CN202224653U - Graphite die for sintering gradient material - Google Patents
Graphite die for sintering gradient material Download PDFInfo
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- CN202224653U CN202224653U CN2011203804266U CN201120380426U CN202224653U CN 202224653 U CN202224653 U CN 202224653U CN 2011203804266 U CN2011203804266 U CN 2011203804266U CN 201120380426 U CN201120380426 U CN 201120380426U CN 202224653 U CN202224653 U CN 202224653U
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- die
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- liner
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Abstract
The utility model relates to a graphite die for sintering a gradient material. The graphite die for sintering the gradient material comprises a female die, a liner, a male die upper pressing head, a male die lower pressing head, a thermocouple and powder to be sintered, wherein the female die has a three-section integrated structure; the three sections are cylindrical, truncated cone-shaped and cylindrical sequentially from top to bottom; a radial temperature-measuring hole is formed in the outer wall of the truncated cone and is positioned in the midpoint position of the axial dimension of the truncated cone; a conical through hole is formed in the female die; the liner has a conical structure matched with the conical through hole of the female die; after the powder to be sintered is placed in the liner, two ends of the liner are sealed by the male die upper pressing head and the male die lower pressing head; and the axial temperature gradient in the die can be adjusted by adjusting the included angel of the generatrix of the truncated cone and the horizontal plane. Stable axial temperature gradient can be generated by adopting the graphite die to sinter; and the radial temperature gradient in the powder to be sintered is small, so the sintering pressure is high and the die is difficult to damage.
Description
Technical field
The utility model relates to a kind of graphite jig, is specifically related to a kind of graphite jig that is used for the functionally gradient material (FGM) sintering.
Background technology
FGM is that a kind of composition and performance are at the continuous or accurate continually varying heterogeneous body of a certain direction of material composite.(Spark Plasma Sintering SPS) is the novel Fast Sintering technology that the material sintering is realized in a kind of temperature field that utilizes the electric current Joule effect to produce to discharge plasma sintering technique.Employed mould when using at present plasma discharging technology sintering to prepare FGM comprises die and two columniform punch of hollow cylindrical.When using this traditional moulds to prepare FGM, the temperature field axial distribution is even in the mould.Yet because the axial composition of sample consists of graded, the axial temperature field of homogeneous is not suitable for the sintering of sample, can not make each layer of functionally gradient material (FGM) sintering under optimal sintering temperature.
The utility model content
The utility model provides a kind of graphite jig that is used for the functionally gradient material (FGM) sintering, uses this graphite jig to produce stable axial-temperature gradient at mould inside, is applicable to the sintering preparation of functionally gradient material (FGM).
A kind of graphite jig that is used for the functionally gradient material (FGM) sintering comprises die, liner, punch seaming chuck, punch push-down head, thermocouple and powder to be sintered, and wherein: the profile of die is the syllogic overall structure; Be followed successively by cylindrical, truncated cone and cylindrical from top to bottom, be called cylinder, the frustum of a cone and following cylinder respectively, the diameter of last cylinder is less than the small end of the frustum of a cone; The outside diameter of the frustum of a cone is identical with following cylinder; On the outer wall of the frustum of a cone, have thermometer hole radially, thermometer hole is positioned at the point midway of frustum of a cone axial dimension, and the inside of die is conical through-hole; The conical through-hole small end is positioned at cylinder, and big end is positioned at cylinder down; The pyramidal structure of liner for matching with the die conical through-hole; Place powder to be sintered in the liner; Punch seaming chuck and punch push-down head are cylindrical, and the height of cylinder is consistent on punch seaming chuck and the die, adopts this kind design can guarantee that powder to be sintered is in the axial temperature gradient field; The height of cylinder is 20～30mm on the die, and wall thickness is 8～12mm, adopts this kind design can reduce the inner radial symmetry gradient of powder to be sintered, thereby guarantees each layer powder sintering under the temperature field of homogeneous; Cylinder and frustum of a cone junction are step surface on the die, and the width of step surface is 8～12mm, the structure of step surface guarantee sample can be under higher axial compressive force sintering and do not damage graphite jig; The scope of frustum of a cone bus and horizontal plane angle is 30 ° to 60 °, realizes the adjusting of axial-temperature gradient size in the mould through the size of regulating frustum of a cone bus and horizontal plane angle; The liner wall thickness is 2～3mm, and the tapering of outer wall is consistent with the conical through-hole in the die.
The course of work and principle: before the sintering, earlier die is turned upside down, liner is packed in the conical through-hole of die, then with pack into the upper end of liner of punch seaming chuck, the required powder to be sintered of sintering functionally gradient material (FGM) of in the liner cavity, packing into successively; With pack into the lower end of liner of push-down head, put upside down mould more then, make seaming chuck vertically last; The aspect ratio inside liner of the die frustum of a cone is loaded the high 5～10mm of height of powder to be sintered; Thereby it is corresponding with the thermometer hole position to guarantee that powder to be sintered is in axial temperature gradient field middle section position interior and the sintering powder; The relative position that guarantees liner and die simultaneously is constant, carries out sintering under definite temperature field thereby powder to be sintered is in; Temperature when in the thermometer hole of die, inserting the thermocouple measurement sintering can be carried out sintering in discharging plasma sintering equipment.When carrying out discharge plasma sintering, because electric current the density skewness of electric current can occur in the frustum of a cone of die part, the closeer part of electric current can produce more Joule heat, thus in the frustum of a cone part of die the generation axial-temperature gradient.
Beneficial effect: adopt the graphite jig of the utility model to carry out sintering, can produce stable axial-temperature gradient, and powder inner radial thermograde to be sintered is little, sintering pressure is big, and mould is not easy to damage.
Description of drawings
Fig. 1 is the structural representation of the utility model die.
Fig. 2 is the structural representation of the utility model liner.
Wherein: the last cylinder of 1-, the 2-frustum of a cone, cylinder, 4-liner, 5-punch seaming chuck, 6-punch push-down head, 7-thermometer hole under the 3-.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is explained further details.
As attach shown in Fig. 1 and 2, a kind of graphite jig that is used for the functionally gradient material (FGM) sintering of the utility model comprises die, liner 4, punch seaming chuck 5, punch push-down head 6, thermocouple and powder to be sintered; Wherein: the profile of die is the syllogic overall structure; Be followed successively by cylindrical, truncated cone and cylindrical from top to bottom, be called cylinder 1, the frustum of a cone 2 and following cylinder 3 respectively, the diameter of last cylinder 1 is less than the small end of the frustum of a cone 2; The outside diameter of the frustum of a cone 2 is identical with following cylinder 3; On the outer wall of the frustum of a cone, have thermometer hole radially, thermometer hole is positioned at the point midway of the frustum of a cone 2 axial dimensions, and the inside of die is conical through-hole; The conical through-hole small end is positioned at cylinder 1, and big end is positioned at cylinder 3 down; The pyramidal structure of liner 4 for matching with the die conical through-hole; Place powder to be sintered in the liner 4; Punch seaming chuck 5 is cylindrical with punch push-down head 6; The height of cylinder 1 is consistent on punch seaming chuck 5 and the die, adopts this kind design can guarantee that powder to be sintered is in the axial temperature gradient field; The height of cylinder 1 is 25mm on the die, and wall thickness is 8～12mm, adopts this kind design can reduce the inner radial symmetry gradient of powder to be sintered, thereby guarantees each layer powder sintering under the temperature field of homogeneous; Cylinder 1 is a step surface with the frustum of a cone 2 junctions on the die, and the width of step surface is 10mm, the structure of step surface guarantee sample can be under higher axial compressive force sintering and do not damage graphite jig; The frustum of a cone 2 buses and horizontal plane angle are 45 °, realize the adjusting of axial-temperature gradient size in the mould through the size of regulating the frustum of a cone 2 buses and horizontal plane angle; Liner 4 wall thickness are 3mm, and the tapering of outer wall is consistent with the conical through-hole in the die.
The course of work and principle: before the sintering, earlier die is turned upside down, liner is packed in the conical through-hole of die, then with pack into the upper end of liner of punch seaming chuck, the required powder to be sintered of sintering functionally gradient material (FGM) of in the liner cavity, packing into successively; With pack into the lower end of liner of push-down head, put upside down mould more then, make seaming chuck vertically last; The aspect ratio inside liner of the die frustum of a cone is loaded the high 7mm of height of powder to be sintered; Thereby it is corresponding with the thermometer hole position to guarantee that powder to be sintered is in axial temperature gradient field middle section position interior and powder to be sintered; The relative position that guarantees liner and die simultaneously is constant, carries out sintering under definite temperature field thereby powder to be sintered is in; Temperature when in the thermometer hole of die, inserting the thermocouple measurement sintering can be carried out sintering in discharging plasma sintering equipment.When carrying out discharge plasma sintering, because electric current the density skewness of electric current can occur in the frustum of a cone of die part, the closeer part of electric current can produce more Joule heat, thus in the frustum of a cone part of die the generation axial-temperature gradient.
Adopt the successful completion of the mould of the utility model the plasma discharging method of TiB-Ti functionally gradient material (FGM) prepare, have good result of use.
Claims (8)
1. a graphite jig that is used for the functionally gradient material (FGM) sintering comprises die, liner (4), punch seaming chuck (5), punch push-down head (6), thermocouple and powder to be sintered, and the profile that wherein is characterised in that said die is the syllogic overall structure; Be followed successively by cylindrical, truncated cone and cylindrical from top to bottom; Be called cylinder (1), the frustum of a cone (2) and following cylinder (3) respectively, the diameter of last cylinder (1) is less than the small end of the frustum of a cone (2), and the outside diameter of the frustum of a cone (2) is identical with following cylinder (3); On the outer wall of the frustum of a cone (2), have thermometer hole radially; The inside of die is conical through-hole, and the conical through-hole small end is positioned at cylinder (1), and big end is positioned at cylinder (3) down; The pyramidal structure of liner (4) for matching with the die conical through-hole; Place powder to be sintered in the liner (4); Punch seaming chuck (5) and punch push-down head (6) are cylindrical; Neck bush is contained in the conical through-hole of die, and punch seaming chuck (5) and punch push-down head (6) are contained in the two ends up and down of liner (4) respectively and powder to be sintered is encapsulated in liner (4) inside; Thermocouple is placed in the thermometer hole of die.
2. a kind of graphite jig that is used for the functionally gradient material (FGM) sintering as claimed in claim 1 is characterized in that said thermometer hole is positioned at the point midway of the frustum of a cone (2) axial dimension.
3. a kind of graphite jig that is used for the functionally gradient material (FGM) sintering as claimed in claim 1 is characterized in that the height of cylinder (1) on said punch seaming chuck (5) and the die is consistent.
4. a kind of graphite jig that is used for the functionally gradient material (FGM) sintering as claimed in claim 3, the height that it is characterized in that cylinder on the said die (1) is 20～30mm, wall thickness is 8～12mm.
5. a kind of graphite jig that is used for the functionally gradient material (FGM) sintering as claimed in claim 1 is characterized in that cylinder on the said die (1) and the frustum of a cone (2) junction are step surface, and the width of step surface is 8～12mm.
6. a kind of graphite jig that is used for the functionally gradient material (FGM) sintering as claimed in claim 1, the scope that it is characterized in that the said frustum of a cone (2) bus and horizontal plane angle are 30 ° to 60 °.
7. a kind of graphite jig that is used for the functionally gradient material (FGM) sintering as claimed in claim 1 is characterized in that said liner (4) wall thickness is 2～3mm, and the tapering of outer wall is consistent with the conical through-hole of die.
8. a kind of graphite jig that is used for the functionally gradient material (FGM) sintering as claimed in claim 1 is characterized in that aspect ratio liner (4) lining of the said die frustum of a cone (2) loads the high 5～10mm of height of powder to be sintered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203804266U CN202224653U (en) | 2011-10-09 | 2011-10-09 | Graphite die for sintering gradient material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203804266U CN202224653U (en) | 2011-10-09 | 2011-10-09 | Graphite die for sintering gradient material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202224653U true CN202224653U (en) | 2012-05-23 |
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ID=46075261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203804266U Expired - Fee Related CN202224653U (en) | 2011-10-09 | 2011-10-09 | Graphite die for sintering gradient material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202224653U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103418788A (en) * | 2013-07-23 | 2013-12-04 | 浙江大学 | Device and method for thermoforming gradient materials |
| CN109848418A (en) * | 2019-02-14 | 2019-06-07 | 上海东洋炭素有限公司 | A kind of vacuum hotpressing stove graphite jig and its filler release method |
| CN110465664A (en) * | 2019-08-12 | 2019-11-19 | 江苏大学 | It is used to prepare the combined type discharging plasma agglomeration mold of gradient porous composite material |
-
2011
- 2011-10-09 CN CN2011203804266U patent/CN202224653U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103418788A (en) * | 2013-07-23 | 2013-12-04 | 浙江大学 | Device and method for thermoforming gradient materials |
| CN109848418A (en) * | 2019-02-14 | 2019-06-07 | 上海东洋炭素有限公司 | A kind of vacuum hotpressing stove graphite jig and its filler release method |
| CN109848418B (en) * | 2019-02-14 | 2021-03-30 | 上海东洋炭素有限公司 | Graphite mold for vacuum hot pressing furnace and filler demolding method thereof |
| CN110465664A (en) * | 2019-08-12 | 2019-11-19 | 江苏大学 | It is used to prepare the combined type discharging plasma agglomeration mold of gradient porous composite material |
| CN110465664B (en) * | 2019-08-12 | 2021-07-20 | 江苏大学 | Combined type discharge plasma sintering mold for preparing gradient porous composite material |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120523 Termination date: 20121009 |