Microcracking of high zirconia refractories after t→m phase transition during cooling: An EBSD study

Sibil, Arnaud; Douillard, Thierry; Cayron, Cyril; Godin, Nathalie; R’Mili, Mohamed; Fantozzi, Gilbert

doi:10.1016/j.jeurceramsoc.2011.02.033

Cited by 21 publications

(8 citation statements)

References 16 publications

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“…In addition, the mapping results are shown in Figure 10B, where the red domain corresponds to variants S 1 , the yellow domain corresponds to variants S 2 , and the green domain corresponds to variants S 3 . These results were in accordance with the work reported by Arnaud et al 32 and Humbert et al, 33 demonstrating that the orientation characteristics of monoclinic variants inherits in the cubic-tetragonal-monoclinic transformation in YSZ.…”

Section: Interleaving Growthsupporting

confidence: 93%

Growth modes for monoclinic yttria‐stabilized zirconia during the martensitic transformation

Wang

Gauvin

et al. 2017

J Am Ceram Soc

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The tetragonal to monoclinic martensitic transformation of plasma-sprayed 3 mol % Y 2 O 3 -ZrO 2 coatings is investigated by electron backscatter diffraction. The original metastable tetragonal phase shows an approximate "basal" texture with {001} t parallel to the coating surface. Based on the orientation analysis, plenty of monoclinic variants with atypical correspondence which indicates the c t axis transforms to the a m axis where (100) m //(001) t , (010) m , and (001) m //{110} t are clearly identified in addition to the correspondence where the c t axis transforms to the c m axis. Moreover, three growth modes are proposed and discussed according to strain accommodation. The observed sequential growth obeys the correspondence of the c t axis to the c m axis. Fourfold growth combines the correspondences of the c t axis to the c m and a m axes. The interleaving growth follows the correspondences of the c t axis to the c m axis within three tetragonal domains. These phenomena demonstrate the typical twin-related and self-accommodating configuration, which is in agreement with the phenomenological theory. These finding provide fundamental insight into the martensitic transformation mechanism and demonstrate a route for increasing the lifetime by controlling the tetragonal to monoclinic phase transformation. K E Y W O R D S electron backscatter diffraction, martensitic transformation, orientation relationship, yttria-stabilized zirconia

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Section: Interleaving Growthsupporting

confidence: 93%

Growth modes for monoclinic yttria‐stabilized zirconia during the martensitic transformation

Wang

Gauvin

et al. 2017

J Am Ceram Soc

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“…than for f.c.c. (Vaudin, 2005;Grossin et al, 2006;Abou-Ras et al, 2008;Zambaldi et al, 2009;Sibil et al, 2011). As the number of possible solutions is three times higher for b.c.t.…”

Section: Sensitivity Of Ebsd To the Tetragonal Lattice Distortionmentioning

confidence: 99%

Pitfalls of local and quantitative phase analysis in partially stabilized zirconia

et al. 2012

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When the formulae for calculating the interplanar spacing d 0 hkl for the seven primary lattices among the 14 Bravais lattices are used for crystal structures containing an additional atom, d 0 hkl must be corrected by multiplying by a correction coefficient. Based on a simple principle of analytical geometry, a new position-factor method has been developed to calculate these correction coefficients. The position factor P [where P = hx + ky + lz = s + m/q, the scalar product of the position (x, y, z) of an additional atom in a unit cell and any plane (hkl) passing through the additional atom] indicates the following characteristics of the (hkl) plane: whether there is an additional plane (m 6 ¼ 0) or not (m = 0), what the correction coefficient (m/q) is for the interplanar spacing if m 6 ¼ 0, and what the distance [(s + m/q)d 0 hkl ] is from the plane to the origin. In order to provide two examples of calculations using P, six possible interplanar spacings were obtained for a hexagonal close-packed crystal, and four possible interplanar spacings and the structure factor were obtained for a diamond crystal. In addition, the 12 undetermined plane indices in X-ray diffraction card 1-1249 (PDF-2, ICDD, Newtown Square, PA, USA) for diamond were determined using the new calculation.

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“…It induces a significant increase of the lattice volume. The second one is associated with the strongly anisotropic coefficients of thermal expansion of ZrO 2 at the grain scale [26], creating internal stresses as the block is cooled down (the thermal expansion coefficients along lattice directions b or c differ by ∼ one order of magnitude). Write res (x) for the complex field of residual stress that develops due to these two phenomena in a polycrystalline ZrO 2 specimen when it is very slowly cooled from a high temperature, i.e.…”

Section: Discussionmentioning

confidence: 99%

Neutron diffraction measurements of residual stress distribution in large zirconia based refractory bricks produced by electro-fusion and casting

Örs

Gouraud

Guinebretière

et al. 2017

Journal of the European Ceramic Society

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a b s t r a c tElectro-fusion and casting is used to produce large refractory bricks (∼250 kg) containing a high amount of ZrO 2 . These bricks are used in glass-making furnaces where good mechanical performance is required at very high temperatures (>1500• C). During the manufacturing procedure, they develop large residual stresses as a result of the cooling conditions and structural phase transformations they underwent. This leads to stress concentration and crack formation at different length scales. In order to characterize these phenomena, a 'multi-scale' analysis approach is under development, where different internal strain measurement methods are combined. In this approach we benefit from different gauge volumes provided by various diffraction methods, ranging from a few hundred nanometres to a few tens of millimetres. In the present paper, the results of neutron diffraction measurements on large ZrO 2 blocks are given. These results show the level of internal strains at the millimetre scale, based on (311) reflection of the monoclinic ZrO 2 . Overall, a range of 0.025% tensile to 0.1% compressive strain was observed. Clear strain gradients were also visible, as larger values in the interior of the block were encountered.

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Microcracking of high zirconia refractories after t→m phase transition during cooling: An EBSD study

Cited by 21 publications

References 16 publications

Growth modes for monoclinic yttria‐stabilized zirconia during the martensitic transformation

Growth modes for monoclinic yttria‐stabilized zirconia during the martensitic transformation

Pitfalls of local and quantitative phase analysis in partially stabilized zirconia

Neutron diffraction measurements of residual stress distribution in large zirconia based refractory bricks produced by electro-fusion and casting

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