CN101805839A - Preparation method of secondary skeleton infiltration alloy material - Google Patents
Preparation method of secondary skeleton infiltration alloy material Download PDFInfo
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- CN101805839A CN101805839A CN 201010153435 CN201010153435A CN101805839A CN 101805839 A CN101805839 A CN 101805839A CN 201010153435 CN201010153435 CN 201010153435 CN 201010153435 A CN201010153435 A CN 201010153435A CN 101805839 A CN101805839 A CN 101805839A
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Abstract
The invention discloses a preparation method of secondary skeleton infiltration alloy material, belonging to the technical field of materials. The preparation method comprises the following steps: preparing a skeleton, putting the skeleton into a vacuum sintering furnace, and carrying out infiltration by infiltration agent. The skeleton is prepared by the following steps: (1) putting skeleton powder into a container for compaction, sintering in vacuum to obtain a once-sintering skeleton, smashing the once skeleton into secondary powder of which the average grain size is 2-8 times of that of the original skeleton powder; and (2) compacting the secondary powder, sintering in vacuum to prepare the secondary skeleton. The method of the invention sinters the once skeleton after smashing the once skeleton, which not only improves skeleton porosity but also causes secondary skeleton pore distribution to be more even, so that the secondary skeleton has small possibility of collapsing. The infiltration alloy prepared by the method has better comprehensive performance, even tissue and high density. The method of the invention has simple technology, easy implementation and favorable application prospect.
Description
Technical field
The invention belongs to the material technology field, particularly a kind of preparation method of secondary skeleton infiltration alloy material.
Background technology
Infiltration is a common method of producing refractory metal and the formed pseudoalloy of low melting point metal, liquid metal (or alloy) contacts with porousness solid (skeleton) outside surface, thereby by the open pore liquid metal is attracted to the inner pseudoalloy that forms of skeleton by capillary force.Existing infiltration technique is prepared into skeleton with a kind of metal (or alloy) sintering usually, then another kind of metal (or alloy) infiltration when the liquid state is advanced in the skeleton, and step comprises preparation skeleton, reduction, infiltration and processed finished products; The alloy density that infiltration method obtains is higher, mature production technology, but the matrix porosity that its main drawback is a sintering to be formed is less, the liquid metal that can infiltration enters is limited, agent penetrates in the high metal of fusing point as infiltration because binary infiltration system need adopt low-melting metal, usually cause low-melting metal content in pseudoalloy lower, require the field of composition for some, the use of the pseudoalloy of infiltration preparation is restricted, and therefore developing a kind of technology that can change infiltration pseudoalloy component proportions is present urgent problem.
Summary of the invention
At the prior art problem, the invention provides a kind of preparation method of secondary skeleton infiltration alloy material, purpose is to improve the porosity of skeleton by the skeleton metal is carried out double sintering, and then obtains the higher infiltration alloy of low melting point component content.
Preparation method's step of secondary skeleton infiltration alloy material of the present invention comprises the preparation skeleton, then skeleton is placed vacuum sintering furnace, adopts the infiltration agent in vacuum tightness 1 * 10
-4～9 * 10
-3Under the Pa condition, temperature is higher than under 100～400 ℃ of conditions of infiltration agent fusing point carries out infiltration, and the infiltration time is 2～10h; Wherein preparing skeleton carries out according to the following steps:
1, the skeleton powder being placed container jolt ramming, is 1 * 10 in vacuum tightness then
-4～9 * 10
3Under the Pa condition, be heated to the sintering temperature sintering, sintering time 2～10h obtains one time skeleton, skeleton is crushed to median size again and is 2～8 times of skeleton powder median size, obtains the secondary powder.
2, the secondary powder being placed container jolt ramming, is 1 * 10 in vacuum tightness then
-4～9 * 10
-3Under the Pa condition, be heated to the sintering temperature sintering, sintering time 2～10h makes secondary skeleton.
Above-mentioned skeleton powder particles is 80～250 orders (particle diameter 175 μ m～61 μ m).
Described sintering temperature is: as the T that is of this melting point metal
mThe time, sintering temperature is 0.6～0.8T
m(T
mUnit be absolute temperature K).
Above-mentioned skeleton powder is Al powder, Cr powder, Co powder, Cu powder, Fe powder, Mn powder, Mo powder, Ni powder, Si powder, Ag powder, W powder, Pt powder, WC powder or TiC powder.
An above-mentioned matrix porosity rate is 42～55%, and the porosity of secondary skeleton is 60～74%.
In the aforesaid method, when the skeleton powder was the Al powder, Bi or Pb were chosen in the infiltration agent; When the skeleton powder was the Cr powder, Al, Bi, Co, Cu, Pb, Ag or Sn were chosen in the infiltration agent; When the skeleton powder was the Co powder, Bi, Cu, Pb, Ag or Sn were chosen in the infiltration agent; When the skeleton powder was the Fe powder, Al, Sb, Cu, Pb, Ag, Mg, Sn or Zn were chosen in the infiltration agent; When the skeleton powder was the Mn powder, Bi, Pb, Ag or Tl were chosen in the infiltration agent; When the skeleton powder was the Mo powder, Al, Bi, Cu, Ag, Sn or Zn were chosen in the infiltration agent; When the skeleton powder was the Ni powder, Bi, Cu, Pb, Mg, Hg or Ag were chosen in the infiltration agent; When the skeleton powder was the Si powder, Cu, Sb or Sn were chosen in the infiltration agent; When the skeleton powder was the Cu powder, Sb, Bi, Pb, Hg, Zn or Sn were chosen in the infiltration agent; When the skeleton powder was the W powder, Al, Bi, Ca, Cu, Au, Ni, Pb or Ag were chosen in the infiltration agent; When the skeleton powder was the WC alloy powder, Co, Cu, Fe, Ni or Ag were chosen in the infiltration agent; When the skeleton powder was the Ag powder, Bi or Hg were chosen in the infiltration agent; When the skeleton powder was the Pt powder, Au or Ag were chosen in the infiltration agent; When the skeleton powder was the TiC alloy powder, Co, Cu, Fe or Ni were chosen in the infiltration agent.
Principle of the present invention is: the skeleton after once sintered is not enough because of porosity, and when therefore directly carrying out infiltration, the content of infiltration agent is limited in the infiltration alloy of acquisition; After skeleton is pulverized by certain particle, sintering once more, its porosity increases, and even pore distribution, and over-all properties is better.
Method of the present invention has not only improved the porosity of skeleton by a skeleton is pulverized sintering again, and can make the void distribution of secondary skeleton more even, and secondary skeleton firm being difficult for caves in; The infiltration alloy that adopts aforesaid method to obtain has possessed comprehensive performance, homogeneous microstructure, density height.Method technology of the present invention is simple, easy to implement, have a good application prospect.
Description of drawings
Fig. 1 is the intensive stacking provisions synoptic diagram of skeleton powder of the present invention.
Fig. 2 is the intensive stacking provisions synoptic diagram of secondary powder of the present invention.
Fig. 3 is a skeleton electron photomicrograph figure in the embodiment of the invention 1.
Fig. 4 is the secondary skeleton electron photomicrograph figure in the embodiment of the invention 1.
Embodiment
The skeleton powder that adopts in the embodiment of the invention and the weight purity of infiltration agent are greater than 99.9%.
The vacuum sintering furnace model that adopts during infiltration in the embodiment of the invention is VS-100H.
Each time agglomerating sintering temperature is in this melting point metal temperature T in the embodiment of the invention
m0.6～0.8 times of scope in.
The granularity of each skeleton powder is 80～250 orders in the embodiment of the invention.
When carrying out infiltration in the embodiment of the invention, the add-on of infiltration agent is 101～105% of a secondary skeleton volume of voids.
Embodiment 1
With mean particle size is that 150 purpose Cr powder place container jolt ramming, is 1 * 10 in vacuum tightness
-3Be heated to 1350 ℃ under the Pa condition, sintering time is 5h, obtains one time skeleton, and its porosity is 55%.
Adopting mechanical process to be crushed to median size on skeleton and be 5 times of skeleton powder median size, place container jolt ramming, is 1 * 10 in vacuum tightness
-3Be heated to 1350 ℃ of sintering under the Pa condition, sintering time is 10h, obtains secondary skeleton, and its porosity is 74%.
Is 3 * 10 with secondary skeleton in vacuum tightness
-3Under the condition of Pa, temperature is under 1350 ℃ of conditions, adds liquid metal Cu and carries out infiltration, and the infiltration time is 10h, obtain copper chromium infiltration alloy, its composition is Cu73.6% by weight percentage, Cr26.4%, the relative density of this alloy is 99.5%, and specific conductivity is 32Ms/m, and hardness is 85Hv; Oxygen level is 260ppm, and nitrogen content is 21ppm.
According to GB, copper chromium electrical contact surface do not allow crackle, fall piece and length greater than the pore of 150 μ m, defective such as be mingled with; Do not allow and scratch or more than or equal to 1mm
2Enrichment chromium mutually or the enriching Cu phase; Allow three places more than or equal to 0.5mm
2And less than the enrichment phase of 1mm2, but its phase mutual edge distance should be less than 15mm
2Through check, above-mentioned copper chromium infiltration alloy meets national electrical contact material standard; Enriching Cu phase particle diameter is 260 μ m, and enrichment chromium phase particle diameter is 181 μ m.
The electron photomicrograph of skeleton and secondary skeleton respectively as shown in Figure 3 and Figure 4, the matrix porosity rate behind the double sintering obviously increases and even pore distribution as seen from the figure.
Embodiment 2
The skeleton powder that adopts is the Al powder, and mean particle size is 140 orders, and the Al powder is placed container jolt ramming, is 1 * 10 in vacuum tightness
-4Be heated to 473 ℃ of sintering under the Pa condition, sintering time is 10h, obtains one time skeleton, and its porosity is 51%; It is 6 times of skeleton powder median size that skeleton machinery is crushed to median size, places container jolt ramming, is 1 * 10 in vacuum tightness
-4Be heated to 470 ℃ of sintering under the Pa condition, sintering time 8h obtains secondary skeleton, and its porosity is 71%.
Secondary skeleton is placed vacuum sintering furnace, adopt infiltration agent Pb in vacuum tightness 1 * 10
-4Under the Pa condition, temperature is higher than under 100 ℃ of conditions of infiltration agent Pb fusing point carries out infiltration, and the infiltration time is 5h, obtains the infiltration PbAl alloy of Pb content 70%.
Embodiment 3
The skeleton powder that adopts is the Co powder, and mean particle size is 250 orders, and the Co powder is placed container jolt ramming, is 2 * 10 in vacuum tightness
-3Be heated to 1055 ℃ of sintering under the Pa condition, sintering time 8h obtains one time skeleton, and its porosity is 42%; It is 8 times of skeleton powder median size that Co skeleton machinery is crushed to median size, places container jolt ramming, is 2 * 10 in vacuum tightness
-3Be heated to 1055 ℃ of sintering under the Pa condition, sintering time 4h obtains secondary skeleton, and its porosity is 64%.
Secondary skeleton is placed vacuum sintering furnace, adopt infiltration agent Pb in vacuum tightness 2 * 10
-3Under the Pa condition, temperature is higher than under 200 ℃ of conditions of infiltration agent Pb fusing point carries out infiltration, and the infiltration time is 4h, obtains the infiltration PbCo alloy of Pb content 66%.
Embodiment 4
The skeleton powder that adopts is the Mn powder, and mean particle size 180 orders place container jolt ramming with the Mn powder, are 3 * 10 in vacuum tightness
-3Be heated to 940 ℃ of sintering under the Pa condition, sintering time 6h obtains one time skeleton, and its porosity is 50%; It is 2 times of skeleton powder median size that Mn skeleton machinery is crushed to median size, places container jolt ramming, is 3 * 10 in vacuum tightness
-3Be heated to 940 ℃ of sintering under the Pa condition, sintering time 2h obtains secondary skeleton, and its porosity is 60%.
Secondary skeleton is placed vacuum sintering furnace, adopt infiltration agent Pb in vacuum tightness 3 * 10
-3Under the Pa condition, temperature is higher than under 250 ℃ of conditions of infiltration agent Pb fusing point carries out infiltration, and the infiltration time is 5h, obtains the infiltration PbMn alloy of Pb content 61%.
Embodiment 5
The skeleton powder that adopts is the Mo powder, and mean particle size 175 orders place container jolt ramming with the Mo powder, are 9 * 10 in vacuum vacuum tightness
-3Be heated to 2000 ℃ of sintering under the Pa condition, sintering time 4h obtains one time skeleton, and its porosity is 55%; It is 5 times of skeleton powder median size that skeleton machinery is crushed to median size, places container method jolt ramming by hand, is 9 * 10 in vacuum tightness
-3Be heated to 2100 ℃ of sintering under the Pa condition, sintering time 10h obtains secondary skeleton, and its porosity is 69%.
Secondary skeleton is placed vacuum sintering furnace, adopt infiltration agent Cu in vacuum tightness 4 * 10
-3Under the Pa condition, temperature is higher than under 400 ℃ of conditions of infiltration agent Cu fusing point carries out infiltration, and the infiltration time is 2h, obtains the infiltration MoCu alloy of Cu content 69%.
Embodiment 6
The skeleton powder that adopts is the Ni powder, and mean particle size 165 orders place container jolt ramming with the Ni powder, are 5 * 10 in vacuum tightness
-3Be heated to 1107 ℃ of sintering under the Pa condition, sintering time 5h obtains one time skeleton, and its porosity is 49%; It is 5 times of skeleton powder median size that skeleton machinery is crushed to median size, places container method jolt ramming by hand, is 5 * 10 in vacuum tightness
-3Be heated to 1107 ℃ of sintering under the Pa condition, sintering time 5h obtains secondary skeleton, and its porosity is 68%.
Secondary skeleton is placed vacuum sintering furnace, adopt infiltration agent Mg in vacuum tightness 5 * 10
-3Under the Pa condition, temperature is higher than under 250 ℃ of conditions of infiltration agent Mg fusing point carries out infiltration, and the infiltration time is 5h, obtains the infiltration MgNi alloy of Mg content 67%.
Embodiment 7
The skeleton powder that adopts is the Si powder, and mean particle size 80 orders place container jolt ramming with the Si powder, are 4 * 10 in vacuum tightness
- 3Be heated to 1075 ℃ of sintering under the Pa condition, sintering time 7h, wherein vacuum obtains one time skeleton, and its porosity is 55%; It is 2 times of skeleton powder median size that skeleton machinery is crushed to median size, places container jolt ramming, is 4 * 10 in vacuum tightness
-3Be heated to 1075 ℃ of sintering under the Pa condition, insulation 6h obtains secondary skeleton, and its porosity is 66%.
Secondary skeleton is placed vacuum sintering furnace, adopt infiltration agent Sb in vacuum tightness 6 * 10
-3Under the Pa condition, temperature is higher than under 300 ℃ of conditions of infiltration agent Sb fusing point carries out infiltration, and the infiltration time is 5h, obtains the infiltration SbSi alloy of Sb content 66%.
Embodiment 8
The skeleton powder that adopts is the Cu powder, and mean particle size 160 orders place container jolt ramming with the Cu powder, are 3 * 10 in vacuum tightness
-4Be heated to 810 ℃ of sintering under the Pa condition, sintering time 3h obtains one time skeleton, and its porosity is 53%; It is 8 times of skeleton powder median size that skeleton machinery is crushed to median size, places container jolt ramming, is 3 * 10 in vacuum tightness
-4Be heated to 810 ℃ of sintering under the Pa condition, sintering time 9h obtains secondary skeleton, and its porosity is 70%.
Secondary skeleton is placed vacuum sintering furnace, adopt infiltration agent Zn in vacuum tightness 7 * 10
-4Under the Pa condition, temperature is higher than under 100 ℃ of conditions of infiltration agent Sn fusing point carries out infiltration, and the infiltration time is 10h, obtains the infiltration SnCu alloy of Zn content 71%.
Embodiment 9
The skeleton powder that adopts is the W powder, and mean particle size 195 orders place container jolt ramming with the W powder, are 2 * 10 in vacuum tightness
-3Be heated to 2576 ℃ of sintering under the Pa condition, sintering time 6h obtains one time skeleton, and its porosity is 46%; It is 3 times of skeleton powder median size that skeleton machinery is crushed to median size, places container jolt ramming, is 2 * 10 in vacuum tightness
-3Be heated to 2576 ℃ of sintering under the Pa condition, sintering time 6h obtains secondary skeleton, and its porosity is 66%.
Secondary skeleton is placed vacuum sintering furnace, adopt infiltration agent Cu in vacuum tightness 8 * 10
-3Under the Pa condition, temperature is higher than under 300 ℃ of conditions of infiltration agent Co fusing point carries out infiltration, and the infiltration time is 5h, obtains the infiltration cu W alloy of Cu content 65%.
Embodiment 10
The skeleton powder that adopts is the WC powder, and mean particle size 140 orders place container jolt ramming with the WC powder, are 1 * 10 in vacuum tightness
-3Be heated to 1400 ℃ of sintering under the Pa condition, sintering time 6h obtains one time skeleton, and its porosity is 50%; It is 3 times of skeleton powder median size that skeleton machinery is crushed to median size, places container jolt ramming, is 1 * 10 in vacuum tightness
-3Be heated to 1400 ℃ of sintering under the Pa condition, sintering time 6h obtains secondary skeleton, and its porosity is 63%.
Secondary skeleton is placed vacuum sintering furnace, adopt infiltration agent Cu in vacuum tightness 9 * 10
-3Under the Pa condition, temperature is higher than under 400 ℃ of conditions of infiltration agent Cu fusing point carries out infiltration, and the infiltration time is 4h, obtains the infiltration cu WC alloy of Cu content 62%.
Embodiment 11
The skeleton powder that adopts is the Fe powder, and mean particle size 80 orders place container jolt ramming with the Fe powder, are 1 * 10 in vacuum tightness
-3Be heated to 1174 ℃ of sintering under the Pa condition, sintering time 6h obtains one time skeleton, and its porosity is 54%; It is 3 times of skeleton powder median size that skeleton machinery is crushed to median size, places container jolt ramming, is 1 * 10 in vacuum tightness
-3Be heated to 1174 ℃ of sintering under the Pa condition, sintering time 6h obtains secondary skeleton, and its porosity is 69%.
Secondary skeleton is placed vacuum sintering furnace, adopt infiltration agent Cu in vacuum tightness 1 * 10
-3Under the Pa condition, temperature is higher than under 100 ℃ of conditions of infiltration agent Cu fusing point carries out infiltration, and the infiltration time is 4h, obtains the infiltration cu Fe alloy of Cu content 69%.
Embodiment 12
The skeleton powder that adopts is the TiC powder, and mean particle size 200 orders place container jolt ramming with the TiC powder, are 2 * 10 in vacuum tightness
-3Be heated to 1750 ℃ of sintering under the Pa condition, sintering time 3h obtains one time skeleton, and its porosity is 44%; It is 2 times of skeleton powder median size that skeleton machinery is crushed to median size, places container jolt ramming, is 4 * 10 in vacuum tightness
-3Be heated to 1750 ℃ of sintering under the Pa condition, sintering time 5h obtains secondary skeleton, and its porosity is 60%.
Secondary skeleton is placed vacuum sintering furnace, adopt infiltration agent Co in vacuum tightness 2 * 10
-3Under the Pa condition, temperature is higher than under 200 ℃ of conditions of infiltration agent Co fusing point carries out infiltration, and the infiltration time is 5h, obtains the infiltration CoTiC alloy of Co content 60%.
Embodiment 13
The skeleton powder that adopts is the Ag powder, and mean particle size 200 orders place container jolt ramming with the Ag powder, are 6 * 10 in vacuum tightness
-3Be heated to 714 ℃ of sintering under the Pa condition, sintering time 6h obtains one time skeleton, and its porosity is 43%; It is 4 times of skeleton powder median size that skeleton machinery is crushed to median size, places container jolt ramming, is 3 * 10 in vacuum tightness
-3Be heated to 714 ℃ of sintering under the Pa condition, sintering time 6h obtains secondary skeleton, and its porosity is 62%.
Secondary skeleton is placed vacuum sintering furnace, adopt infiltration agent Bi in vacuum tightness 3 * 10
-3Under the Pa condition, temperature is higher than under 100 ℃ of conditions of infiltration agent Bi fusing point carries out infiltration, and the infiltration time is 4h, obtains the infiltration cu Bi alloy of Bi content 61%.
Embodiment 14
Adopting mean particle size is 100 purpose Cr powder, and once sintered method is with embodiment 1, and the porosity that obtains a skeleton is 53%; It is 2 times of skeleton powder median size that skeleton machinery is crushed to median size, carries out double sintering, and method is with embodiment 1, and the double sintering time is 8h, and the porosity that obtains secondary skeleton is 64%.
Infiltrating method is with embodiment 1, and the acquisition weight percent is Cu64%, the copper chromium infiltration alloy of Cr36%.
Embodiment 15
Adopting mean particle size is 220 purpose Cr powder, and once sintered method is with embodiment 1, and the porosity that obtains a skeleton is 42%; It is 5 times of skeleton powder median size that skeleton machinery is crushed to median size, carries out double sintering, and method is with embodiment 1, and the double sintering time is 5h, and the porosity that obtains secondary skeleton is 68%.
Infiltrating method is with embodiment 1, and the acquisition weight percent is Cu68%, the copper chromium infiltration alloy of Cr32%.
Embodiment 16
Adopting mean particle size is 190 purpose Cr powder, and once sintered method is with embodiment 1, and the porosity that obtains a skeleton is 45%; It is 4 times of skeleton powder median size that skeleton machinery is crushed to median size, carries out double sintering, and method is with embodiment 1, and the double sintering time is 3h, and the porosity that obtains secondary skeleton is 58%.
Infiltrating method is with embodiment 1, and the acquisition weight percent is Cu58%, the copper chromium infiltration alloy of Cr42%.
Claims (4)
1. the preparation method of a secondary skeleton infiltration alloy material, step comprises the preparation skeleton, then skeleton is placed vacuum sintering furnace, adopts the infiltration agent in vacuum tightness 1 * 10
-4～9 * 10
-3Under the Pa condition, temperature is higher than under 100～400 ℃ of conditions of infiltration agent fusing point carries out infiltration, and the infiltration time is 2～10h; It is characterized in that described preparation skeleton carries out according to the following steps:
(1) the skeleton powder being placed container jolt ramming, is 1 * 10 in vacuum tightness then
-4～9 * 10
-3Under the Pa condition, be heated to the sintering temperature sintering, sintering time 2～10h obtains once sintered skeleton, skeleton is crushed to median size again and is 2～8 times of former skeleton powder median size, obtains the secondary powder;
(2) the secondary powder being placed container jolt ramming, is 1 * 10 in vacuum tightness then
-4～9 * 10
-3Under the Pa condition, be heated to the sintering temperature sintering, sintering time 2～10h makes secondary skeleton.
2. the preparation method of a kind of secondary skeleton infiltration alloy material according to claim 1 is characterized in that described skeleton powder raw material chooses Al powder, Cr powder, Co powder, Cu powder, Fe powder, Mn powder, Mo powder, Ni powder, Si powder, Ag powder, W powder, Pt powder, WC powder or TiC powder; Described skeleton powder particles is 80～250 orders.
3. the preparation method of a kind of secondary skeleton infiltration alloy material according to claim 1 is characterized in that a described matrix porosity rate is 42～55%, and the porosity of secondary skeleton is 60～74%.
4. the preparation method of a kind of secondary skeleton infiltration alloy material according to claim 1 and 2, when it is characterized in that described skeleton powder is the Al powder, Bi or Pb are chosen in the infiltration agent; When described skeleton powder was the Cr powder, Al, Bi, Co, Cu, Pb, Ag or Sn were chosen in the infiltration agent; When described skeleton powder was the Co powder, Bi, Cu, Pb, Ag or Sn were chosen in the infiltration agent; When described skeleton powder was the Fe powder, Al, Sb, Cu, Pb, Ag, Mg, Sn or Zn were chosen in the infiltration agent; When described skeleton powder was the Mn powder, Bi, Pb, Ag or Tl were chosen in the infiltration agent; When described skeleton powder was the Mo powder, Al, Bi, Cu, Ag, Sn or Zn were chosen in the infiltration agent; When described skeleton powder was the Ni powder, Bi, Cu, Pb, Mg, Hg or Ag were chosen in the infiltration agent; When described skeleton powder was the Si powder, Cu, Sb or Sn were chosen in the infiltration agent; When described skeleton powder was the Cu powder, Sb, Bi, Pb, Hg, Zn or Sn were chosen in the infiltration agent; When described skeleton powder was the W powder, Al, Bi, Ca, Cu, Au, Ni, Pb or Ag were chosen in the infiltration agent; When described skeleton metal powder material was the WC alloy powder, Co, Cu, Fe, Ni or Ag were chosen in the infiltration agent; When described skeleton powder was the Ag powder, Bi or Hg were chosen in the infiltration agent; When described skeleton powder was the Pt powder, Au or Ag were chosen in the infiltration agent; When described skeleton powder was the TiC alloy powder, Co, Cu, Fe or Ni were chosen in the infiltration agent.
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| CN107983967A (en) * | 2017-11-06 | 2018-05-04 | 江苏精研科技股份有限公司 | A kind of injection moulding preparation method of AgW electrical contacts |
| WO2019072240A1 (en) * | 2017-10-13 | 2019-04-18 | 福达合金材料股份有限公司 | Preparation method for superfine high dispersion silver-tungsten electrical contact material |
| CN111363941A (en) * | 2020-03-27 | 2020-07-03 | 陕西理工大学 | Polygonal microstructure tungsten alloy material and preparation method and application thereof |
| CN113789456A (en) * | 2021-09-17 | 2021-12-14 | 中国科学院空天信息创新研究院 | Method and device for soaking copper in tungsten sponge matrix |
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| US20040009086A1 (en) * | 2000-05-22 | 2004-01-15 | Sachs Emanuel M | Infiltration of a powder metal skeleton of a similar materials using melting point depressant |
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| US20040009086A1 (en) * | 2000-05-22 | 2004-01-15 | Sachs Emanuel M | Infiltration of a powder metal skeleton of a similar materials using melting point depressant |
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| WO2019072240A1 (en) * | 2017-10-13 | 2019-04-18 | 福达合金材料股份有限公司 | Preparation method for superfine high dispersion silver-tungsten electrical contact material |
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