Strength characterization of yttria-partially stabilized zirconia/alumina composite

Govila, R. K.

doi:10.1007/bf01151247

Cited by 9 publications

(5 citation statements)

References 51 publications

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“…For SPSed samples, as increasing the sintering temperatures from 1150 1C to 1450 1C, the grain size increased from 101 nm to 467 nm and a more significant grain growth is observed at above 1450 1C. Although high sintering temperature of 1600 1C exhibited an enhanced grain growth and large average grain size of $ 888 nm, heterogeneous microstructures characterized by quite larger grains [7,24] cannot be observed from Fig. 2.…”

Section: The Effect Of Sintering Temperature On Densification and Miccontrasting

confidence: 53%

Spark plasma sintering and characterization of 2Y-TZP ceramics

Xue

Xie

Jiao

et al. 2015

Ceramics International

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Section: The Effect Of Sintering Temperature On Densification and Miccontrasting

confidence: 53%

Spark plasma sintering and characterization of 2Y-TZP ceramics

Xue

Xie

Jiao

et al. 2015

Ceramics International

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“…However, ZrO2 is sensitive to hydrothermal aging [4][5][6], and its hardness [2,7] is lower than that of zirconia toughened alumina (ZTA) [8][9] and Al2O3 ceramics [10], which limits its use as biomaterials or wear-resistant devices. There have been some works to improve the mechanical properties of ZrO2 ceramics through the ATZ method to make them more reliable and stable [6,[11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, there are a few nanoparticles in Al2O3 and ZrO2 grains, which exerts the effect of intracrystalline nano-toughening. This kind of microstructure is difficult to be realized by the previous preparation methods of nano-ATZ ceramics [6,[11][12][13][14][15][16][17][18][19]. More importantly, ZrO2 contained unprecipitated Al2O3, which may be very beneficial to improve the aging resistance of ZrO2 ceramics.…”

Section: Introductionmentioning

confidence: 99%

“…The hardness and toughness of the ATZ containing 20 wt% Al2O3 and 30 wt% Al2O3 prepared by Nevarez-Rascon et al [12][13] were 16.05 GPa, 7.7 MPa•m 1/2 and > 13 GPa, 6.9 MPa•m 1/2 , respectively. The 20wt%Al2O3/ZrO2(2.4mol% Y2O3) ceramics obtained by Govila et al [18] through the hot isostatic pressing (HIP) had a flexural strength up to 1764 MPa. Li et al [19] prepared 20wt%Al2O3/ZrO2(3mol% Y2O3) ceramics with the flexural strength of 967 MPa and the toughness of 5.27 MPa•m 1/2 by spark plasma sintering (SPS).…”

Section: Introductionmentioning

confidence: 99%

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Microstructural evolution and mechanical properties of nano-ATZ ceramics by solid solution precipitation

Yang

Yuan

et al. 2021

Preprint

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Alumina toughened zirconia (ATZ) nanoceramics with high-strength, high-toughness and high-hardness were prepared by in-situ nanoprecipitation from solid solution micro-powders. The submicron Al2O3 (~ 450 nm) and ZrO2 (~ 350 nm) grains contained low-density precipitated nano-ZrO2 (~ 40 nm) and nano-Y4Al2O9 (YAM, ~ 90 nm) particles, respectively, making high-performance nano-ATZ ceramics with ultrafine intracrystalline nanostructure yet achieved. There was a parallel or eutectic lattice orientation relationship between the submicrocrystals and its internal nanoparticles of their crystal planes, which is very conducive to the improvement of the mechanical properties of nano-ATZ ceramics. The fracture toughness and hardness of 30wt%Al2O3/70wt%ZrO2(3mol%Y2O3) can be as high as 5.68 ± 0.17 MPa·m1/2 (single-edge V-notched beam method, SEVNB) and 16.32 ± 0.45 GPa, respectively, which are improved by ~ 25 % and ~ 20 % compared with those of 3Y-TZP ceramics. Therefore, this method can be used to prepare nano-ATZ ceramics contained ultrafine nanoparticles and uniform distribution of Al2O3 phases.

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“…In general, different types of multi-phase materials can be modeled, including basic internal microstructures consisting of two different types of grains: Brittle, semi-brittle, or elasto-plastic (e.g., Al 2 O 3 /ZrO 2 [22,23,24,25,26,27], Al 2 O 3 /TiC, Al 2 O 3 /TiN [28,29]); elastic grains and elasto-plastic interfaces [14,15,16,17,18,19,30]; both elasto-plastic grains and interfaces fabricated from different materials.…”

Section: Introductionmentioning

confidence: 99%

Temperature Effects during Impact Testing of a Two-Phase Metal-Ceramic Composite Material

Postek

Sadowski

2019

Materials

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Metal-ceramic composite (MCC) materials can be used for manufacturing high-responsibility structures such as jet engines or cutting tools. One example of these materials is a two-phase wolfram carbide (WC) and cobalt (Co) composite. This MCC is a combination of hard WC grains with a Co metallic ductile binder. The resulting microstructure is a combination of two phases with significantly different mechanical behaviors. In this study, we investigate impact conditions, starting with an illustrative example of the Taylor impact bar where—although the process is very rapid—the equivalent plastic strain and temperature are higher in the adiabatic solution than those in the coupled solution. On exposing the WC/Co composite with a metallic binder to impact loading, heat is generated by plastic deformation. If the process is fast enough, the problem can be treated as adiabatic. However, a more common situation is that the process is slower, and the heat is generated in the ductile metallic binders. As a result, the associated grains are heated due to the conduction effect. Consequently, the process should be treated as coupled. When the impact is applied over a short time period, maximum temperatures are significantly lower if the process is analyzed as coupled rather than as adiabatic. The grains are immediately affected by temperature increase in the binders. Therefore, the heat conduction effect should not be omitted.

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Strength characterization of yttria-partially stabilized zirconia/alumina composite

Cited by 9 publications

References 51 publications

Spark plasma sintering and characterization of 2Y-TZP ceramics

Spark plasma sintering and characterization of 2Y-TZP ceramics

Microstructural evolution and mechanical properties of nano-ATZ ceramics by solid solution precipitation

Temperature Effects during Impact Testing of a Two-Phase Metal-Ceramic Composite Material

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