GB1470949A - Method of making a duo-density silicon nitride article - Google Patents
Method of making a duo-density silicon nitride articleInfo
- Publication number
- GB1470949A GB1470949A GB912176A GB912176A GB1470949A GB 1470949 A GB1470949 A GB 1470949A GB 912176 A GB912176 A GB 912176A GB 912176 A GB912176 A GB 912176A GB 1470949 A GB1470949 A GB 1470949A
- Authority
- GB
- United Kingdom
- Prior art keywords
- blade ring
- silicon nitride
- die
- bonding surface
- rotor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229910052581 Si3N4 Inorganic materials 0.000 title abstract 6
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 title abstract 6
- 238000004519 manufacturing process Methods 0.000 title 1
- 239000000203 mixture Substances 0.000 abstract 2
- 238000003825 pressing Methods 0.000 abstract 2
- 229910052582 BN Inorganic materials 0.000 abstract 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 238000000280 densification Methods 0.000 abstract 1
- 239000008393 encapsulating agent Substances 0.000 abstract 1
- 238000001746 injection moulding Methods 0.000 abstract 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 abstract 1
- 239000000395 magnesium oxide Substances 0.000 abstract 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 abstract 1
- 238000005121 nitriding Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 239000011856 silicon-based particle Substances 0.000 abstract 1
- 238000007569 slipcasting Methods 0.000 abstract 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/34—Rotor-blade aggregates of unitary construction, e.g. formed of sheet laminae
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
- C04B35/584—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride
- C04B35/591—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride obtained by reaction sintering
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
- C04B35/584—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride
- C04B35/593—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride obtained by pressure sintering
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Ceramic Products (AREA)
- Laminated Bodies (AREA)
Abstract
1470949 Silicon nitride gas turbine rotor FORD MOTOR CO Ltd 8 March 1976 [25 April 1975] 09121/76 Heading F1T [Also in Divisions B5 and C1] A silicon nitride rotor for a gas turbine engine having a hub of density greater than the blades is manufactured by making a blade ring 10 of silicon particles in a forming operation, nitriding the blade ring to convert it to substantially pure silicon nitride; coating all but a bonding surface 16 of the blade ring with a release agent, boron nitride specified, and then encapsulating all but the bonding surface of the blade ring with silicon nitride 18, 20 to form a die member; placing the die member in a pressing die structure 22 so that the bonding surface of the blade ring forms a portion of the surface of a die volume formed by the pressing die structure; filling the die volume with a mixture 42 of from 94 to 99.5 wt. per cent silicon nitride particles and from 6.0 to 0.5 wt. per cent of a densification aid, magnesium oxide specified; compacting the mixture under the simultaneous application of heat and pressure to at least 98% of theoretical density thereby forming the hub 44 bonded to the blade ring along the blade ring's bonding surface; and removing the pressed structure from the die and the encapsulant from the blade ring to obtain the complete rotor. The first element may be made by either a slip casting operation or by an injection moulding process.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US57189775A | 1975-04-25 | 1975-04-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1470949A true GB1470949A (en) | 1977-04-21 |
Family
ID=24285500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB912176A Expired GB1470949A (en) | 1975-04-25 | 1976-03-08 | Method of making a duo-density silicon nitride article |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS51129899A (en) |
| CA (1) | CA1079935A (en) |
| DE (1) | DE2617336C2 (en) |
| GB (1) | GB1470949A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005007326A2 (en) | 2003-07-11 | 2005-01-27 | Mtu Aero Engines Gmbh | Method for making gas turbine elements and corresponding element |
| CN117645487A (en) * | 2023-10-27 | 2024-03-05 | 航天特种材料及工艺技术研究所 | Preparation method of variable-density silicon nitride ceramic component |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4127684A (en) * | 1977-12-23 | 1978-11-28 | Ford Motor Company | Crack protection method |
| DE3337025A1 (en) * | 1983-10-12 | 1985-05-02 | Feldmühle AG, 4000 Düsseldorf | METHOD FOR PRODUCING A SILICON NITRIDE COMPONENT |
| SE456322B (en) * | 1986-03-04 | 1988-09-26 | Asea Stal Ab | SET FOR MANUFACTURE OF METAL PRODUCTS THROUGH HEATISOSTAT COMPRESSION OF POWDER USING CORE |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB779474A (en) * | 1954-07-29 | 1957-07-24 | Union Carbide Ltd | Method of preparing silicon nitride articles by slip casting |
| DE2135648A1 (en) * | 1971-07-16 | 1973-01-25 | Lucas Industries Ltd | Silicon nitride - assembly of two blocks |
-
1976
- 1976-01-30 CA CA244,845A patent/CA1079935A/en not_active Expired
- 1976-03-08 GB GB912176A patent/GB1470949A/en not_active Expired
- 1976-04-16 JP JP51042617A patent/JPS51129899A/en active Pending
- 1976-04-21 DE DE19762617336 patent/DE2617336C2/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005007326A2 (en) | 2003-07-11 | 2005-01-27 | Mtu Aero Engines Gmbh | Method for making gas turbine elements and corresponding element |
| WO2005007326A3 (en) * | 2003-07-11 | 2005-06-16 | Mtu Aero Engines Gmbh | Method for making gas turbine elements and corresponding element |
| CN117645487A (en) * | 2023-10-27 | 2024-03-05 | 航天特种材料及工艺技术研究所 | Preparation method of variable-density silicon nitride ceramic component |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2617336A1 (en) | 1976-11-04 |
| JPS51129899A (en) | 1976-11-11 |
| DE2617336C2 (en) | 1983-04-14 |
| CA1079935A (en) | 1980-06-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| 746 | Register noted 'licences of right' (sect. 46/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |