CN1187462C - Preparation method of large nano crystal nickel aluminium intermetallic compound - Google Patents
Preparation method of large nano crystal nickel aluminium intermetallic compound Download PDFInfo
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- CN1187462C CN1187462C CNB021476500A CN02147650A CN1187462C CN 1187462 C CN1187462 C CN 1187462C CN B021476500 A CNB021476500 A CN B021476500A CN 02147650 A CN02147650 A CN 02147650A CN 1187462 C CN1187462 C CN 1187462C
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Abstract
The present invention discloses a method for preparing a large nanocrystalline nickel-aluminum intermetallic compound. The present invention adopts powdery hybrid reaction reactants containing 65 to 90 wt% of nickel and 10 to 35 wt% of aluminum to prepare the large nanocrystalline nickel-aluminum intermetallic compound at the temperature of 350 to 450 DEG C. Compared with the existing method for preparing nanocrystalline materials, the present invention has simple process, simple equipment and cost reduction; the prepared material has large size, favorable microscopic organization structure and favorable mechanical property.
Description
Background technology
The present invention has narrated a kind of preparation method of bulk nano-crystal nickel Al intermetallic.
Technical field
The nanometer of material grains size will make its mechanical property be improved significantly, and for example nanometer is expected to solve ubiquitous room temperature fragility problem in intermetallic compound, the stupalith.At present the method for existing preparation nanocrystalline material mainly contain cold pressing, amorphous crystallization method, hot pressed sintering, galvanic deposit, deformation method.These methods or from the block materials to the nano particle high energy consumption from the nano particle to the nanocrystalline material, expensive process or only be applicable to several thin-film materials and can't prepare the technology of bulk nanocrystalline material again.So far also do not have a kind of low-cost simple process that obtains the bulk nanocrystalline material, this problem seriously hampers the application of nanocrystalline material.
Summary of the invention
The objective of the invention is to avoid the deficiencies in the prior art, adopt the low-cost preparation of the synthetic method of fusion of burning bulk nano-crystal nickel Al intermetallic.Thereby it is simple to have formed a kind of technology, and required equipment is simple, with low cost, the preparation method of high-performance bulk nanocrystalline material with short production cycle.
The present invention adopts the synthetic method of fusion of burning, by the design of material synthetic route, has found the prescription and the technological process thereof of preparation bulk nano-crystal nickel aluminum from raw material.
Intermetallic Ni-Al compound preparation method of the present invention comprises: taking by weighing mass percent respectively is nickel 65-90%, the powdered reactant of aluminium 8-28%, under the pressure of 10-50MPa with material compacting in mould.The mould that reaction mass is housed is placed reaction vessel, use the inert gas purge reaction vessel, material is heated to 300 ℃-350 ℃, and in this temperature insulation; Get rid of from container from the gas of reaction mass surface desorption, feed the 5-10MPa rare gas element again, material is continued to be heated to 380-450 ℃, under this temperature, pass through the detonator initiation reaction, being reflected at the several seconds finishes, and detonator accounts for the 5-30% of the weight percentage of total reaction material.Material is cooled to room temperature with reaction vessel, takes out material from container to room temperature.Through observing, analyze, obtained the purity height, the microtexture densification, the thickness direction size is greater than the nano-crystal nickel aluminum of 3mm.
Detonator of the present invention is a vitriol, aluminium powder, sulphur powder, the mixture that manganate is formed.
Compare with traditional method for preparing nanocrystalline material preparation technology and required equipment of preparation method of the present invention is simple, and preparation cost obviously reduces.The material of this method preparation has purity height, dense structure and material and has high abrasion resistance, flexural strength and hardness.
The hardness of material, flexural strength and wear rate are listed in table 1.
The measurement of hardness condition is that load 1000g loads time length 5s.Adopt three point bending test to measure the flexural strength of material, specimen size is 30 * 3 * 3mm, and span is 25mm, and the pressure head speed of moving down is 1mm/min.Wearing test is carried out on ball-disc type SRV micro-moving frictional wear trier, coils to be material of the present invention, is of a size of 19 * 19 * 3mm, and antithesis is the G Cr15 steel ball of Φ 10mm.Load 20N, amplitude 1mm, frequency 25Hz, 30 minutes runtime.
Material hardness, flexural strength and the wear rate of table 1 the present invention preparation
| Hardness (GPa) | Flexural strength (MPa) | Wear rate (10 -14m 3.N -1. m -1) | |
| The nickel aluminum | 4.5-6.5 | 900-1300 | 5.23-7.50 |
In addition, the plastisied dispersion of the material property of the present invention's preparation is not more than 10%, illustrative material performance favorable reproducibility.
Embodiment
Embodiment 1:
Taking by weighing weight percentage by prescription is nickel: 80, and aluminium: 20 powdered reacting material ball milling dry blending 5 hours, bank are put in and use the compacting of 38MPa pressure in the mould.The mould that reaction mass is housed is placed reaction vessel,, reaction mass is heated to 320 ℃ with rare gas element purge reaction vessel, and in this temperature insulation.Discharge the gas of desorption then from container, feed the 6MPa rare gas element again, material is continued to be heated to 400 ℃, and under this temperature, pass through the detonator initiation reaction.Detonator account for the total reaction material weight percentage 15%, the mixture that detonator is made up of vitriolate of tartar, aluminium powder, sulphur powder, potassium permanganate, their weight ratio is 1: 1: 1: 1.Prepared material was cooled to room temperature with reaction vessel after reaction was finished, and made the nano-crystal nickel aluminum of thickness direction size greater than 3mm.
Embodiment 2:
Taking by weighing weight percentage by prescription is nickel: 75, and aluminium: 25 powdered reacting material ball milling dry blending 10 hours, bank are put in and use the compacting of 45MPa pressure in the mould.The mould that reaction mass is housed is placed reaction vessel,, reaction mass is heated to 350 ℃ with rare gas element purge reaction vessel, and in this temperature insulation.Discharge from container then from the gas of reaction mass desorption, feed the 9MPa rare gas element again, material is continued to be heated to 435 ℃, and under this temperature, pass through the detonator initiation reaction.Detonator account for the total reaction material weight percentage 25%, the mixture that detonator is made up of vitriolate of tartar, aluminium powder, sulphur powder, potassium permanganate, their weight ratio is 1: 2: 1: 1.Prepared material was cooled to room temperature with reaction vessel after reaction was finished, and made the nano-crystal nickel aluminum of thickness direction size greater than 3mm.
Claims (1)
1, a kind of preparation method of bulk nano-crystal nickel Al intermetallic, it is characterized in that comprising that taking by weighing mass percent respectively is nickel 65-90%, the powdered reactant of aluminium 10-35%, reaction mass ball milling do to mix 6-12 hour, under the pressure of 20-50MPa with material compacting in mould; The mould that reaction mass is housed is placed reaction vessel, to get rid of air wherein, material is heated to 300-350 ℃ with the inert gas purge reaction vessel, and in this temperature insulation; The gas of getting rid of desorption from container feeds the 5-8MPa rare gas element again, and material is continued to be heated to 380-450 ℃, passes through the detonator initiation reaction under this temperature; Detonator accounts for the 10-30% of the weight percentage of total reaction material, and detonator is by vitriol, aluminium powder, sulphur powder, the mixture that manganate is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021476500A CN1187462C (en) | 2002-10-22 | 2002-10-22 | Preparation method of large nano crystal nickel aluminium intermetallic compound |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021476500A CN1187462C (en) | 2002-10-22 | 2002-10-22 | Preparation method of large nano crystal nickel aluminium intermetallic compound |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1410571A CN1410571A (en) | 2003-04-16 |
| CN1187462C true CN1187462C (en) | 2005-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021476500A Expired - Fee Related CN1187462C (en) | 2002-10-22 | 2002-10-22 | Preparation method of large nano crystal nickel aluminium intermetallic compound |
Country Status (1)
| Country | Link |
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| CN (1) | CN1187462C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871061A (en) * | 2010-07-07 | 2010-10-27 | 哈尔滨工业大学 | Preparation method of massive nanocrystalline nickel aluminum alloy |
| CN106834761B (en) * | 2016-12-31 | 2018-04-13 | 西安交通大学青岛研究院 | A kind of vacuum smelting method of intermetallic Ni-Al compound |
| CN106834762B (en) * | 2016-12-31 | 2018-09-28 | 西安交通大学青岛研究院 | A kind of vacuum melting device of intermetallic Ni-Al compound |
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2002
- 2002-10-22 CN CNB021476500A patent/CN1187462C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1410571A (en) | 2003-04-16 |
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