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Full-Text Articles in Engineering
Creep Behavior And Deformation Mechanisms Of Spark Plasma Sintered Oxide Ceramics For Aerospace Systems At 1300˚C - 1400˚C, David D. Swanson
Creep Behavior And Deformation Mechanisms Of Spark Plasma Sintered Oxide Ceramics For Aerospace Systems At 1300˚C - 1400˚C, David D. Swanson
Theses and Dissertations
The mechanical behavior of YAG and LuAG was investigated at elevated temperatures. The specific materials investigated in this work include high-purity, polycrystalline YAG, high-purity, polycrystalline LuAG, and two doped variants of YAG: 2at% Yb-doped, polycrystalline YAG and 2at% Er-doped, polycrystalline YAG. Several billets of each material were prepared and processed by means of spark plasma sintering (SPS). Many different sintering parameters were utilized in order to obtain materials with various physical properties and to identify the effects of sintering parameters on the average grain size of the resulting materials. The compressive creep behavior of these materials was investigated at 1300°C …
Study Of Change In Beryllium Oxide Strength Properties As A Result Of Irradiation With Heavy Ions, M. V. Zdorovets, A. L. Kozlovskiy, D. B. Borgekov, D. I. Shlimas
Study Of Change In Beryllium Oxide Strength Properties As A Result Of Irradiation With Heavy Ions, M. V. Zdorovets, A. L. Kozlovskiy, D. B. Borgekov, D. I. Shlimas
Eurasian Journal of Physics and Functional Materials
The paper presents data on changes in strength properties, including data on microhardness, crack resistance, bending strength and wear of BeO ceramics as a result of irradiation with heavy accelerated ions. O2+ Kr15+ The following types of ions were selected as heavy ions: (28 MeV), Ar8+ (70 MeV), (147 MeV), Xe22+ (230 MeV). Radiation doses were 10 13 -10 15 ion/cm2 , which make it possible to assess the effect of both single defects arising from radiation, and cluster overlapping defective areas occurring at large radiation doses. During the studies carried out, it was found that an increase in the …
Thermophysical Properties Of Nominally Phase Pure Boride Ceramics, Austin D. Stanfield
Thermophysical Properties Of Nominally Phase Pure Boride Ceramics, Austin D. Stanfield
Doctoral Dissertations
"This research focusses on the thermophysical properties of nominally phase pure boride ceramics. As interest in ultra high temperature ceramics increases due to a renewed interest in hypersonic flight vehicles and with the expanding materials design space accompanying interest in high entropy materials, it is imperative to understand the intrinsic properties of boride ceramics. By reducing Hf content in ZrB2 from the natural abundance, ~1.75 at% in this case, to ~100 ppm, thermal conductivity increased from 88 W/m·K to 141 W/m·K. Removal of Hf allowed the thermal conductivity of ZrB2 with small transition metal solute additions to be …