Influence of test temperature on post irradiation, high temperature tensile and creep properties of X8 CrNiMoNb 1616, X10 NiCrAlTi 32 20 (Alloy 800) and NiCr22Fe18Mo (Hastelloy X)

Thiele, B.A.; Schubert, Florian; Derz, H.; Pott, G.

doi:10.1016/0022-3115(90)90352-n

Cited by 6 publications

(1 citation statement)

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“…Yttria-stabilized zirconia (YSZ) due to its low thermal conductivity, chemical inertness, radiation resistance, and high mechanical properties has been proposed for a wide range of applications in the nuclear industry, such as inert matrix fuel, diffusion barrier to avoid fuel-matrix interaction, sacrificial coatings, and thermal insulator, among others [1][2][3][4][5][6]. However, some of these applications require the deposition of YSZ at low temperatures (for example, 1050 °C on T91 steel or 800 °C on Ni alloys) to avoid phase changes or considerable reductions on mechanical properties on thermolabile substrates [3,7,8]. In addition to this requirement, for nuclear applications, the production of YSZ with a fully cubic structure is also desirable to increase its tolerance to neutron irradiation [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Effect of Deposition Conditions on Phase Content and Mechanical Properties of Yttria-Stabilized Zirconia Thin Films Deposited by Sol-Gel/Dip-Coating

Cano

Castilleja-Escobedo

Espinoza-Pérez

et al. 2021

Journal of Nanomaterials

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The effect of yttria concentration (0-33.4 mol%), extraction rates (0.17, 0.33, 0.50, and 0.67 mm s-1), and the number of layers (up to four) on the phase content, surface defects, thickness, hardness, adhesion strength, and wear rate of yttria-stabilized zirconia coatings produced by sol-gel/dip-coating were studied for its use on thermolabile substrates. At 700°C, a metastable tetragonal phase ( t ″ ) was obtained even with 33.4 mol% yttria when heat treated for 24 hours; however, a fully cubic structure was attained by extending the heat treatment up to 48 hours as confirmed by Raman spectroscopy. Furthermore, it was necessary to use withdrawal speeds of at least 0.67 mm s-1 to produce defect-free coatings. Although the coatings were produced at low temperature, they showed 41% lower wear rate than steel and an adhesion strength of 30 MPa. Our work stresses the importance of the heat treatment history on the stabilization of the cubic phase in sol-gel YSZ coatings.

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