologies like uniaxial and cold isostatic pressing were used to fabricate zirconia-mullite composites. The above results support the suitability of PIM as a manufacturing process for complex-shaped zirconia-mullite components with good mechanical properties.

show abstract

“…Direct co-densification of fine mullite powders and various zirconia powders has been investigated too [5,6]. The creep resistance of mullite has been widely studied by many researchers, yet some aspects are still not fully resolved.…”

Section: Introductionmentioning

confidence: 99%