Monoclinic‐Tetragonal Transition of Zirconia

Lynch, C. T.; Vahldiek, F.W.; Robinson, Lawrence Baylor

doi:10.1111/j.1151-2916.1961.tb13732.x

Cited by 38 publications

(11 citation statements)

References 5 publications

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“…This difference is most probably caused by the implemented zirconium dioxide which has a density between 5.68 and 6.10 g cm −3 . 49 The measured density of 1.24 g cm −3 for the PSU-PVP membrane is in agreement with literature data for polysulfone. 50 As PSEBS-CM-DBC is based on various compounds, the density may be in the range of the specific densities.…”

Section: Resultssupporting

confidence: 90%

Evaluation of Diaphragms and Membranes as Separators for Alkaline Water Electrolysis

Brauns

Schönebeck

Kraglund

et al. 2021

J. Electrochem. Soc.

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Section: Resultssupporting

confidence: 90%

Evaluation of Diaphragms and Membranes as Separators for Alkaline Water Electrolysis

Brauns

Schönebeck

Kraglund

et al. 2021

J. Electrochem. Soc.

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“…The ZrO 2 inclusions within the scale underwent a phase transformation above 1100 °C, transforming from a monoclinic to a tetragonal structure. This transformation was accompanied by a volume decrease of approximately 7%;151 this created voids within the scale allowing the formation of MoO 3 bubbles. These bubbles eventually collapsed, leaving behind partially‐closed pores.…”

Section: Oxidation Behaviormentioning

confidence: 99%

Mo‐Si‐B Alloys for Ultrahigh‐Temperature Structural Applications

Lemberg¹,

Ritchie²

2012

Advanced Materials

253

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A continuing quest in science is the development of materials capable of operating structurally at ever-increasing temperatures. Indeed, the development of gas-turbine engines for aircraft/aerospace, which has had a seminal impact on our ability to travel, has been controlled by the availability of materials capable of withstanding the higher-temperature hostile environments encountered in these engines. Nickel-base superalloys, particularly as single crystals, represent a crowning achievement here as they can operate in the combustors at ~1100 °C, with hot spots of ~1200 °C. As this represents ~90% of their melting temperature, if higher-temperature engines are ever to be a reality, alternative materials must be utilized. One such class of materials is Mo-Si-B alloys; they have higher density but could operate several hundred degrees hotter. Here we describe the processing and structure versus mechanical properties of Mo-Si-B alloys and further document ways to optimize their nano/microstructures to achieve an appropriate balance of properties to realistically compete with Ni-alloys for elevated-temperature structural applications.

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“…It goes through a martensitic phase transformation from tetragonal-to-monoclinic by a thermal hysteresis loop, since it occurs at about 1150 • C during heating (monoclinic-to-tetragonal) and at about 950 • C during cooling (tetragonal-to-monoclinic). 12 It is well-known that the stress-induced transformation of metastable tetragonal ZrO 2 to monoclinic ZrO 2 consumes the energy of propagating crack and stop it from further propagation. To extend the crack further requires additional tensile stress.…”

Section: Introductionmentioning

confidence: 99%