公开(公告)号：DE3877652T2

公开(公告)日：1993-06-17

申请号：DE3877652

申请日：1988-08-09

Applicant: NGK INSULATORS LTD ,  MITSUBISHI MOTORS CORP

Inventor： IOKAWA HIROSHI ,  NAKAJIMA NAOHISA ,  MATSUI MINORU ,  OZAWA TADAO

IPC: F02B3/06 ,  F02B23/06 ,  F02F1/24 ,  F02F3/00 ,  F02F3/12 ,  F02F3/16 ,  F02F3/26 ,  F02F7/00

公开(公告)号：CA1235375A

公开(公告)日：1988-04-19

申请号：CA474213

申请日：1985-02-13

Applicant: NGK INSULATORS LTD

Inventor： TSUNO NOBUO ,  MATSUI MINORU

IPC: F01D5/02 ,  F16B1/00 ,  F16B4/00 ,  F02C7/00

Abstract: A turbine rotor unit and a method of producing the same are disclosed. This turbine rotor unit comprises a ceramic rotor, a ceramic shaft integrally united with the ceramic rotor and a metal shaft provided with a cylindrical portion fixing the ceramic shaft therein and is characterized by having a gap between a substantial part of the inner peripheral surface of the cylindrical portion located near the side of the ceramic rotor and the outer surface of the ceramic shaft. Further, the turbine rotor unit is produced by arranging on one end of the metal shaft a cylindrical portion wherein an inner diameter at its opening side is larger than that at the bottom side, inserting the ceramic shaft into the cylindrical potion, and fixing the ceramic shaft to the cylindrical portion at its small diameter side.

公开(公告)号：AT29052T

公开(公告)日：1987-09-15

申请号：AT83302822

申请日：1983-05-18

Applicant: NGK INSULATORS LTD

Inventor： MATSUI MINORU ,  TSUNO NOBUO

IPC: F01L1/14 ,  C04B37/02 ,  F01L7/14 ,  F02B3/06 ,  F02B23/06 ,  F02F3/00 ,  F02F3/10 ,  F02F3/12 ,  F02F3/26 ,  F02F7/00

Abstract: The disclosed engine part uses an integral combination of a ceramic member and a metallic member, which ceramic member has a metallized layer formed on one side surface thereof, and a metallic buffer is bonded to the metallized layer so as to be disposed between the ceramic member and the metallic member.

公开(公告)号：AU545642B2

公开(公告)日：1985-07-25

申请号：AU2892684

申请日：1984-06-01

Applicant: NGK INSULATORS LTD

Inventor： SOMA TAKAO ,  MATSUI MINORU

IPC: C04B35/48 ,  G01N17/00 ,  G01N25/02 ,  G01N33/38 ,  G01N25/72

Abstract: The method tests a ceramic specimen (4) containing tetragonal zirconia by heating it in an atmosphere containing water (5) for a predetermined period of time, and then conducting a test or tests of its properties. It has been found that the presence of water or water vapor, preferably water vapor in an amount of not less than 0.08 g/l more preferably not less than 2.5 g/l, at elevated temperature, preferably 50 to 1250 DEG C more preferably 150 to 500 DEG C, considerably accelerates the aging of tetragonal zirconia ceramics, so that the aging properties of the material in normal use can be predicted.

公开(公告)号：DE3578347D1

公开(公告)日：1990-07-26

申请号：DE3578347

申请日：1985-03-11

Applicant: NGK INSULATORS LTD

Inventor： MATSUI MINORU ,  TSUNO NOBUO

IPC: F02F3/00 ,  F02B23/06 ,  F02B77/11 ,  F02F3/12 ,  F02F7/00 ,  F16J1/01

Abstract: A composite internal combustion engine piston has a metal piston body 20 and a piston cap 10 constituted by a plurality of ceramic pieces 4, 5 fixed to the top portion of the metal piston body. The piston cap is composed of at least one kind of a ceramic material. To reduce the stress in the ceramic parts, at least one 4 of the ceramic pieces is fixed to the metal piston body by fitting thereto or through engagement therewith by way of a metallic piece 30 secured onto said at least one ceramic piece 4, and the remaining ceramic piece 5 or pieces are fixed onto the metal piston body by means of said at least one ceramic piece 4.

公开(公告)号：DE3571677D1

公开(公告)日：1989-08-24

申请号：DE3571677

申请日：1985-02-14

Applicant: NGK INSULATORS LTD

Inventor： TSUNO NOBUO ,  MATSUI MINORU

IPC: B23P11/00 ,  C04B37/02 ,  C21D6/02 ,  F01D5/02 ,  F01L1/14 ,  F02F7/00 ,  F16B1/00 ,  F16B4/00 ,  F01D5/00

公开(公告)号：CA1247475A

公开(公告)日：1988-12-28

申请号：CA476198

申请日：1985-03-11

Applicant: NGK INSULATORS LTD

Inventor： MATSUI MINORU ,  TSUNO NOBUO

IPC: F02F3/00 ,  F02B3/06 ,  F02B23/06 ,  F02B77/11 ,  F02F3/12 ,  F02F7/00 ,  F16J1/01

Abstract: Disclosed herein is an internal combustion engine piston comprising a piston cap constituted by plural ceramic pieces, and a metal piston body, the piston cap being fixed to the top portion of the metal piston body, wherein the piston cap is made of one or more kinds of ceramic materials, and the ceramic pieces constituting the ceramic cap and the metal piston body are bonded together through a metallized layer coated onto the ceramic pieces and a metal-plated layer coated onto the metallized layer in such a manner that the bonding area between the ceramic piece or pieces and the metal piston body may be larger at the top central portion of the metal piston body than that between the ceramic piece or pieces and the metal piston body at the other portion. Disclosed is also a method of producing the same, which comprises forming the piston cap from one or more kinds of ceramic materials, coating the surface of at least one ceramic piece which is to be faced with and bonded to the piston body with a metallized layer, coating the surface of the metallized layer with a metal plated layer, arranging the ceramic pieces in a depression formed at the top portion of the metal piston body, and bonding the piston cap and the metal piston body together through the metallized layer and the metal plated layer such that the bonding area between the ceramic piece or pieces and the metal piston body may be larger at the central top portion than at the other portion.

公开(公告)号：CA1239943A

公开(公告)日：1988-08-02

申请号：CA487531

申请日：1985-07-25

Applicant: NGK INSULATORS LTD

Inventor： MATSUI MINORU

IPC: C04B35/584 ,  C04B35/58

Abstract: A SILICON NITRIDE SINTERED BODY AND A METHOD OF PRODUCING THE SAME A highly dense Si3N4 sintered body having a substantially crystalline intergranular phase, which has an improved mechanical strength at high temperatures and excellent static fatigue properties so as to be particularly useful for high temperature structural components or parts, is produced by sintering a molded body of a blend comprising Si3N4, Y-, Mg- and Ce-compounds with a sepcified composition range.

公开(公告)号：DE3466074D1

公开(公告)日：1987-10-15

申请号：DE3466074

申请日：1984-06-15

Applicant: NGK INSULATORS LTD

Inventor： SOMA TAKAO ,  MATSUI MINORU

IPC: C04B35/48 ,  G01N17/00 ,  G01N25/02 ,  G01N33/38

Abstract: The method tests a ceramic specimen (4) containing tetragonal zirconia by heating it in an atmosphere containing water (5) for a predetermined period of time, and then conducting a test or tests of its properties. It has been found that the presence of water or water vapor, preferably water vapor in an amount of not less than 0.08 g/l more preferably not less than 2.5 g/l, at elevated temperature, preferably 50 to 1250 DEG C more preferably 150 to 500 DEG C, considerably accelerates the aging of tetragonal zirconia ceramics, so that the aging properties of the material in normal use can be predicted.

公开(公告)号：CA1207804A

公开(公告)日：1986-07-15

申请号：CA439038

申请日：1983-10-14

Applicant: NGK INSULATORS LTD

Inventor： MATSUHIRO KEIJI ,  MATSUI MINORU

IPC: C04B35/584 ,  C04B35/58

Abstract: Highly densified silicon nitride sintered bodies having excellent mechanical strength and oxidation resistance consist mainly of Si3N4 and contain Y, Mg and Zr, in which a content of Si3N4 is 95-70% by weight, a content of yttrium is 15-2% by weight calculated as Y2O3, a content of magnesium is 15-0.5% by weight calculated as MgO and a content of zirconium is 13-0.5% by weight calculated as ZrO2 and are produced by forming a mixed raw powder consisting of 95-70% by weight of silicon nitride raw powder, yttrium compound of 15-2% by weight calculated as Y2O3, magnesium compound of 15-0.5% by weight calculated as MgO and zirconium compound of 13-0.5% by weight calculated as ZrO2 into a shaped body, said yttrium compound, magnesium compound and zirconium compound being sintering aids and firing the shaped body at a temperature of 1,650-1,800.degree.C under ambient pressure of nitrogen or an inert gas atmosphere.