Y. Nishi

Effects of EB irradiation on spring constant of C/C composite coil

In order to enhance a spring constant of C/C composite coil spring, the electron beam irradiation was homogeneously performed. The EB irradiation largely enhanced initial spring constants, which were higher than that before EB irradiation. The constant spring constant was also obtained by 150 Mrad-irradiation for the C/C composite coil spring.

Shape Memory Ceramics

PROBLEM TO BE SOLVED: To provide a shape-memory ceramics which is excellent in heat-and corrosion resistance but deforms in response to temp. SOLUTION: The shape-memory ceramics 10 is constituted by heating two glass chips 12, 14 different in composition, such as soda-lime glass and Pyrex glass (borosilicate glass), to a temp. of not less than the softening point to weld the chips. Or, the two glass chips may be bonded by other bonding method such as adhesion. The shape-memory ceramics 10 deforms by a large extent especially at a temp. range of 200-300 deg.C as B2O3 being a component of the Pyrex glass enters in the glass transition temp. range.

Ecological uses of tourmaline

Tourmaline is very famous as the birthstone of October. It is also generally known as a mineral with piezoelectricity and pyroelectricity. Furthermore, tourmaline is expected as one of the ecological and intelligent materials. Thus, the authors introduce the effects of tourmaline on ecological properties. Furthermore, tourmaline enhances the growth rate of plants. From an ecological paint of view, they introduce that the ecological uses of tourmaline are effective in preventing excess energy consumption.

SOLID-UNDERCOOLED LIQUID INTERFACIAL ENERGY OF Pd-Cu-Si ALLOY GLASS

Based on the homogeneous nucleation theory, the solid-undercooled liquid interfacial energy is estimated by use of the frequency of nucleation, the melting point, the entropy change on solidification and the Fulchers type viscosity in undercooled liquid. This energy is about 120 mJ/m 2 of Pd-6at%Cu-16at%Si alloy glass. The value of solid-liquid interfacial energy is found to be quite close to that calculated by several assumption which is correlated to the viscosity at melting point.

Effect of Sheet Electron-Beam Irradiation (SEBI) on Water Wettability of Mirror-Finished Si Wafer

The influence of sheet electron beam irradiation ( SEBI ) on the water-wettability of the ( 100 ) plane on the Si wafer etched by hydrofluoric acid ( HF ) is investigated. The wettability energy is estimated from the contact angle of water. The SEBI treatment decreases the contact angle and increases the interfacial energy. Aging decreases the change in the interfacial energy. A rate process is inferred for the interfacial energy changes on the Si wafer.

Change in resistance to micro-plastic deformation in Bi-Pb-Sb-Sr-Ca-Cu-O

Abstracts are not published in this journal

Effect of equiaxial microplastic deformation before final annealing on Tc of liquid-quenched Bi1.6Pb0.4Sr2Ca2Cu2.7Ti0.3Ox crystallized

The influence of the treatment (equiaxial microplastic deformation and final annealing) on the Tc0value is studied for the liquid-quenched Bi1.6Pb0.4Sr2Ca2Cu2.7Ti0.3Ox which is crystallized. The treatment increases the Tc0value. Based on results of X-ray diffraction and electrical resistivity, the Tc0change is discussed.

IMPROVEMENT OF BRITTLENESS BY Ti ADDITION FOR HIGH Tc Bi OXIDE

When Ti atoms are substituted for Cu atoms in the high Tc phase, the Ti addition improves ductility without the Tc decreasing. Based on results of lattice constants, the influences of the Ti substitution on ductility are discussed.

INFLUENCE OF Sb ADDITION ON Tc OF Bi-Pb-Sr-Ca-Cu-O

The effect of Sb addition on Tcmid are investigated for Bi1.6Pb0.4Sr2Ca2Ox. Using electrical results, the influence of Sb addition on Tcmid are discussed.

EFFECTS OF COLD-WORKING ON Tc FOR Ti ADDED AND LIQUID- QUENCHED Bi OXIDE

Influence of the cold-working before annealing on the Tc value is studied for the liquid- quenched Bi1.6Pb0.4Sr2Ca2Cu2.7Ti0.3Ox which is crystallized. The cold-working before the annealing increases the Tc value. Based on results of the x-ray diffraction, the Tc mid value change is discussed.