CN103540779A - Method for preparing copper and iron immiscible alloy - Google Patents
Method for preparing copper and iron immiscible alloy Download PDFInfo
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- CN103540779A CN103540779A CN201210240150.0A CN201210240150A CN103540779A CN 103540779 A CN103540779 A CN 103540779A CN 201210240150 A CN201210240150 A CN 201210240150A CN 103540779 A CN103540779 A CN 103540779A
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Abstract
The invention discloses a method for preparing copper and iron immiscible alloy. According to the method, powdery reactants selected from cupric oxide, aluminum, iron and copper are adopted as starting materials, and the alloy is prepared by adopting a combustion synthesis and melting technology. The method has the advantages that required equipment is simple, the energy consumption is low, the cycle is short, the cost is low, and the prepared alloy is free of macrosegregation and has good mechanical properties.
Description
Technical field
The present invention has narrated a kind of preparation method of copper iron immiscible alloy.
Background technology
Binary alloy formation enthalpys of two constituent elements within the scope of certain ingredients such as difficult miscible Cu-Fe, Fe-Mg, Cu-W, Cu-Co, Cu-Nb, Cu-Cr, Cu-Ta, Cu-V, Ag-Cu, Ag-Fe, Ag-Ni, Ti-Mg, Al-Bi be on the occasion of, can not form stable intermetallic compound.As a class metastable state alloy, they have a series of new and excellent physics and chemistry performances.In recent years, Cu-Fe alloy system has especially caused numerous scholars' concern.Cu-Fe alloy is a kind of good contact, tactile bridge and vacuum device material; And wear resistance and excellent thermal conductivity, at aspects such as magneticsubstance, welding rod, electrode materialss, have wide practical use (Ma E, Alloys created between immiscible elements,
progress in Materials Science, 2005,50,413).For example, yet Cu-Fe alloy is almost full composition metastable state unmixing region, Cu under liquidus line
50fe
50the formation enthalpy that (atomic ratio, lower same) alloy forms intermetallic compound is about 10.8 positive kJ/mol(Yavari AR, Desre PJ, and Benameur T, Mechanically driven alloying of immiscible elements,
physical Review Letters, 1992,
68, 147).Therefore, in process of setting, very easily form macrosegregation tissue, can not obtain pure two phase alloys or the single-phased alloy of segregation-free, its application is limited by very large.In order to obtain the miscible Cu-Fe alloy of difficulty of segregation-free, many researchists have carried out large quantity research to its preparation and process of setting.The He of the vertical university of Louisiana, United States etc. has prepared the nano combined Cu-Fe alloy of rich Cu and rich Fe two phase composites in conjunction with the method for hot pressed sintering by mechanical ball milling, but do not report whether it exists segregation (He L, Ma E, Processing and microhardness of bulk Cu-Fe nanocomposites
nanoStructured Materials, 1996,
7, 327).The Ma of U.S. John Hopkins University summed up the preparation method of difficult miscible Cu-Fe alloy in 2005, comprised hot vapour deposition method, sputtering method, mechanical ball milling method etc., but these methods generally all be take and obtained single-phase supersaturated solid solution as target is to avoid component segregation.These methods are difficult to obtain the single-phase composition in full composition range on the one hand; On the other hand, the performance of single-phase composition Cu-Fe alloy has its limitation.Therefore, pure two phase alloys of acquisition segregation-free more have using value.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of copper iron immiscible alloy.
The present invention adopts and selects the powdered reactant of cupric oxide, aluminium, iron, copper is starting raw material, adopts the synthetic smelting technology of burning to prepare alloy.
A preparation method for copper iron immiscible alloy, is characterized in that the method takes respectively cupric oxide powder, aluminium powder, iron powder, copper powder in 29.6:10:4～30:1～30 in mass ratio, and after mixing, mechanical ball milling is dry mixed 6～12 hours, with the pressure of 40～60MPa by the reaction mass mixing compacting in steel die, then pressure embryo is placed in to reaction vessel, on reaction mass top, put detonator briquetting, pass into argon gas purge reaction vessel to get rid of air wherein, reaction mass is heated to after 180 ℃～210 ℃, continue to pass into argon gas purge reaction vessel to get rid of the gas from reaction mass surface desorption, and then pass into the argon gas of 4～8MPa, reaction mass is continued to be heated to 220 ℃～290 ℃, the large calorimetric of emitting by detonator spontaneous reaction in this temperature range carrys out the reaction of initiation reaction material, reaction completes within the several seconds, reaction product is cooled to after room temperature with reaction vessel, takes out from container product, and product surface impurity is removed and obtained product copper iron immiscible alloy, the mixture that described detonator is comprised of permanganate, aluminium powder and sulphur powder, wherein permanganate: aluminium powder: the mass ratio of sulphur powder is 1.0～2.0: 1.5～2.5: 1～2.0.
Detonator briquetting of the present invention accounts for 1%～3% of reactant total mass.
The present invention adopts the synthetic smelting technology of burning to prepare difficult miscible copper-iron alloy, and this method simple process, required equipment material simple, with low cost, preparation do not have macrosegregation and have good mechanical property.
The present invention adopts the synthetic smelting technology of burning to prepare copper iron immiscible alloy, this method can one-step synthesis product and is realized densification, be that a kind of technique is simple, required equipment is simple, with short production cycle without macrosegregation and there is the preparation method of good mechanical property.
Adopt drainage to carry out density measurement, material relative density is greater than 99%.After sanding and polishing, use the heterogeneous microstructure of sem observation analysis of material.Measurement of hardness condition is that load 300g, loads time length 10s.Compressive strength specimen size is φ 3mm * 4.5mm, and it is 0.06mm/min that pressure head moves down speed.
One of feature of the present invention: material density is high, even without macrosegregation, weave construction, as shown in Figure 1.
Two of feature of the present invention: material mechanical performance is excellent.
Three of feature of the present invention: simple process, required equipment is simple, cost is low.
Table 1 the present invention prepares the mechanical property of copper-steel material material.
| Material forms | Microhardness (GPa) | Ultimate compression strength (MPa) |
| Cu 60Fe 40 | 1.9 | 1052 |
| Cu 40Fe 60 | 2.5 | 1100 |
Accompanying drawing explanation
Fig. 1 is the weave construction photo that the present invention prepares material.Material is fine and close, two-phase is evenly distributed, without macrosegregation.
Embodiment
Embodiment 1:
29.6:10:21:13 takes respectively cupric oxide powder, aluminium powder, iron powder, copper powder in mass ratio, and after mixing, mechanical ball milling is dry mixed 6 hours, the pressure compacting in steel grinding tool by mixture with 50MPa.Then pressure embryo is placed in to reaction vessel, on reaction mass with detonator, pass into argon purge reaction vessel, to get rid of air wherein, reaction mass is heated to after 180 ℃, continue to pass into argon purge reaction vessel to get rid of the gas from reaction mass surface desorption, pass into again the argon gas of 8MPa, reaction mass is continued to be heated to 240 ℃, and by detonator initiation reaction, reaction completes within the several seconds.Reaction product is cooled to after room temperature with reaction vessel, takes out from container, after removal surface alumina oxide impurity, obtains product.
Embodiment 2:
29.6:10:29:9 takes respectively cupric oxide powder, aluminium powder, iron powder, copper powder in mass ratio, and after mixing, mechanical ball milling is dry mixed 8 hours, the pressure compacting in steel grinding tool by mixture with 50MPa.Then pressure embryo is placed in to reaction vessel, on reaction mass with detonator, pass into argon purge reaction vessel to get rid of air wherein, reaction mass is heated to after 200 ℃, continue to pass into argon purge reaction vessel to get rid of now the gas from reaction mass surface desorption, then pass into 8MPa argon gas, reaction mass is continued to be heated to 250 ℃, by detonator initiation reaction, reaction completes within the several seconds.Reaction product is cooled to after room temperature with reaction vessel, takes out from container product, will after surface alumina oxide Impurity removal, obtain product.
Embodiment 3:
29.6:10:33:1.5 takes respectively cupric oxide powder, aluminium powder, iron powder, copper powder in mass ratio, and after mixing, mechanical ball milling is dry mixed 10 hours, the pressure compacting in steel grinding tool by mixture with 50MPa.Then pressure embryo is placed in to reaction vessel, on reaction mass with detonator, pass into argon purge reaction vessel to get rid of air wherein, reaction mass is heated to after 210 ℃, continue to pass into argon gas purge reaction vessel to get rid of now the gas from reaction mass surface desorption, then pass into the argon gas of 4MPa, reaction mass is continued to be heated to 270 ℃, by detonator initiation reaction, reaction completes within the several seconds.Reaction product is cooled to after room temperature with reaction vessel, takes out from container product, will after surface alumina oxide Impurity removal, obtain product.
Claims (2)
1. a preparation method for copper iron immiscible alloy, is characterized in that the method takes respectively cupric oxide powder, aluminium powder, iron powder, copper powder in 29.6:10:4～30:1～30 in mass ratio, and after mixing, mechanical ball milling is dry mixed 6～12 hours, with the pressure of 40～60MPa by the reaction mass mixing compacting in steel die, then pressure embryo is placed in to reaction vessel, on reaction mass top, put detonator briquetting, pass into argon gas purge reaction vessel to get rid of air wherein, reaction mass is heated to after 180 ℃～210 ℃, continue to pass into argon gas purge reaction vessel to get rid of the gas from reaction mass surface desorption, and then pass into the argon gas of 4～8MPa, reaction mass is continued to be heated to 220 ℃～290 ℃, the large calorimetric of emitting by detonator spontaneous reaction in this temperature range carrys out the reaction of initiation reaction material, reaction completes within the several seconds, reaction product is cooled to after room temperature with reaction vessel, takes out from container product, and product surface impurity is removed and obtained product copper iron immiscible alloy, the mixture that described detonator is comprised of permanganate, aluminium powder and sulphur powder, wherein permanganate: aluminium powder: the mass ratio of sulphur powder is 1.0～2.0: 1.5～2.5: 1～2.0.
2. the method for claim 1, is characterized in that detonator briquetting accounts for 1%～3% of reactant total mass.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210240150.0A CN103540779A (en) | 2012-07-12 | 2012-07-12 | Method for preparing copper and iron immiscible alloy |
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| CN201210240150.0A CN103540779A (en) | 2012-07-12 | 2012-07-12 | Method for preparing copper and iron immiscible alloy |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109175315A (en) * | 2018-09-27 | 2019-01-11 | 太原科技大学 | A kind of preparation method of copper and iron immiscible alloy |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109175315A (en) * | 2018-09-27 | 2019-01-11 | 太原科技大学 | A kind of preparation method of copper and iron immiscible alloy |
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Application publication date: 20140129 |