Co base Co-Si-B Nb block amorphous alloy

An amorphous alloy, co-si-b-nb technology, which is applied in the field of Co-based Co-Si-B-Nb bulk amorphous alloys, can solve the randomness of composition selection and complex optimization, and cannot prepare bulk non-crystalline alloys. Crystal and other problems, to achieve the effect of improving the glass forming ability

Inactive Publication Date: 2006-11-29
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art that (1) bulk amorphous cannot be prepared in the quaternary alloy system, (2) there is randomness and optimization complexity in the selection of components, and to develop a new Co-based Co - Si-B-Nb bulk amorphous alloy and determine the formation range of its bulk amorphous alloy and find out the best amorphous composition alloy, especially propose the technical solution of the present invention

Method used

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  • Co base Co-Si-B Nb block amorphous alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment one, (Co 66.2 Si 5.5 B 28.3 ) 0.97 Nb 3 Preparation of Bulk Amorphous Alloy and Its Properties Test

[0032] The first step, the weighing of the composition ratio

[0033] When designing the composition, it is carried out according to the atomic percentage. In the process of weighing the raw materials, the alloy atomic percentage (Co 66.2 Si 5.5 B 28.3 ) 0.97 Nb 3 Converted to weight percent Co 83.9 Si 3.3 B 6.6 Nb 6.2 , weighing the raw materials of pure metal Co, Si, B and Nb with a purity of 99.9% in proportion, for subsequent use;

[0034] In the second step, (Co 66.2 Si 5.5 B 28.3 ) 0.97 Nb 3 Melting of alloy ingots

[0035] Put the mixture of Co, Si, B and Nb according to the above-mentioned composition ratio in the water-cooled copper crucible of the electric arc melting furnace, and use the non-consumable arc melting method to melt under the protection of argon, and first vacuumize to 10 -2 Pa, then filled with argon until the pres...

Embodiment 2

[0040] Embodiment two, (Co 68.6 Si 5.7 B 25.7 ) 0.96 Nb 4 Preparation of Bulk Amorphous Alloy and Its Properties Test

[0041] The first step, the weighing of the composition ratio

[0042] When designing the composition, it is carried out according to the atomic percentage. In the process of weighing the raw materials, the alloy atomic percentage (Co 68.6 Si 5.7 B 25.7 ) 0.96 Nb 4 Converted to weight percent Co 83 Si 3.3 B 5.7 Nb 8 , weighing the raw materials of pure metal Co, Si, B and Nb with a purity of 99.9% in proportion, for subsequent use;

[0043] In the second step, (Co 68.6 Si 5.7 B 25.7 ) 0.96 Nb 4 Melting of alloy ingots

[0044] After vacuuming, the pressure of filling argon is 0.07MPa, and the current density used for melting is 190A / cm 2 , other are all with the second step in the embodiment one (omitted);

[0045] The third step, (Co 68.6 Si 5.7 B 25.7 ) 0.96 Nb 4 Bulk amorphous alloy preparation

[0046] After vacuuming, the pressu...

Embodiment 3

[0049] Embodiment three, (Co 70.6 Si 5.9 B 23.5 ) 0.95 Nb 5 Preparation of Bulk Amorphous Alloy and Its Properties Test

[0050] The first step is to weigh the composition ratio

[0051] When designing the composition, it is carried out according to the atomic percentage. In the process of weighing the raw materials, the alloy atomic percentage (Co 70.6 Si 5.9 B 23.5 ) 0.95 Nb 5 Converted to weight percent Co 82.1 Si 3.3 B 5.0 Nb 9.6 , weighing the raw materials of pure metal Co, Si, B and Nb with a purity of 99.9% in proportion, for subsequent use;

[0052] In the second step, (Co 70.6 Si 5.9 B 23.5 ) 0.95 Nb 5 Melting of alloy ingots

[0053] After vacuuming, the pressure of filling argon is 0.06MPa, and the current density used for melting is 220A / cm 2 , other are all with the second step in the embodiment one (omitted);

[0054] The third step, (Co 70.6 Si 5.9 B 23.5 ) 0.95 Nb 5 Bulk amorphous alloy preparation

[0055] After vacuuming, the press...

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Abstract

The invention relates to Co radical Co-Si-B-Nb block non-crystal alloy that includes Co, Si, B and Nb elements. It adds the fourth element Nb to Co-Si-B ternary system and taking micro alloying. The constituents range are [(Co12Si)1-xBx]1-yNby, and x=23-29at%, y=3-5at.%; the best block non-crystal ally is (Co68.6Si5.7B25.7)0.96Nb4. The method includes the following processes: mixing, taking copper film negative pressure casting adsorbing, the argon gas pressure is 0.06-0.08MPa, fusion melting current density is 180-220A/cm2, and draught head is 0.03+0.005MPa, the diameter of the block non-crystal is 3mm. The advantages of the invention are that it conquers the random of the constituents and develops Co radical Co-Si-B-Nb block non-crystal alloy. It determines the constituents range and the best constituents.

Description

technical field [0001] The invention relates to a Co-based Co-Si-B-Nb bulk amorphous alloy with large amorphous forming ability, high strength and magnetic properties, belonging to the field of new materials. Background technique [0002] Amorphous metal alloys are a class of metals or alloys with short-range order and long-range disorder structures, and they have high comprehensive mechanical properties and unique physical and chemical properties. However, due to the influence of metal or alloy amorphous forming ability (that is, the ability to form amorphous alloy), the preparation of such materials requires a higher cooling rate, and the general critical cooling rate is 10 5 K / s. In the order of cooling speed from high to low, commonly used quenching technologies include: melt atomization, thin film deposition technology, and copper roller quenching strip technology. The material form is often low-dimensional materials such as powder, thin strip, etc., and its applicatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/00C22C1/02B22D18/00
Inventor 董闯王清羌建兵吴江王英敏
Owner DALIAN UNIV OF TECH
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