CN112458384B - Adopt polycrystal mullite fibre heat retaining discharge plasma sintering mould - Google Patents
Adopt polycrystal mullite fibre heat retaining discharge plasma sintering mould Download PDFInfo
- Publication number
- CN112458384B CN112458384B CN202011343825.5A CN202011343825A CN112458384B CN 112458384 B CN112458384 B CN 112458384B CN 202011343825 A CN202011343825 A CN 202011343825A CN 112458384 B CN112458384 B CN 112458384B
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- Prior art keywords
- mullite fiber
- polycrystalline mullite
- rotating
- rod
- plasma sintering
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- 239000000835 fiber Substances 0.000 title claims abstract description 45
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 229910052863 mullite Inorganic materials 0.000 title claims abstract description 44
- 238000005245 sintering Methods 0.000 title abstract description 13
- 230000007246 mechanism Effects 0.000 claims abstract description 19
- 238000004321 preservation Methods 0.000 claims abstract description 14
- 238000003825 pressing Methods 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 18
- 238000002490 spark plasma sintering Methods 0.000 claims description 18
- 238000009413 insulation Methods 0.000 claims description 6
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 2
- 239000000843 powder Substances 0.000 abstract description 20
- 239000002184 metal Substances 0.000 abstract description 19
- 238000003756 stirring Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 11
- 238000007599 discharging Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000005056 compaction Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 244000309464 bull Species 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
- B22F2003/1051—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding by electric discharge
Abstract
The invention discloses a discharge plasma sintering die adopting polycrystalline mullite fiber for heat preservation, which comprises an inner die fixedly arranged on an outer layer of the polycrystalline mullite fiber, wherein a plurality of supporting legs are fixedly arranged on the outer layer of the polycrystalline mullite fiber, a pressing plate is connected onto the inner die in a sliding manner, an annular groove is formed in the side wall of the inner die, a rotating ring is connected onto the annular groove in a rotating manner, a rotating mechanism is arranged on the inner die and matched with the rotating ring, two fixed blocks are fixedly arranged on the outer layer of the polycrystalline mullite fiber, connecting rods are arranged on the two fixed blocks, and a positioning mechanism is arranged between the two connecting rods and the two fixed blocks. Has the advantages that: the invention can apply a certain degree of stirring action to the metal powder placed in the inner die, so that the metal powder is more uniformly distributed in the inner die, the quality of the sintered product is improved, and the die has lower use requirement on auxiliary machinery and is convenient to move.
Description
Technical Field
The invention relates to the technical field of spark plasma sintering, in particular to a spark plasma sintering die adopting polycrystalline mullite fiber for heat preservation.
Background
The polycrystalline mullite fiber is one kind of polycrystalline alumina fiber, and may be used as heat insulating material in high temperature thermal equipment at temperature below 1600 deg.c for long period, and has high heat efficiency, saving in energy source, high production efficiency and high product quality.
Because of the properties of the polycrystalline mullite fiber, the polycrystalline mullite fiber is widely used in a spark plasma sintering process, but the uniformity of powder distribution in the existing spark plasma sintering mold cannot be guaranteed in the using process, so that the formed product is prone to defects and the product quality is affected, and the existing spark plasma sintering mold needs to be matched with a plurality of mechanical components for use, so that the mobility is poor.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a spark plasma sintering mold adopting polycrystalline mullite fiber for heat preservation.
In order to achieve the purpose, the invention adopts the following technical scheme:
a spark plasma sintering die adopting polycrystalline mullite fiber for heat preservation comprises an inner die fixedly installed on an outer layer of the polycrystalline mullite fiber, wherein a plurality of supporting legs are fixedly installed on the outer layer of the polycrystalline mullite fiber, and a pressing plate is connected to the inner die in a sliding manner;
an annular groove is formed in the side wall of the inner mold, a rotating ring is rotatably connected to the annular groove, a rotating mechanism is mounted on the inner mold, and the rotating mechanism is matched with the rotating ring;
two fixing blocks are fixedly arranged on the outer layer of the polycrystalline mullite fiber, connecting rods are arranged on the two fixing blocks, and positioning mechanisms are arranged between the two connecting rods and the two fixing blocks;
two fixed mounting has the mounting panel between the connecting rod, threaded connection has the screw rod on the mounting panel, and screw rod and clamp plate fixed connection, fixed mounting has the knob on the screw rod.
In the above discharging plasma sintering mold using polycrystalline mullite fiber for heat preservation, the rotating mechanism is composed of a mounting groove, a through hole, a driving rod, a second gear, a plurality of rotating rods and a plurality of first gears, the mounting groove is formed in the inner mold, the plurality of rotating rods are rotatably connected in the mounting groove through a bearing, each rotating rod is fixedly connected with a rotating ring, the plurality of first gears are fixedly mounted on the corresponding rotating rods respectively, the through hole is formed in the side wall of the inner mold and communicated with the mounting groove, the driving rod is rotatably connected in the through hole through the second bearing, the second gear is fixedly mounted at one end of the driving rod extending into the mounting groove, and the second gear is meshed with the first gears.
In the spark plasma sintering mold adopting the polycrystalline mullite fiber for heat preservation, a rotating plate is fixedly mounted at one end of the driving rod extending out of the inner mold, a groove matched with the rotating plate is formed in the outer layer of the polycrystalline mullite fiber, and a cross block is fixedly mounted on the rotating plate.
In the above discharging plasma sintering mold adopting polycrystalline mullite fiber for heat preservation, the upper end and the lower end of the rotating ring are fixedly provided with the sealing rings, the side wall of the annular groove is provided with two annular sealing grooves, and the two annular sealing grooves are respectively matched with the two sealing rings.
In the above discharging plasma sintering mold adopting polycrystalline mullite fiber for heat preservation, the fixing block is provided with a connecting hole matched with the connecting rod, the connecting rod is fixedly provided with the positioning block, and the length of the positioning block is greater than the width of the connecting hole.
In the above discharging plasma sintering mold using polycrystalline mullite fiber for heat preservation, two limit blocks are fixedly installed in the connecting hole, and two limit grooves matched with the corresponding limit blocks are arranged on the connecting rod.
In the above discharging plasma sintering mold adopting polycrystalline mullite fiber for heat preservation, the positioning mechanism is composed of a second round hole, an insertion rod and two first round holes, the second round hole is formed in the connecting rod, the two second round holes are symmetrically formed in the side wall of the fixing block, the two second round holes are communicated with the connecting hole, and the insertion rod is inserted between the second round hole and the two first round holes.
In the above spark plasma sintering mold using polycrystalline mullite fiber for heat preservation, the outer layer of the polycrystalline mullite fiber is uniformly provided with a plurality of temperature measuring blind holes, the pressing plate is fixedly provided with a plurality of limiting rods, the mounting plate is provided with a plurality of limiting holes, and each limiting hole is respectively matched with the corresponding limiting rod.
Compared with the prior art, the invention has the advantages that:
1: through the cooperation of rotating ring and ring channel, can exert certain stirring effect to the metal powder of placing in the centre form for metal powder distributes more evenly in the centre form, improves the product quality after the sintering.
2: through the cooperation of sealing ring and annular seal groove, can seal the operation to the ring channel, avoid rotating the problem that in-process part metal powder got into wherein at the swivel becket, ensure that metal powder can obtain the use completely, and can avoid metal powder to sinter the design in the ring channel and lead to the unable pivoted problem of swivel becket.
3: through the cooperation of rotor plate and slewing mechanism for the rotation operation of swivel ring is changeed and is gone on, has reduced the operation degree of difficulty to a certain extent.
4: through the cooperation of screw rod and mounting panel, be convenient for control the position in the mould including the clamp plate to can carry out the compaction operation to the metal powder in the centre form, need not to adopt mechanical equipment such as pneumatic cylinder, can reduce this mould to a certain extent and to auxiliary machinery's operation requirement, be convenient for remove it.
5: the design of the positioning mechanism can fix the connecting rod and the fixing block after the connecting rod and the fixing block are connected, so that the problem that the mounting plate is jacked up due to the large reaction force borne by the pressing plate in the process of compacting the metal powder by rotating the screw rod is avoided, and the smooth operation of compacting is ensured.
6: the design of temperature measurement blind hole can be used to the installation thermocouple, is convenient for detect the inside temperature of this mould to can control the inside temperature of mould according to actual conditions in sintering process, ensure its interior metal powder's sintering effect.
In conclusion, the invention can apply a certain degree of stirring effect on the metal powder placed in the inner die, so that the metal powder is more uniformly distributed in the inner die, the quality of the sintered product is improved, and the die has lower use requirement on auxiliary machinery and is convenient to move.
Drawings
FIG. 1 is a schematic structural view of a spark plasma sintering mold using polycrystalline mullite fiber for thermal insulation according to the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is an enlarged view of the structure of part A in FIG. 1;
FIG. 4 is an enlarged view of the structure of part B in FIG. 1;
fig. 5 is an enlarged view of the structure of the portion C in fig. 2.
In the figure: the structure comprises a polycrystalline mullite fiber outer layer 1, supporting legs 2, an inner die 3, a pressing plate 4, an annular groove 5, a rotating ring 6, a sealing ring 7, an annular sealing groove 8, a mounting groove 9, a bearing I10, a rotating rod 11, a gear I12, a through hole 13, a bearing II 14, a driving rod 15, a gear II 16, a rotating plate 17, a groove 18, a cross block 19, a temperature measuring blind hole 20, a fixing block 21, a connecting rod 22, a positioning block 23, a mounting plate 24, a screw rod 25, a knob 26, a limiting hole 27, a limiting rod 28, a connecting hole 29, a limiting block 30, a limiting groove 31, a round hole I32, a round hole II 33 and an inserted rod 34.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, are used in the orientations and positional relationships indicated in the drawings, which are based on the orientations and positional relationships indicated in the drawings, and are used for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Referring to fig. 1-5, the spark plasma sintering mold adopting the polycrystalline mullite fiber for heat preservation comprises an inner mold 3 fixedly installed on an outer layer 1 of the polycrystalline mullite fiber, wherein a plurality of supporting legs 2 are fixedly installed on the outer layer 1 of the polycrystalline mullite fiber, and a pressing plate 4 is connected to the inner mold 3 in a sliding manner;
the above is noteworthy:
1. a plurality of temperature measuring blind holes 20 are uniformly formed in the polycrystalline mullite fiber outer layer 1, the temperature measuring blind holes 20 can be used for installing thermocouples, and the temperature inside the die can be conveniently detected, so that the temperature inside the die can be controlled according to actual conditions, and the sintering effect of metal powder in the die is ensured.
2. Be equipped with ring channel 5 on the lateral wall of centre form 3, rotate on ring channel 5 and be connected with swivel becket 6, install slewing mechanism on the centre form 3, slewing mechanism cooperatees with swivel becket 6, and slewing mechanism comprises mounting groove 9, through-hole 13, actuating lever 15, two 16 gears, a plurality of bull stick 11 and a plurality of gear 12.
3. Sealing rings 7 are fixedly mounted at the upper end and the lower end of the rotating ring 6, two annular sealing grooves 8 are formed in the side wall of the annular groove 5, the two annular sealing grooves 8 are matched with the two sealing rings 7 respectively, the sealing rings 7 are matched with the annular sealing grooves 8, sealing operation can be performed on the annular groove 5, and the problem that part of metal powder enters the rotating ring 6 in the rotating process is avoided.
4. The mounting groove 9 is opened on the inner die 3, a plurality of rotating rods 11 are rotatably connected in the mounting groove 9 through a first bearing 10, each rotating rod 11 is fixedly connected with the rotating ring 6, a plurality of first gears 12 are respectively and fixedly mounted on the corresponding rotating rods 11, through holes 13 are opened in the side wall of the inner die 3, the through holes 13 are communicated with the mounting groove 9, driving rods 15 are rotatably connected in the through holes 13 through a second bearing 14, a second gear 16 is fixedly mounted at one end of the driving rods 15 extending into the mounting groove 9, the second gear 16 is uniformly meshed with the first gears 12, when the driving rods 15 are rotated, the meshing effect of the second gear 16 and the first gears 12 can be achieved, the rotating ring 6 can rotate in the annular groove 5, metal powder in the inner die 3 can be scattered, the metal powder can be distributed more uniformly in the inner die 3, and the quality of a sintered product can be improved.
5. A rotating plate 17 is fixedly installed at one end of the driving rod 15 extending out of the inner die 3, a groove 18 matched with the rotating plate 17 is formed in the polycrystalline mullite fiber outer layer 1, and a cross block 19 is fixedly installed on the rotating plate 17, so that the rotation condition of the driving rod 15 can be better controlled.
Two fixed blocks 21 are fixedly arranged on the polycrystalline mullite fiber outer layer 1, and connecting rods 22 are arranged on the two fixed blocks 21;
the above is noteworthy:
1. fixed mounting has mounting panel 24 between two connecting rods 22, threaded connection has screw rod 25 on mounting panel 24, and screw rod 25 and clamp plate 4 fixed connection, fixed mounting has knob 26 on the screw rod 25, through mounting panel 24 and screw rod 25's cooperation, be convenient for control the position of clamp plate 4 in interior mould 3, thereby can carry out the compaction operation to the metal powder in interior mould 3, need not to adopt mechanical equipment such as pneumatic cylinder, can reduce the operation requirement of this mould to a certain extent, be convenient for remove it.
2. A plurality of limiting rods 28 are fixedly mounted on the pressing plate 4, a plurality of limiting holes 27 are formed in the mounting plate 24, each limiting hole 27 is matched with the corresponding limiting rod 28, the moving direction of the pressing plate 4 can be limited, and the stability of the pressing plate in moving can be kept.
3. The fixing block 21 is provided with a connecting hole 29 matched with the connecting rod 22, the connecting rod 22 is fixedly provided with a positioning block 23, the length of the positioning block 23 is larger than the width of the connecting hole 29, and the position of the connecting rod 22 on the fixing block 21 can be limited by the design of the positioning block 23.
4. Two limit blocks 30 are fixedly arranged in the connecting holes 29, and two limit grooves 31 matched with the corresponding limit blocks 30 are arranged on the connecting rod 22, so that the connecting rod 22 can be stably connected on the fixing block 21.
5. Positioning mechanisms are respectively arranged between the two connecting rods 22 and the two fixing blocks 21, each positioning mechanism comprises a round hole two 33, an inserting rod 34 and two round holes one 32, the round holes two 33 are arranged on the connecting rods 22, the two round holes two 33 are symmetrically arranged on the side walls of the fixing blocks 21, the two round holes two 33 are communicated with the connecting holes 29, the inserting rods 34 are inserted between the round holes two 33 and the round holes one 32, the connecting rods 22 and the fixing blocks 21 can be fixed after being connected, the problem that the mounting plate 24 is jacked up due to large reaction force borne by the mounting plate 4 in the process that the pressing plate 4 compacts metal powder by rotating the screw 25 is avoided, the compacting operation is ensured to be carried out smoothly, and after sintering is completed, the separation operation between the connecting rods 22 and the fixing blocks 21 is convenient to carry out, so that the mounting plate 24 can be lifted to a certain degree smoothly, and the pressing plate 4 can be moved out from the inner mold 3, the metal powder adding operation is convenient.
Further, unless otherwise specifically stated or limited, the above-described fixed connection is to be understood in a broad sense, and may be, for example, welded, glued, or integrally formed as is conventional in the art.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. The spark plasma sintering die adopting the polycrystalline mullite fiber for heat preservation comprises an inner die (3) fixedly installed on an outer layer (1) of the polycrystalline mullite fiber, and is characterized in that a plurality of supporting legs (2) are fixedly installed on the outer layer (1) of the polycrystalline mullite fiber, and a pressing plate (4) is connected onto the inner die (3) in a sliding manner;
an annular groove (5) is formed in the side wall of the inner mold (3), a rotating ring (6) is rotatably connected to the annular groove (5), a rotating mechanism is mounted on the inner mold (3), and the rotating mechanism is matched with the rotating ring (6);
two fixing blocks (21) are fixedly arranged on the polycrystalline mullite fiber outer layer (1), connecting rods (22) are arranged on the two fixing blocks (21), and positioning mechanisms are arranged between the two connecting rods (22) and the two fixing blocks (21);
a mounting plate (24) is fixedly mounted between the two connecting rods (22), a screw rod (25) is connected to the mounting plate (24) in a threaded manner, the screw rod (25) is fixedly connected with the pressing plate (4), and a knob (26) is fixedly mounted on the screw rod (25);
the rotating mechanism consists of a mounting groove (9), a through hole (13), a driving rod (15), a second gear (16), a plurality of rotating rods (11) and a plurality of first gears (12), the mounting groove (9) is arranged on the inner die (3), the rotating rods (11) are rotatably connected in the mounting groove (9) through a bearing I (10), each rotating rod (11) is fixedly connected with the rotating ring (6), a plurality of first gears (12) are respectively and fixedly arranged on the corresponding rotating rods (11), the through holes (13) are arranged on the side wall of the inner mold (3), the through hole (13) is communicated with the mounting groove (9), the driving rod (15) is rotatably connected in the through hole (13) through a second bearing (14), the second gear (16) is fixedly installed at one end, extending into the installation groove (9), of the driving rod (15), and the second gear (16) is meshed with the first gears (12).
2. The spark plasma sintering mold for thermal insulation of polycrystalline mullite fiber as claimed in claim 1, wherein a rotating plate (17) is fixedly installed at one end of the driving rod (15) extending out of the inner mold (3), a groove (18) matched with the rotating plate (17) is formed in the polycrystalline mullite fiber outer layer (1), and a cross block (19) is fixedly installed on the rotating plate (17).
3. The spark plasma sintering mold adopting the polycrystalline mullite fiber for heat preservation according to claim 1, wherein the upper end and the lower end of the rotating ring (6) are both fixedly provided with a sealing ring (7), the side wall of the annular groove (5) is provided with two annular sealing grooves (8), and the two annular sealing grooves (8) are respectively matched with the two sealing rings (7).
4. The spark plasma sintering mold for thermal insulation by using polycrystalline mullite fiber as claimed in claim 1, wherein the fixing block (21) is provided with a connecting hole (29) matched with the connecting rod (22), the connecting rod (22) is fixedly provided with a positioning block (23), and the length of the positioning block (23) is greater than the width of the connecting hole (29).
5. The spark plasma sintering mold for thermal insulation of polycrystalline mullite fiber as claimed in claim 4, wherein two limit blocks (30) are fixedly installed in the connecting holes (29), and two limit grooves (31) matched with the corresponding limit blocks (30) are formed on the connecting rod (22).
6. The spark plasma sintering mold for thermal insulation of polycrystalline mullite fiber as claimed in claim 4, wherein the positioning mechanism is composed of a second circular hole (33), an insertion rod (34) and two first circular holes (32), the second circular hole (33) is formed in the connecting rod (22), the two second circular holes (33) are symmetrically formed in the side wall of the fixing block (21), the two second circular holes (33) are communicated with the connecting hole (29), and the insertion rod (34) is inserted between the second circular hole (33) and the two first circular holes (32).
7. The spark plasma sintering mold for thermal insulation of polycrystalline mullite fiber as claimed in claim 1, wherein a plurality of temperature measuring blind holes (20) are uniformly formed in the polycrystalline mullite fiber outer layer (1), a plurality of limiting rods (28) are fixedly mounted on the pressing plate (4), a plurality of limiting holes (27) are formed in the mounting plate (24), and each limiting hole (27) is respectively matched with a corresponding limiting rod (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011343825.5A CN112458384B (en) | 2020-11-25 | 2020-11-25 | Adopt polycrystal mullite fibre heat retaining discharge plasma sintering mould |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011343825.5A CN112458384B (en) | 2020-11-25 | 2020-11-25 | Adopt polycrystal mullite fibre heat retaining discharge plasma sintering mould |
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| CN112458384A CN112458384A (en) | 2021-03-09 |
| CN112458384B true CN112458384B (en) | 2022-08-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114054754A (en) * | 2021-11-09 | 2022-02-18 | 宁波新睦科技有限公司 | A spark plasma sintering system for powder metallurgy |
| CN115383113B (en) * | 2022-09-13 | 2023-08-25 | 中铁隆昌铁路器材有限公司 | Pressureless sintering tool and sintering method for powder metallurgy brake pad friction body assembly |
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