Mitsubishi Materials Corporation

Mitsubishi Kinzoku Kabushiki Kaisha

Mitsubishi Metal Corporation

Mitsubishi Materials Electronic Chemicals Co., Ltd.

Asahi Glass Company, Limited

Mitsubishi Jidosha Kogyo Kabushiki Kaisha

Asahi Fiber Glass Company, Limited

Saburo Wakita

Akira Mitsuhashi

Yoshinobu Nakada

Jun-ichi Sasaki

Junji Hoshi

Junichi Sasaki

Yuji Ishiwari

Hiroshi Ikeda

Yuhji Ishiwari

Kensho Sahira

Takanori Matsui

Toshio Yonezawa

Ritsue Yabuki

Junya Ohe

Kiichi Yamatsuta

Katsuo Sugahara

Yukinori Kutsukake

Hideo Kitamura

Tsutomu Takahashi

Yoshio Takizawa

Shoji Goto

Tsutomu Oka

Kouji Tsuzukihashi

Osami Noguchi

Akihiko Sakonooka

Masuo Sugizaki

Juji Hoshi

Atsuo Yanagimachi

Kiyoshi Yamaguchi

Koji Tsuzukihashi

Norio Yanagisawa

Shinich Miyamoto

Hideo Kawabata

Masahiro Kanai

Toshiyuki Shimamura

Koji Toyokura

A method for manufacturing a polycrystalline silicon ingot includes unidirectionally solidifying a molten silicon upwardly from the bottom of a crucible, wherein the crucible is provided with silica deposited on the bottom of the crusible; and then dividing the degree of solidification in the crucible into a first zone from 0 mm to X in height (10 mm&#x2266;X&#x3c;30 mm), a second zone from X to Y in height (30 mm&#x2266;Y&#x3c;100 mm) and a third zone of Y or more in height, based on the bottom of the crucible, wherein a solidification rate V1 in the first zone is set in the range of 10 mm/h&#x2266;V1&#x2266;20 mm/h and a solidification rate V2 in the second zone is set in the range of 1 mm/h&#x2266;V2&#x2266;5 mm/h.

Method for manufacturing polycrystalline silicon ingot, and polycrystalline silicon ingot

This metallic silicon is manufactured by refining molten crude metallic silicon by unidirectional solidification, and has a purity of 3N or more to 6N or less and an average crystal grain diameter of 1 mm or more. This method for manufacturing the metallic silicon includes: solidifying molten crude metallic silicon in a mold which contains fine silica particles in an inner peripheral layer thereof by unidirectional solidification at a rate of 1 mm/min or less; and then cooling to 200&#xb0; C. or below at a rate of 2&#xb0; C./min or less.

Metallic silicon and method for manufacturing the same

A mold for producing a silicon ingot having a layered structure comprising an inner silica layer containing at least one layer in which a fused silica powder with a particle size of 100 &mgr;m or less and a fine fused silica sand with a particle size of 100-300 &mgr;m is bonded with a silica binder, and an outer silica layer containing at least one layer in which a fused silica powder with a particle size of 100 &mgr;m or less and a coarse fused silica sand with a particle size of 500-1500 &mgr;m is bonded with a silica binder.

Mold for producing silicon ingot and method for fabricating the same

A simple and inexpensive method and apparatus for producing crystalline silicon comprising the steps of melting silicon in a mold, then cooling the bottom of the mold is cooled to create a positive temperature gradient from the bottom of the mold upward, thereby causing the molten silicon to crystallize from the inner bottom of the mold upward so that the solid-liquid phase boundary, separating the crystallized silicon from the molten silicon, moves upward as the molten silicon crystallizes. As the silicon crystallizes, an inert gas is blown onto the surface of the molten silicon from a position above the surface of the molten silicon, thereby vibrating the surface of the molten silicon in such a manner that cavities are formed in the surface of the molten silicon.

Method for producing crystalline silicon

A method for producing a silicon ingot having a directional solidification structure comprising the steps of: placing a silicon raw material into a crucible of a melting device constructed by mounting a chill plate on an underfloor heater, mounting a crucible with a large cross-sectional area on the chill plate, providing an overhead heater over the crucible, and surrounding the circumference of the crucible with a heat insulator; heat-melting the silicon raw material by flowing an electric current through the underfloor heater and overhead heater; chilling the bottom of the crucible by halting the electric current through the underfloor heater after the silicon raw material has been completely melted to form a molten silicon; chilling the bottom of the crucible by flowing an inert gas through the chill plate; and intermittently or continuously lowering the temperature of the overhead heater by intermittently or continuously decreasing the electric current through the overhead heater, and an apparatus for producing the silicon ingot.

Method for producing silicon ingot having directional solidification structure and apparatus for producing the same

The present invention relates to a superior Fe--Cr alloy and a nozzle for diesel engines formed from this Fe--Cr alloy. The Fe--Cr alloy of the present invention comprises:

FE-CR alloy and nozzle for diesel engines

A nickel-based alloy which is excellent not only in anti-corrosion properties but also in workability is disclosed. The alloy contains 15 to 35 weight % of chromium; 6 to 24 weight % of molybdenum; wherein the sum of chromium plus molybdenum is no greater than 43 weight %; 1.1 to 8 weight % of tantalum; and balance nickel and unavoidable impurities. The alloy may optionally include no greater than 0.1 weight % of nitrogen; no greater than 0.3 weight % of magnesium, no greater than 3 weight % of manganese, no greater than 0.3 weight % of silicon, no greater than 0.1 weight % of carbon, no greater than 6 weight % of iron, no greater than 0.1 weight % of zirconium, no greater than 0.01 weight % of calcium, no greater than 1 weight % of niobium, no greater than 4 weight % of tungsten, no greater than 4 weight % of copper, no greater than 0.8 weight % of titanium, no greater than 0.8 weight % of aluminum, no greater than 5 weight % of cobalt, no greater than 0.5 weight % of vanadium, no greater than 2 weight % of hafnium, no greater than 3 weight % of rhenium, no greater than 1 weight % of osmium, no greater than 1 weight % of platinum, no greater than 1 weight % of ruthenium, no greater than 1 weight % of palladium, no greater than 0.1 weight % of lanthanum, no greater than 0.1 weight % of cerium, or no greater than 0.1 weight % of yttrium.

Nickel-based alloy with chromium, molybdenum and tantalum

A coated valve face of an engine valve is formed of an Fe-based alloy having a composition consisting essentially of, by weight, 0.7 to 1.5% of C, 10 to 15% of Mn, 24 to 30% of Cr, 6.1 to 9.8% of Mo, 10 to 15% of Ni, 0.1 to 0.4% of N, 0.2 to 1.5% of Si, and optionally at least one of 0.1 to 5% of Nb, 0.1 to 5% of Ta and 0.15% of W as required (the total content of Nb, Ta and W being limited to 5% or less), and the balance substantially Fe and inevitable impurities, and having a two-phase structure formed of an austenitic phase and an eutectic carbide phase. In another embodiment, the composition contains between 0.05 to 1% Co. The Fe-based alloys are preferably applied to the valve face by plasma beam or laser beam coating of powdered such alloys onto the valve face.

Engine valve having improved high-temperature wear resistance

A Co-based alloy exhibits superior high-temperature strength and resistance properties. In one embodiment, the Co-based alloy contains, in weight percent, from about 0.1 to about 1.2 of C; from about 0.01 to about 2 of at least one of Si and Mn; from about 22 to about 37 of Cr; from about 5 to about 15 of Ni; from about 0.1 to about 3.5 of Re; with a balance being Co and incidental impurities. Co and C, Si, Mn, Cr, Ni, Re, B, Zr, W, Mo, Ta, and Nb impart high-temperature wear resistance to the alloy to withstand repeated temperature cycling in a glass spinnaret. In one embodiment of the present invention, Hf is added to improve molten glass corrosion resistance, while Y and other rare earth elements are added in alternate embodiments to improve high-temperature oxidation resistance. Percentages by weight are disclosed for enhanced high-temperature oxidation resistance, increased fluid wear resistance and enhanced molten glass corrosion resistance.

Enhanced Co-based alloy

A precipitation strengthening type nickel base single crystal alloy, which consists essentially of, on a weight percent basis,

Precipitation hardening nickel base single crystal cast alloy

Magnetic core material made of Fe-Co base alloy for high frequencies

In a method of manufacturing a golf club head, at least a part of the golf club head is integrally precision-cast in titanium or an alloy thereof. The golf club head has a hollow section and a sole face provided therein with an opening communicating with the hollow section. A sole closure is manufactured by means of pressing. The sole closure is in agreement in dimension with the opening and is made of titanium or an alloy thereof. The sole closure made of the titanium or the alloy thereof is mounted to the opening in the golf club head in a sealed manner.

Method of manufacturing golf club head

Growing community of inventors

Omiya, Japan

Saburo Wakita