Materials Literature
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Electroplated copper thin films have started to be applied to the interconnection material in TSV structures because of its low electrical resistivity and high thermal conductivity. However, the material properties were found to vary drastically comparing with those of bulk copper. This was because that the microtextu…
Mechanical coating technique (MCT) as a novel film formation process was proposed and developed based on mechanical frictional wear and impacts among alumina balls, columns, disks used as the substrates, and metal powder particles used as the coating metal in the bowl of planetary ball mill or pot mill. Metal films of…
The overpack which is a disposal package for high-level radioactive waste has been required containment of radionuclides to prevent contact between groundwater and vitrified waste for a specified period. The method for ensuring long-term integrity of the over pack was considered on the condition that it corrodes as pr…
Graphene grown on substrates ordinarily have defects in its structure. Such defects affect the electronic properties of graphene. In this report, the atomic structures of graphene having a monovacancy or a multivacancy are equilibrated using first-principles calculations. The formation energies and bandgaps of the equ…
The Japan Soclety of Mechanlcal Englneers lC42
P-type bismuth telluride (Bi_2Te_3) thermoelectric very thin films (film thickness was 10〜30 nm) were deposited on a glass, Al_2O_3, and SrTiO_3 substrate by a coaxial type vacuum arc evaporation method for the enhancement of power factor. The as-deposited thin films were annealed in an electric furnace with high-puri…
We conceived engine generator system independent of crank. We presented new motion method of the system and maked experimental equipment. This paper shows motion method and experimental equipment.
Natural fiber reinforced biomass plastics (NFRPs) have been development because NFRPs are made from renewable resources and waste disposal of NFRPs is easy. Natural fibers have high specific modulus and strength, and thus natural NFRPs have a high potential for load-bearing materials. However, the dynamic and static f…
U radu su opisana svojstva čelika prikladnih za izradu ručnih reznih alata (noževa i škara) i njihova toplinska obrada. Opisana je klasična toplinska obrada, sastavljena od kaljenje i popuštanja, te primjena suvremenog postupka dubokog hlađenja. U eksperimentalnom dijelu rada provedeni su pokusi kaljenja, dubokog hlađ…
Polycarbonate(PC) has lightweight, ductility, low cost, high productivity and high heat resistance, which are utilized for biomedical and electrical articles, as well as wear, automobile and architecture. However, PC usually occur Hydrolysis at High temperature and high humidity environment. Thus it is a serious probl…
采用动态硫化法制备乙烯-醋酸乙烯酯共聚物（EVA）/氯化聚乙烯（CPE）/丁腈橡胶（NBR）共混型热塑性硫化胶（TPV）,研究TPV的应力-应变行为、微观相结构、Payne和Mullins效应.结果表明：甲基丙烯酸锌（ZDMA）补强TPV的储能模量随应变的增大而显著下降,表现出典型的Payne效应;TPV存在明显的Mullins效应,相同拉伸比下,与EVA/CPE/NBR TPV相比,ZDMA补强TPV的最大应力、瞬时残余应变、内耗、损耗因子和软化因子均有所提高.
Temperature and frequency dependence of Young's modulus and internal friction of La_<0.6>Sr_<0.4>Co_<0.2>Fe_<0.8>O_<3-δ> were evaluated by dynamic mechanical analysis. A relaxation peak in the internal friction which follows a significant decrease in the Young's modulus was observed. It was suggested that the peak was…
Discussed the parameters of the process of hardening fraction: the treated surface coverage prints speed fractions and diameter for maximum effect by fatigue strength. Full use of the strength and ductility of the steel processed shot, achieved at the maximum uniform strain on the workpiece surface. Rational work-hard…
In this study, simultaneous and direct observation of visible and infrared images of frictional surface was conducted to understand the scuffing phenomenon. A contact area was produced between a rotating sapphire disc and a stationary steel ball. Visible and near infrared images, load, and friction were synchronously…
Material Removal Rate of sapphire CMP using silica slurry with the fullerenol increase as the higher concentration of the fullerenol in the slurry. The surface roughness of the sapphire substrate gives the influence against the MRR of sapphire CMP. Raman spectra indicate that molecule structure did not change during C…
Considering space utilization of the nanocrystalline metals, the influence of the nano-scale void is investigated via molecular dynamics (MD) method. As to nanocrystalline metals, grain boundary deformation is one of the important factors to explain the material characteristics. Considering the grain boundary deformat…
Carbon Nitride (CNx) coating shows ultra low friction coefficient (μ<0.01) in dry Nitrogen gas. Transformed layer is important to show low friction, but it is not clear what the ultra low friction mechanism is. To clarify low friction mechanism, hardness of transformed layer is important to measure friction coefficien…
Debye formulas for the relaxational polarization and hopping conductivity is proposed. The essence of the model is based on the acceptance of Debye formulas for permittivity and conductivity and dependence of relaxation rate on electric field frequency. On the basis of the model as an example, the analysis of electrop…
Fatigue crack propagation experiments on approximately 100-nm- and 500-nm-thick freestanding copper (Cu) films were conducted to clarify the thickness dependence on fatigue crack propagation. Fatigue crack propagation rate da/dN of the 100-nm-thick films against stress intensity factor range ΔK was larger than that of…
The mechanical conditions of fatigue crack initiation were evaluated on roughly 500 nm thick freestanding copper films. Fatigue experiments and fatigue damage observations by using field emission scanning electron microscope (FESEM) and electron backscatter diffraction (EBSD) analysis revealed that an intrusion/extrus…