Kabushiki Kaisha Toshiba

Toshiba Materials Co., Ltd.

Takashi Rokutanda

Tomohisa Arai

Tadaharu Kido

Masaki Toyoshima

Takao Kusaka

Takashi Hino

Michio Sato

Yoshitaka Adachi

Kazumitsu Morimoto

Akihisa Saito

Eiji Oyaizu

Masashi Nakatani

Nobuyoshi Jimbo

To suppress a decrease in optical output of a scintillator. A scintillator includes a sintered body of 1 mmor less that contains a rare earth oxysulfide. In a composition image obtained by observing a cross-section of the sintered body under a scanning electron microscope, the sum of the number of oxide regions that contain at least one of a rare earth oxide different from the rare earth oxysulfide and an impurity metal oxide and the number of sulfide regions that contain at least one of a rare earth sulfide different from the rare earth oxysulfide and an impurity metal sulfide, which exist in a unit area of 500 &#x3bc;m&#xd7;500 &#x3bc;m, is zero or more and five or less. Each of the oxide regions and the sulfide regions has a major axis of zero or more and 100 &#x3bc;m or less.

Scintillator, scintillator array, radiation detector, and radiation examination device

The present invention provides a plasma etching apparatus componentincludes a base materialand an yttrium oxide coatingformed by an impact sintering process and configured to cover a surface of the base material. The yttrium oxide coatingcontains at least one of particulate portions and non-particulate portions. The yttrium oxide coatinghas a film thickness of 10 &#x3bc;m or above and a film density of 90% or above. The particulate portions have an area coverage ratio of 0 to 80% and the non-particulate portions have an area coverage ratio of 20 to 100%.

Plasma etching apparatus component and manufacturing method for the same

There are provided a high hardness, high corrosion resistance and high wear resistance alloy, wherein the alloy is an aging heat treated Cr(chromium)-Al(aluminum)-Ni(nickel)-base alloy, the proportion of a mixed phase of (&#x3b1; phase+&#x3b3;' phase+&#x3b3; phase) precipitated at grain boundaries of &#x3b3; phase grains in a metal structure in the cross section of the alloy is not less than 95% in terms of area ratio, and the intensity ratio as measured by X-ray diffractometry of the alloy is not less than 50% and not more than 200% in terms of I&#x3b1;(110)/[I&#x3b3;(200)+I&#x3b3;&#x2032;(004)]&#xd7;100, and a component comprising this alloy, a material for an alloy which can form this alloy, and a process for producing this alloy. The present invention can provide a Cr&#x2014;Al&#x2014;Ni-base alloy possessing excellent corrosion resistance, hardness, wear resistance, releasability, fatigue strength, and planishing property in a molding face, a component comprising this alloy, a material for an alloy which can form this alloy, and a process for producing this alloy.

High hardness, high corrosion resistance and high wear resistance alloy

A cutter is composed of a Ni&#x2014;Cr alloy containing from 32 to 44 mass percent of Cr, from 2.3 to 6.0 mass percent of Al, the balance being Ni, impurities, and additional trace elements and having a Rockwell C hardness of 52 or more. This Ni&#x2014;Cr alloy provides a cutter produced with a superior workability and by a significantly simplified process, having a low deterioration in the hardness even when heated in use, having excellent corrosion resistance and low-temperature embrittlement resistance, and satisfactorily maintaining the cutting performance for a long time.

Cutter composed of Ni-Cr alloy

A cutter is composed of a Ni&#x2014;Cr&#x2014;Al alloy containing from 32 to 44 mass percent of Cr, from 2.3 to 6.0 mass percent of Al, the balance being Ni, impurities, and additional trace elements and having a Rockwell C hardness of 52 or more. This Ni&#x2014;Cr&#x2014;Al alloy provides a cutter produced with a superior workability and by a significantly simplified process, having a low deterioration in the hardness even when heated in use, having excellent corrosion resistance and low-temperature embrittlement resistance, and satisfactorily maintaining the cutting performance for a long time.

Cutter composed of Ni-Cr-Al Alloy

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Yokohama, Japan

Takashi Rokutanda