Materials Literature
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Flow Accelerated Corrosion (FAC) is one of the issues to be noticed considerably in plant piping management. For the integrity and safety of the plant, the wall-thinning and thinning rate due to FAC should be predicted, and we hope to construct the model to predict the wall thinning rate. We have studied FAC from the…
International audience
We have investigated rare-earth hexaboride, and found that YbB_6 and EuB_6 have high thermoelectric properties. In the present study, we synthesized YbB_6 nano-particles and its sintered compact in order to improve TE performance. The YbB_6 was synthesized by two different methods. One of them is "molten salt method"…
After briefly reviewing some preparation schemes of porous polymeric materials, polymer foaming methods which use supercritical carbon dioxide (CO_2) or nitrogen (N_2) as a physical blowing agent are brought into focus. Microcellular foams whose cell size is less than 10 μm and cell density is higher than 10^8 cm^<-3>…
Intrinsic multiferroic properties of native vacancies in BiFeO_3 are investigated by density-function calculations. Oxygen vacancies characteristically exhibit the strong anisotropy in ferroelectric polarization and locally enhance the magnetic moment of its neighboring Fe atoms, while the other Bi and Fe vacancies ha…
In order to investigate the relationship between hydrogen induced hardening of austenitic stainless steel and the hydrogen content, the spherical micro-indentation tests and thermal desorption analyses have been conducted on hydrogen charged austenitic stainless steel JIS SUS316L. Hydrogen has been charged by using ca…
采用铜模吸铸法制备[Fe0.71（DyxNd1-x）0.05B0.24]96Nb4（x=0—1，摩尔分数）块体合金，利用X射线衍射（XRD）、差示扫描量热仪（DSC）和振动样品磁强计（VSM）研究合金的非晶形成能力（GFA）和磁性能。结果表明：该体系合金均具有较好的非晶形成能力，可制备出直径为2mm的完全非晶合金，随着Dy含量（x）的增加，合金的非晶形成能力逐渐增强。当x=1时，可制得直径为3iD_rn的完全非晶合金；饱和磁化强度（Ms）由x=O时的Ms=97．59A·m^2／kg逐渐降低到x=1时的Ms=75.85A·m^2／kg。该体系直径为2mm的块体非晶合金均表现为明显的软磁性特征。
The theory of quantum relaxation of nanoelectromechanical systems (NEMS) energy storage in materials is under consideration. By using the method of quantum kinetics the relaxation of NEMS energy storage in the form of Fe 172 сuboid limited by (100) type planes in fcc iron crystal has been studied. For comparison, the…
利用熔融缩聚的方法将N-甲基二乙醇胺与丁二酸和1，4-丁二醇共聚，制备含N的聚丁二酸丁二酯（PBS）共聚物（N-PBS1，然后将其与纤维素衍生物羟乙基纤维素（HEC）进行溶液共混，制备了在水相中均匀分散的共混乳液，用流延成膜法制备了N-PBS／HEC共混膜。研究了N-PBS中—N（CH3）-基团的含量对N-PBS亲水性及共混膜性能的影响。结果表明，随着N-PBS中-N（CH3）-含量的增加，N-PBS极性增加，亲水性增强；相对于PBS，N-PBS与HEC的相容性得到改善，共混膜的热分解温度在300℃以上，热稳定性良好，其透过率和断裂伸长率也随着N—PBS中—N（CH3）-含量的增加而提高。
Self-healing materials attract much attention because of their ability to repair the internal and external damages, thereby extending the lifetime of the material in numerous applications that we cannot repair easily. Diarylbibenzofuranone (DABBF), which is a dimer of arylbenzofuranone, can reach a state of radically…
This research proposes a method for fabricating CuO nanostructures by utilizing atomic diffusion including electromigration and stress migration. The samples are subjected to a current stressing under different combinations of current density and temperature. After current stressing, the samples are kept in atmosphere…
Recently, adhesive bonding has been used in functional composite structures. The purpose of our work was to clarify the characteristics of strength for metal-CFRP adhesive bonded structures. We analyzed four types of single-lap adhesive joints subjected to 3-point bending moment by finite element method. In addition,…
This paper describes primarily the development of the liquid fed joule-heated ceramic melter (LFCM) process for the vitrification of high-level radioactive liquid waste (HLLW) since 1977 in Japan. In 2013 the active test at the vitrification facility (K-facility) in Rokkasho commercial reprocessing plant was successfu…
Effects of variable fatigue loading with alternate R-ratios on fatigue life of a quasi-isotropic woven fabric CFRP laminate have been studied. Variable R-ratio fatigue tests are carried out in which the stress ratio of fatigue loading alternates between two values that are associated with the same number of cycles to…
PCD is expected to apply to a wear part or a sliding part because PCD has superior mechanical properties. Therefore, high efficiency and high quality method of processing PCD is required. The authors proposed the high-speed constant-pressure grinding that is processing method to increase the grinding wheel speed with…
This report contains the development and construction of a new patented doctor blade. A doctor blade is used when creping soft paper from a large rotating Yankee cylinder. At the current state the ...
Rubbing noise of a paper with guides in paper-handling mechanism is getting louder now with the higher sheet feeding speed in printer or copy machine. This research deals with the paper vibration caused by sliding contact with guides. The purpose of this research is establishing a theory of rubbing noise. First, it wa…
We investigate effects of solute atoms on twin boundaries and surfaces of Mg alloys by First-principles calculations. Most of solute atoms are stable or unstable at each twin boundary sites, depending on the atomic radius; solute atoms larger than Mg are stable at the extension site on twin boundaries and unstable at…
Experimental evaluations of interlaminar tensile strength for stitched CFRP curved panels were carried out. Vectran^[○!R] fiber with 200 denier was used as stitch thread. L-shape specimens were loaded by four point bending test, and interlaminar tensile strength was measured. Interlaminar tensile strength of stitched…
The Japan Soclety of Mechanlcal Englneers 2G3 PTFE