Journal of Materials Research
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Synthesis and properties of strontium-doped yttrium manganite
Journal of Materials Research - Tập 9 - Trang 2645-2653 - 2011
The system Y1−xSrxMnO3 (x = 0.000, 0.005, 0.010, 0.050, and 0.100) was studied as a potential cathode material for solid oxide fuel cells. Powders were prepared using an organometallic precursor; however, achieving homogeneous compositions was complicated due to the presence of intermediate, metastable phases. The desired hexagonal Y1−xSrxMnO3 phase formed from the precursor at 800 °C, while small......
Determination of plastic material properties by analysis of residual imprint geometry of indentation
Journal of Materials Research - Tập 27 - Trang 2167-2177 - 2012
A method is presented for the identification of plastic material properties, i.e., yield strength and work hardening rate, using the residual imprint geometry formed by a spheroconical indentation. A corresponding finite element simulation with the same tip geometry and maximum as applied in the indentation experiment yields a numerical imprint profile. Then, the imprint profiles resulting from si......
Nanoindentation and contact-mode imaging at high temperaturesTechnical issues surrounding the use of nanoindentation at elevated temperatures are discussed, including heat management, thermal equilibration, instrumental drift, and temperature-induced changes to the shape and properties of the indenter tip. After characterizing and managing these complexities, quantitative mechanical property measurements are performed on a specimen of standard fused... ...
Journal of Materials Research - Tập 21 Số 3 - Trang 725-736
Plastic response of the native oxide on Cr and Al thin films from in situ conductive nanoindentation
Journal of Materials Research - Tập 27 - Trang 685-693 - 2012
Thin native oxide layers can dominate the mechanical properties of metallic thin films. However, to date there has been little quantification of how such overlayers affect yield and fracture during indentation in constrained film systems. To gain insight into such processes, electrical contact resistance was measured in situ during nanoindentation on constrained thin films of epitaxial Cr and poly......
Raman spectroscopic determination of phase evolutions in LiAlxCo1−xO2 battery materials
Journal of Materials Research - Tập 16 - Trang 1-4 - 2011
Superior battery materials LiAlxCo1−xO2 (x = 0.0, 0.1, 0.3, 0.5, and 0.7) were synthesized using a solution-based route at various sintering temperatures (450–800 °C). In this communication, we report on the use of Raman spectroscopy to study effect of composition and sintering temperature on the resulting material. The phase evolutions in LiAlxCo1−xO2 compositions were studied using micro-Raman s......
Structure and electrochemical performance of LiFePO4modified with mononuclear and binuclear phthalocyanines as cathode materialsAbstract
Journal of Materials Research - - 2017
Surface irradiation and materials processing using polyatomic cluster ion beams
Journal of Materials Research - Tập 27 - Trang 806-821 - 2012
We developed a polyatomic cluster ion beam system for materials processing, and polyatomic clusters of materials such as alcohol and water were produced by an adiabatic expansion phenomenon. In this article, cluster formation is discussed using thermodynamics and fluid dynamics. To investigate the interactions of polyatomic cluster ions with solid surfaces, various kinds of substrates such as Si(1......
Fracture toughness of nanocrystalline metal matrix composites reinforced by aligned carbon nanotubesAbstract
Journal of Materials Research - Tập 30 Số 21 - Trang 3267-3276 - 2015
Molecular CO emission accompanying fracture of polycarbonate: Evidence for chain cleavage
Journal of Materials Research - - 1993
Oxidation of carbon on nickel-based metallic substrates: Implications for high-temperature superconductor coated conductors
Journal of Materials Research - Tập 20 - Trang 765-773 - 2005
Adhesion of thin films of epitaxial oxides to nickel-based metallic substrates is important for the successful development of high-temperature superconductor coated conductors. Detachment of epitaxial oxide buffer layers at the oxide/metal interface during either oxide growth or subsequent processing renders the conductor useless. In this study, thermal desorption spectroscopy (TDS) has been used ......
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