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1. 发明专利

JPH05321603A CERAMIC ROTOR BLADE 失效
公开(公告)号：JPH05321603A
公开(公告)日：1993-12-07
申请号：JP13216392
申请日：1992-05-25
申请人： HITACHI LTD , TOKYO ELECTRIC POWER CO , ASAHI GLASS CO LTD
发明人： MACHIDA TAKASHI , MIYATA HIROSHI , FURUSE YUTAKA , TERAMAE TETSUO , TORIYAMA AKIRA , TAKESA KAZUHIKO
IPC分类号： F01D5/28 , F01D5/30
摘要： PURPOSE:To enhance the reliability of a rotor blade by fitting a ceramic blade having a dove-tail shape root part, in a metal disc or a shank, and by lowering the rigidity of end parts of a pad so as to restrain stress concentration in the contact end parts. CONSTITUTION:Each of pads 3 intervening between a ceramic blade 1 and a shank 2 is thinned around its contact end parts. Accordingly, the rigidity of opposite end parts of the pad 3 which are contact end parts lowers and according the contact end parts of the pad 3 does not become a part where a significant stress point exists even though a centrifugal force is applied to the ceramic blade 1 during nominal operation so as to avoid damaging the blade. Instead of thinning the end parts of the pad, grooves may be formed in the end parts of the pad, or only the end parts of the pad may be made of materials having a low rigidity.

2. 发明专利

DE69014793T2 未知
公开(公告)号：DE69014793T2
公开(公告)日：1995-06-14
申请号：DE69014793
申请日：1990-09-14
申请人： NGK INSULATORS LTD , TOKYO ELECTRIC POWER CO
发明人： FURUSE YUTAKA , MATSUHIRO KEIJI
IPC分类号： C04B35/645 , C04B35/80 , C04B35/64
摘要： A sintered ceramic composite body is manufactured by preparing a powdery mixture composed of a base material composed of either one of oxide ceramic such as alumina, mullite, magnesia, or the like, and nonoxide ceramic such as silicon nitride, sialon, or the like, and a reinforcement material composed of particles or platelet particles of silicon carbide which have a size ranging from 5 to 20 mu m, the particles of silicon carbide being contained at a volume ratio ranging from 3 to 50 %. The platelet particles have a maximum diameter ranging from 5 to 50 mu m and a thickness which is 1/3 or less of the maximum diameter. The powdery mixture is molded into a shaped product, which is then sintered in a temperature range from 1,400 to 1,900 DEG C for the base material which is composed of oxide ceramic or in a temperature range from 1,500 to 2,000 DEG C for the base material which is composed of nonoxide ceramic. The body has high toughness.

3. 发明专利

DE69213802T2 未知
公开(公告)号：DE69213802T2
公开(公告)日：1997-02-27
申请号：DE69213802
申请日：1992-04-08
申请人： NGK INSULATORS LTD , TOKYO ELECTRIC POWER CO
发明人： FURUSE YUTAKA , ENDO YASUYUKI , KOBAYASHI HIROMICHI , SAKAI HIROAKI , OHI HIROYUKI
IPC分类号： C04B41/50 , C04B41/87 , C23C4/10 , F01D5/28

4. 发明专利

DE69213802D1 未知
公开(公告)号：DE69213802D1
公开(公告)日：1996-10-24
申请号：DE69213802
申请日：1992-04-08
申请人： NGK INSULATORS LTD , TOKYO ELECTRIC POWER CO
发明人： FURUSE YUTAKA , ENDO YASUYUKI , KOBAYASHI HIROMICHI , SAKAI HIROAKI , OHI HIROYUKI
IPC分类号： C04B41/50 , C04B41/87 , C23C4/10 , F01D5/28

5. 发明专利

DE69011447T2 未知
公开(公告)号：DE69011447T2
公开(公告)日：1995-02-23
申请号：DE69011447
申请日：1990-09-14
申请人： NGK INSULATORS LTD , TOKYO ELECTRIC POWER CO
发明人： FURUSE YUTAKA , MATSUHIRO KEIJI
IPC分类号： C04B35/645 , C04B35/80 , C04B35/64
摘要： A sintered ceramic composite body is manufactured by preparing a powdery mixture composed of a base material composed of either one of oxide ceramic such as alumina, mullite, magnesia, or the like, and nonoxide ceramic such as silicon nitride, sialon, or the like, and a reinforcement material composed of particles of silicon carbide which have a size of 1 mu m or less and a size ranging from 5 to 20 mu m, or have a size of 1 mu m or less and platelet silicon carbide particles having a maximum diameter ranging from 5 to 50 mu m and a thickness which is 1/3 or less of the maximum diameter, the particles of silicon carbide being contained at a volume ratio ranging from 10 to 50 %. The powdery mixture is molded into a shaped product, which is then sintered in a temperature range from 1,400 to 1,900 DEG C for the base material which is composed of oxide ceramic or in a temperature range from 1,500 to 2,000 DEG C for the base material which is composed of nonoxide ceramic. The body has high toughness.

6. 发明专利

DE69014793D1 未知
公开(公告)号：DE69014793D1
公开(公告)日：1995-01-19
申请号：DE69014793
申请日：1990-09-14
申请人： NGK INSULATORS LTD , TOKYO ELECTRIC POWER CO
发明人： FURUSE YUTAKA , MATSUHIRO KEIJI
IPC分类号： C04B35/645 , C04B35/80 , C04B35/64
摘要： A sintered ceramic composite body is manufactured by preparing a powdery mixture composed of a base material composed of either one of oxide ceramic such as alumina, mullite, magnesia, or the like, and nonoxide ceramic such as silicon nitride, sialon, or the like, and a reinforcement material composed of particles or platelet particles of silicon carbide which have a size ranging from 5 to 20 mu m, the particles of silicon carbide being contained at a volume ratio ranging from 3 to 50 %. The platelet particles have a maximum diameter ranging from 5 to 50 mu m and a thickness which is 1/3 or less of the maximum diameter. The powdery mixture is molded into a shaped product, which is then sintered in a temperature range from 1,400 to 1,900 DEG C for the base material which is composed of oxide ceramic or in a temperature range from 1,500 to 2,000 DEG C for the base material which is composed of nonoxide ceramic. The body has high toughness.

7. 发明专利

DE69011447D1 未知
公开(公告)号：DE69011447D1
公开(公告)日：1994-09-15
申请号：DE69011447
申请日：1990-09-14
申请人： NGK INSULATORS LTD , TOKYO ELECTRIC POWER CO
发明人： FURUSE YUTAKA , MATSUHIRO KEIJI
IPC分类号： C04B35/645 , C04B35/80 , C04B35/64
摘要： A sintered ceramic composite body is manufactured by preparing a powdery mixture composed of a base material composed of either one of oxide ceramic such as alumina, mullite, magnesia, or the like, and nonoxide ceramic such as silicon nitride, sialon, or the like, and a reinforcement material composed of particles of silicon carbide which have a size of 1 mu m or less and a size ranging from 5 to 20 mu m, or have a size of 1 mu m or less and platelet silicon carbide particles having a maximum diameter ranging from 5 to 50 mu m and a thickness which is 1/3 or less of the maximum diameter, the particles of silicon carbide being contained at a volume ratio ranging from 10 to 50 %. The powdery mixture is molded into a shaped product, which is then sintered in a temperature range from 1,400 to 1,900 DEG C for the base material which is composed of oxide ceramic or in a temperature range from 1,500 to 2,000 DEG C for the base material which is composed of nonoxide ceramic. The body has high toughness.

8. 发明专利

JPH0979002A CERAMIC BUCKET AND BUCKET ENGAGING PART 失效
公开(公告)号：JPH0979002A
公开(公告)日：1997-03-25
申请号：JP23498595
申请日：1995-09-13
申请人： HITACHI LTD , TOKYO ELECTRIC POWER CO
发明人： MACHIDA TAKASHI , NAKAYAMA MASATO , FURUSE YUTAKA , IYOGI TAKESHI
IPC分类号： F01D5/14 , F01D5/28 , F01D5/30
摘要： PROBLEM TO BE SOLVED: To reduce centrifugal force applied onto a ceramic bucket, and improve reliability of centrifugal force resistance. SOLUTION: In a ceramic bucket 1 provided with a blade part 2 on which centrifugal force is applied, a platform 7 arranged on the blade part 2, and a blade root part 10 which is extendedly arranged on the platform 7, the width of the platform 7 is formed smaller than that of the pitch (p) between adjacent blade parts of the ceramic bucket arranged on a metal rotor 17 in which the ceramic bucket 1 is arranged. The surface of the metal rotor 17 which is not covered with the platform 7 is formed as a bucket engaging part on which a heat resistance coating 27 is applied. In the ceramic bucket 1 which not have the platform 7 and the bucket engaging part, the cross sectional part of the blade root part 10 and the metal rotor 17 or the engaging groove of a metal shank is formed in a cross sectional shape which is similar to a blade sectional surface.

9. 发明专利

DE3603331A1 未知
公开(公告)号：DE3603331A1
公开(公告)日：1986-08-07
申请号：DE3603331
申请日：1986-02-04
申请人： ASAHI GLASS CO LTD
发明人： KAGEYAMA NOBUO , SUZUKI KEIICHIRO , FURUSE YUTAKA
IPC分类号： C04B35/565 , C04B35/575 , C04B35/56 , C04B35/64 , F27D1/00

10. 发明专利

GB2170516A Silicon carbide sintered article and process for its production 未知
公开(公告)号：GB2170516A
公开(公告)日：1986-08-06
申请号：GB8602114
申请日：1986-01-29
申请人： ASAHI GLASS CO LTD
发明人： KAGEYAMA NOBUO , SUZUKI KEIICHIRO , FURUSE YUTAKA
IPC分类号： C04B35/565 , C04B35/575 , B22F3/00 , C22C29/00
摘要： A silicon carbide sintered article consisting essentially of silicon carbide; from 0.5 to 35% by weight, as calculated as Al relative to the silicon carbide, of Al and/or a refractory Al compound; and from 2 to 99% by weight, relative to the silicon carbide, of at least one boride selected from borides of elements belonging to Groups 4A, 5A and 6A in the 4th, 5th and 6th periods of the periodic table, wherein at least a half amount of silicon carbide grains is constituted by elongated and/or plate-like silicon carbide grains.

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