CN1043035C - Quick preparation of composite by self-spread high-temp. instantaneous stamping - Google Patents
Quick preparation of composite by self-spread high-temp. instantaneous stamping Download PDFInfo
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- CN1043035C CN1043035C CN93107538A CN93107538A CN1043035C CN 1043035 C CN1043035 C CN 1043035C CN 93107538 A CN93107538 A CN 93107538A CN 93107538 A CN93107538 A CN 93107538A CN 1043035 C CN1043035 C CN 1043035C
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- high temperature
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Abstract
The present invention belongs to a preparation method of a compact material. In the preparation method, a self propagating high-temperature synthesis reaction is started through an instantaneous ignition electric current of 150A, and when a material is just synthesized and is still at a high temperature larger than 2000 DEG C, 100 to 180 tons of high pressure is immediately applied to a red heat material block in a softened condition for preparing the material with high compactness degree. Compared with a traditional material preparation method needing several hours of high temperature sintering, the method can complete the synthesis and the preparation of the material within 5 minutes, and any additional heat source except the instantaneous ignition electric current is needed. The preparation time and energy sources are greatly saved, and the production efficiency is very high. The compactness degree of the TiB2-Ti composite material prepared with the method is larger than 99%, and the TiB2-Ti composite material has favorable performance.
Description
The invention belongs to the cermet material preparation method.
In existing technology, the preparation metal adopts resistance furnace, hot pressing furnace or induction furnace etc. to carry out sintering with the matrix material of pottery mostly, and such sintering generally needs higher sintering temperature, long again simultaneously soaking time, this preparation method, process complexity not only, power consumption is also big simultaneously.
Latter stage in the sixties, Soviet Union scientist proposed the self propagating high temperature synthesis method, and this method mainly is to utilize the energy of high thermopositive reaction to make spontaneous the continuing of chemical reaction, thereby reaches the purpose of synthetic materials.Directly adopt this method synthetic material all be loosen, cavernous, so can only synthesize powder with this kind method.This makes the range of application of self propagating high temperature synthesis method have significant limitation.
The objective of the invention is on the basis of self propagating high temperature synthetic materials, further make the material densification, its main method be self propagating high temperature is synthetic just finished after, when material still is in the hot mastication state immediately to its high-pressure, finish the densification of material at short notice.
The process that the invention has the advantages that is simple, has saved preparation time greatly, except the instantaneous ignition electric current, does not need any additional power source, saves the energy, the strength of materials height of preparing.
The objective of the invention is to realize by following manner:
Suppress former base with conventional forming method, be placed in the self propagating high temperature synthetic mould that spark electrode is housed, spark electrode is a tungsten electrode, and two electrodes insert former base 1-2mm; Coated by sand around the former base, sand is answered natural air drying, and median size is 0.5mm; Mold integral is placed under the pressure head of press, connect the power switch of spark electrode, the big electric current of moment 150A will cause the self propagating high temperature building-up reactions of the former base of ceramic-metal composite; When after combustion wave had just spread the reaction of former base, former base, being in, descend the negative booster pressure head immediately, material is applied the pressure of 100-180 ton, keep this pressure 5-60 second, can obtain compact material greater than 2000 ℃ of pyritous soft states.Whole process is consuming time less than 5 minutes.TiB2-titanium composite material of preparing in this way can be made various types of metals and roll ring, grinding miller, withstand voltage mould etc.
Accompanying drawing 1 is mould structure synoptic diagram of the present invention.
Listed sign representative is as follows in the accompanying drawing 1:
1 press, 2 press pressure heads, 3 mould pressure heads
4 synthetic moulds, 5 former base 6 spark electrodes
7 coat sand 8 bed dies 9 Controlling System.
With reference to the accompanying drawings 1, implementation process of the present invention is: Ti powder and B powder are mixed according to a certain percentage, technology routinely is pressed into the former base 5 of ceramic-metal composite, places self propagating high temperature synthetic mould 4, covers by coating sand 7 around the former base 5 of ceramic-metal composite; Mold integral (comprising mould pressure head 3 and bed die 8) is placed under the press pressure head 2 of press 1; Connect the power switch of spark electrode 6, the 150A high-current leading is sent out the self propagating high temperature reaction of Ti and B, will form TiB by proportioning
2-Ti; After burning had just spread the former base 5 of whole ceramic-metal composite, descend the press pressure head 2 of negative booster 1 immediately, apply 140 tons pressure, and make pressure keep for 30 seconds, get final product compact material.2 minutes only consuming time of whole process of preparation, the degree of compactness of gained material＞99%, mean grain size 1.5 μ m, hardness HRA88, bending strength 1200MPa.
Claims (3)
1. the synthetic instantaneous stamping of self propagating high temperature prepares ceramic-metallic method fast, its feature places the former base (5) of ceramic-metal composite at what the self propagating high temperature synthetic mould (4) of spark electrode (6), two electrodes insert former base (5) 1-2mm of ceramic-metal composite, former base (5) uses sand (7) to coat all around, mold integral is placed under the press pressure head (2), connect electrode, make immediate current cause the self propagating high temperature building-up reactions of former base (5), when synthetic materials still is in the hot mastication state, following negative booster pressure head (2) the 100-180 ton that pressurizes immediately, and pressurize 5-60 second, obtain compact material.
2. the synthetic instantaneous stamping of self propagating high temperature according to claim 1 is the ceramic-metallic method of preparation fast, it is characterized in that the immediate current of spark electrode (6) reaches 150A.
3. the synthetic instantaneous stamping of a kind of self propagating high temperature according to claim 1 prepares ceramic-metallic method, it is characterized in that coating sand (7) median size of natural air drying is 0.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93107538A CN1043035C (en) | 1993-06-22 | 1993-06-22 | Quick preparation of composite by self-spread high-temp. instantaneous stamping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93107538A CN1043035C (en) | 1993-06-22 | 1993-06-22 | Quick preparation of composite by self-spread high-temp. instantaneous stamping |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1080913A CN1080913A (en) | 1994-01-19 |
| CN1043035C true CN1043035C (en) | 1999-04-21 |
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ID=4986753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93107538A Expired - Fee Related CN1043035C (en) | 1993-06-22 | 1993-06-22 | Quick preparation of composite by self-spread high-temp. instantaneous stamping |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1043035C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101775517B (en) * | 2009-09-18 | 2012-07-18 | 江阴东大新材料研究院 | Method for preparing TiC/Al2O3/Fe composite ceramic matrix composite material |
| CN107324293A (en) * | 2017-02-27 | 2017-11-07 | 武汉理工大学 | The supper-fast method for preparing high-performance p-type SnTe block thermoelectric materials of one step |
| CN112582526B (en) * | 2020-11-30 | 2023-02-07 | 北京芯可鉴科技有限公司 | Method for preparing ZrNiSn block thermoelectric material and battery |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1064260A (en) * | 1991-02-19 | 1992-09-09 | 陶氏化学公司 | With the fine and close self-reinforced silicon nitride ceramic that does not have the preparation of pressure or low-pressure gas sintering process |
| CN1088993A (en) * | 1992-12-31 | 1994-07-06 | 北京科技大学 | The sintering metal manufacturing technology |
-
1993
- 1993-06-22 CN CN93107538A patent/CN1043035C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1064260A (en) * | 1991-02-19 | 1992-09-09 | 陶氏化学公司 | With the fine and close self-reinforced silicon nitride ceramic that does not have the preparation of pressure or low-pressure gas sintering process |
| CN1088993A (en) * | 1992-12-31 | 1994-07-06 | 北京科技大学 | The sintering metal manufacturing technology |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1080913A (en) | 1994-01-19 |
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