Kabushiki Kaisha Toshiba

Kagetaka Amano

Keizo Shimamura

Tatsuyoshi Aisaka

Masayuki Itoh

Takao Suzuki

Masaaki Tamatani

Hiromitsu Takeda

Hiromichi Horie

Hisato Kamohara

Yoshikazu Takahashi

Kohsoku Nagata

A dispersion strengthened copper alloy containing a copper matrix, and dispersion particles dispersed in the copper matrix within a range of 0.5 to 6 vol %. In this alloy, an average diameter of a matrix region where the dispersion particles are not present is 0.3 .mu.m or less, and the total amount of solid solution elements contained in the copper matrix is determined such that, when this amount of the solid solution elements is added to pure copper, the electric conductivity of the matrix is lowered by 5% IACS or less.

Dispersion strengthened copper alloy and a method of manufacturing the

This invention provides a metal-bonded tool in which iron-base alloy powder and abrasive grains are bonded to each other. The quantity of the carbon or graphite in the bond being between 2.5 wt % or more and 4.5 wt % or less of the bond, and the diameter of the precipitated carbon or graphite being 5 .mu.m or less in the bond.

Metal-bonded tool and method of manufacturing same

According to the present invention there is provided a thermal barrier coating wherein multilayers of (I) a ZrO.sub.2 layer containing a luminous activator and stabilized by Y.sub.2 O.sub.3, CaO, MgO or a mixture thereof and (II) a ZrO.sub.2 layer containing a luminous activator different from that used in (I) and stabilized by Y.sub.2 O.sub.3, CaO, MgO or a mixture thereof, or a ZrO.sub.2 layer not containing a luminous activator and stablized by Y.sub.2 O.sub.3 are stacked, and the layers at least under an uppermost layer opposite to a base member to be protected have a total thickness sufficient for exhibiting a thermal barrier effect. The present invention has as its object to provide a thermal barrier coating which allows non-destructive testing to determine whether it has a thickness sufficient for themal barrier effect.

Thermal barrier coating

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Atsugi, Japan

Kagetaka Amano