Journal of Materials Research

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Atom-probe field ion microscope analysis of surfaces of materials
Journal of Materials Research - Tập 4 - Trang 1549-1559 - 2011
Tien T. Tsong, Chonglin Chen, Jiang Liu
Our recent applications of the atom-probe field ion microscope to the study of physics and chemistry of materials at the atomic level are summarized. The materials applicability of field ion microscopy has recently been extended to silicon, silicide, graphite, high Tc superconductors, and other materials. Atom-probe field ion microscopy has been used for atomic layer by atomic layer chemical analy... hiện toàn bộ
Synthesis and properties of strontium-doped yttrium manganite
Journal of Materials Research - Tập 9 - Trang 2645-2653 - 2011
Bo Fu, Wayne Huebner, Mladen F. Trubelja, Vladimir S. Stubican
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... hiện toàn bộ
Nghiên cứu về hiệu quả lắng đọng của dung môi trong quá trình xử lý sau chế tạo nanocrystals Dịch bởi AI
Journal of Materials Research - Tập 28 - Trang 3003-3009 - 2013
H.R. Chandan, Balakrishna R. Geetha
Nanocrystal CdSe chất lượng cao đã được tổng hợp thông qua tiền chất không hữu cơ và được chiết xuất trong các dung môi khác nhau. Sự khác biệt trong ảnh hưởng của tính chất dung môi như ethanol, N,N-dimethyl formamide (DMF) và acetonitrile đến việc chiết xuất cùng loại nanocrystals (NCs) đã được nghiên cứu liên quan đến chất lượng và độ ổn định của NCs. Việc đặc trưng bằng kỹ thuật nhiễu xạ tia X... hiện toàn bộ
#nanocrystals #CdSe #dung môi #photoluminescence #độ ổn định #lão hóa
Determination of plastic material properties by analysis of residual imprint geometry of indentation
Journal of Materials Research - Tập 27 - Trang 2167-2177 - 2012
Benjamin Schmaling, Alexander Hartmaier
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... hiện toàn bộ
Nanoindentation and contact-mode imaging at high temperatures
Journal of Materials Research - Tập 21 Số 3 - Trang 725-736
Christopher A. Schuh, Corinne E. Packard, Alan C. Lund
Technical 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 silica ... hiện toàn bộ
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
Douglas D. Stauffer, Ryan C. Major, David Vodnick, John H. Thomas, Jeff Parker, Mike Manno, Chris Leighton, William W. Gerberich
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... hiện toàn bộ
A solvothermal reaction route for the synthesis of CuFeS2 ultrafine powder
Journal of Materials Research - Tập 14 - Trang 3870-3872 - 2011
Junqing Hu, Qingyi Lu, Kaibin Tang, Yitai Qian, Guien Zhou, Xianming Liu
A 100-nm CuFeS2 ultrafine powder was prepared through a solvothermal reaction at 200–250 °C. X-ray powder diffraction and transmission electron microscopy results revealed that chalcopyrite-phase CuFeS2 was crystallized with single-crystalline nature and preferential orientation growth. Mössbauer spectrum exhibited a six-peak hyperfine magnetic spectrum and a single nonmagnetic peak. Elemental ana... hiện toàn bộ
PyCAC: The concurrent atomistic-continuum simulation environment
Journal of Materials Research - Tập 33 - Trang 857-871 - 2018
Shuozhi Xu, Thomas G. Payne, Hao Chen, Yongchao Liu, Liming Xiong, Youping Chen, David L. McDowell
We present a novel distributed-memory parallel implementation of the concurrent atomistic-continuum (CAC) method. Written mostly in Fortran 2008 and wrapped with a Python scripting interface, the CAC simulator in PyCAC runs in parallel using Message Passing Interface with a spatial decomposition algorithm. Built upon the underlying Fortran code, the Python interface provides a robust and versatile... hiện toàn bộ
A novel route for the synthesis of Sr1−xBaxNb2O6 thin films
Journal of Materials Research - Tập 10 - Trang 2404-2407 - 1995
A. Kashani, M. S. Tomar, E. Dayalan
Stoichiometric Sr1−xBaxNb2O6 (SBN) powder and thin films were prepared by a chemical method. The starting materials were niobium ethoxide and the hydroxides of strontium and barium. Powders were obtained by evaporation of the precursor solution, and thin films were deposited by spin coating. Annealing temperature required to obtain complete conversion to the crystalline material was about 700 °C. ... hiện toàn bộ
Room temperature deformation mechanisms of Mg/Nb nanolayered composites
Journal of Materials Research - - 2018
Milan Ardeljan, Marko Knezevic, Manish Jain, Siddhartha Pathak, Anil Kumar, Nan Li, Nathan A. Mara, J. Kevin Baldwin, Irene J. Beyerlein
In this work, the deformation mechanisms underlying the room temperature deformation of the pseudomorphic body centered cubic (BCC) Mg phase in Mg/Nb nanolayered composites are studied. Nanolayered composites comprised of 50% volume fraction of Mg and Nb were synthesized using physical vapor deposition with the individual layer thicknesses h of 5, 6.7, and 50 nm. At the lower layer thicknesses of ... hiện toàn bộ
Tổng số: 10,117   
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