Abstract: The present invention has solved the problems of conventional molding materials, and provides a hydraulic composition for additive manufacturing devices having high strength development, particularly high early strength development, and less generation of gas defect and graphite spheroidization defect. Specifically, the hydraulic composition for additive manufacturing devices of the present invention at least contains calcium aluminate. It is preferable that the hydraulic composition contain 0.5-10 parts by mass of gypsum with respect to 100 parts by mass of the calcium aluminate.

Abstract: The present invention has solved the problems of conventional molding materials, and provides a hydraulic composition for additive manufacturing devices having high strength development, particularly high early strength development, and less generation of gas defect and graphite spheroidization defect. Specifically, the hydraulic composition for additive manufacturing devices of the present invention at least contains calcium aluminate. It is preferable that the hydraulic composition contain 0.5-10 parts by mass of gypsum with respect to 100 parts by mass of the calcium aluminate.

Abstract: A negative electrode active material includes a silicon-containing alloy represented by: SixSnyMzAa (A is unavoidable impurities, M is one or more transition metal elements, x, y, z, and a represent values of percent by mass, and 0<x<100, 0<y<100, 0<z<100, and 0?a<0.5 and x+y+z+a=100). The silicon-containing alloy has a lattice image subjected to Fourier transform processing to obtain a diffraction pattern. A distance between Si regular tetrahedrons is 0.39 nm or more when the distance between Si regular tetrahedrons in an amorphous region calculated from a Fourier image obtained by subjecting a diffraction ring portion present in a width of from 0.7 to 1.0 when a distance between Si regular tetrahedrons is 1.0 in this diffraction pattern to inverse Fourier transform is 10 nm or less.

Abstract: A negative electrode active material includes a silicon-containing alloy having a composition represented by: SixSnyMzAa (A is unavoidable impurities, M is one or more transition metal elements, x, y, z, and a represent values of percent by mass, and 0<x<100, 0<y<100, 0<z<100, and 0?a<0.5 and x+y+z+a=100). The silicon-containing alloy has a lattice image subjected to Fourier transform processing to obtain a diffraction pattern and a size determined as an average value of maximum five major axis diameters of regions having a periodic array from a Fourier image obtained by subjecting a diffraction ring portion present in a width of from 0.7 to 1.0 when a distance between Si regular tetrahedrons is 1.0 in this diffraction pattern to inverse Fourier transform is 10 nm or less.

Abstract: A negative electrode active material includes a silicon-containing alloy represented by: SixSnyMzAa (A is unavoidable impurities, M is one or more transition metal elements, x, y, z, and a represent values of percent by mass, and 0<x<100, 0<y<100, 0<z<100, and 0?a<0.5 and x+y+z+a=100). The silicon-containing alloy has a lattice image subjected to Fourier transform processing to obtain a diffraction pattern. A distance between Si regular tetrahedrons is 0.39 nm or more when the distance between Si regular tetrahedrons in an amorphous region calculated from a Fourier image obtained by subjecting a diffraction ring portion present in a width of from 0.7 to 1.0 when a distance between Si regular tetrahedrons is 1.0 in this diffraction pattern to inverse Fourier transform is 10 nm or less.

Abstract: A negative electrode active material includes a silicon-containing alloy having a composition represented by: SixSnyMzAa (A is unavoidable impurities, M is one or more transition metal elements, x, y, z, and a represent values of percent by mass, and 0<x<100, 0<y<100, 0<z<100, and 0?a <0.5 and x+y+z+a=100). The silicon-containing alloy has a lattice image subjected to Fourier transform processing to obtain a diffraction pattern and a size determined as an average value of maximum five major axis diameters of regions having a periodic array from a Fourier image obtained by subjecting a diffraction ring portion present in a width of from 0.7 to 1.0 when a distance between Si regular tetrahedrons is 1.0 in this diffraction pattern to inverse Fourier transform is 10 nm or less.

Abstract: A bearing roller chain which is sealed by a seal mechanism which prevents entry of foreign substances from the outside and leakage of lubricating oil leakage from the inside to the outside, resulting in an improvement in wear resistance of the bearing roller and avoidance both of rotation failure of the roller and of increased traveling resistance of the chain. A seal mechanism is provided between an inner link plate of a bearing roller chain and a bearing roller assembly carried by the link plate. The bearing roller assembly is formed by a plurality of anti-friction rollers between a hollow roller and a bush. The seal mechanism comprises an inner annular oil seal member, a spacer and a disk-shaped seal member having a flange extended toward an outer side surface of the hollow roller loosely into an outer circumferential concave groove on an end surface of the hollow roller. The disk-shaped seal member slidably comes into close contact with the inner link plate and the spacer, respectively.

Abstract: A bearing roller chain which is sealed by a seal mechanism which prevents entry of foreign substances from the outside and leakage of lubricating oil leakage from the inside to the outside, resulting in an improvement in wear resistance of the bearing roller and avoidance both of rotation failure of the roller and of increased traveling resistance of the chain. A seal mechanism is provided between an inner link plate of a bearing roller chain and a bearing roller assembly carried by the link plate. The bearing roller assembly is formed by a plurality of anti-friction rollers between a hollow roller and a bush. The seal mechanism comprises an inner annular oil seal member, a spacer and a disk-shaped seal member having a flange extended toward an outer side surface of the hollow roller loosely into an outer circumferential concave groove on an end surface of the hollow roller. The disk-shaped seal member slidably comes into close contact with the inner link plate and the spacer, respectively.

Abstract: A bearing roller chain having a seal mechanism preventing entry of foreign substance from the outside, and leaking of lubricating oil leakage to the outside and the like, thereby improving wear resistance of the bearing roller and reducing both the likelihood of rotation failure and the traveling resistance of the chain. The seal mechanism is provided between an inner link plate of the chain and the hollow bearing roller, which has a plurality of internal anti-friction rollers rotatable between the hollow bearing roller and a bush mounted between opposed inner link plates. The seal mechanism encloses the internal anti-friction rollers and comprises two parts, i.e a seal ring having an annular lip portion, which comes into close contact with an outer side surface of the bearing roller and an annular metallic seal member.

Abstract: The invention provides a concrete composition used in an overlay method of construction which is used for improving a deteriorated paved surface and/or a paved layer, the concrete composition comprising a cement, a shrink-reducing agent, an expanding agent, a high performance AE water-reducing agent and an AE agent, wherein the cement is a normal portland cement and/or a low heat portland cement. The concrete composition used in an overlay method of construction is rich in the bonding strength between an existent paved layer and a new surface layer and is resistant to exfoliation, cracking of a new surface layer and wear.