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A method for determining the relationship between microstructure and damping performance of nbb damping alloy system

A damping alloy and relation determination technology is applied in the field of preparing β-phase NbxB high damping materials, which can solve problems such as the deterioration of damping performance, and achieve the effects of improved controllability and accuracy, simple and economical alloy preparation, and good damping performance.

Active Publication Date: 2015-09-30
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the limitations of the mechanism of the high damping alloy developed through dislocation movement and other mechanisms, the damping performance deteriorates significantly.

Method used

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  • A method for determining the relationship between microstructure and damping performance of nbb damping alloy system
  • A method for determining the relationship between microstructure and damping performance of nbb damping alloy system
  • A method for determining the relationship between microstructure and damping performance of nbb damping alloy system

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Embodiment Construction

[0021] Nb-xB(at%) (x=0.15,0.3,0.45,0.5) alloys were prepared by powder metallurgy.

[0022] 1. The weighing of raw materials is carried out by using high-purity Nb rods and high-purity B powder according to the ratio of 25Nb-xB (at%) (x=0.15, 0.3, 0.45, 0.5).

[0023] 2. Compress the high-purity B powder into tablets with a pressure of 8 MPa and a time of 3 minutes.

[0024] 3. Place the prepared material in a vacuum melting furnace for melting, and ensure that the sample is completely melted 5 times to ensure uniformity.

[0025] 4. Sample processing: Cut the alloy ingot by wire electric discharge machine to obtain XRD sample, 20.0mm×5.0mm×1.0mm DMA test sample and 3mm square block sample for phase analysis and microstructure observation.

[0026] 5. Sample processing and testing: Choose water sandpaper with different roughness, and grind from coarse to fine (grain size 360-2000), to obtain XRD diffraction samples, damping samples and compression samples that meet the test r...

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Abstract

The invention discloses a determination method for a relationship between the structure and the damping performance of an NbB damping alloy system. The method comprises the following steps weighing a high purity Nb rod and high purity B powder according to proportion expressed by 25Nb-xB(at%) (wherein x is equal to 0.15, 0.3, 0.45 or 0.5); tabletting the high purity B powder; carrying out melting; preparing a beta-phase NbxB high damping material; and subjecting prepared samples to XRD, DMA, OM, SEM and TEM testing, analyzing results and establishing the relationship between the structure and the damping performance. The invention provides the visual relationship between the high damping alloy performance and the structure of the novel system, so ideas and methods are provided for estimation of alloy damping performance through observation of microstructures in the future.

Description

Technical field: [0001] The invention prepares the β-phase NbxB high damping material through a smelting method. It involves preparing a new system of high damping material that is easy to prepare and has good performance by smelting method, analyzes its structure and performance and establishes a certain relationship between the two. The content of B in this invention is between 0.15-0.5 (at%), taking NbxB (x=0.15,0.3,0.45,0.5) (at%) as an example. Background technique: [0002] With the rapid development of modern industry, all kinds of mechanical equipment require higher precision and longer service life, while vibration and noise will seriously affect the precision and service life of the equipment. For example, as a super-high-speed flying aircraft, a fighter jet will generate huge vibration energy when its engine runs at high speed, which will accelerate the deterioration of the performance of the engine and even lead to the deterioration of the performance of other p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C27/02C22C1/02
Inventor 殷亮
Owner TIANJIN UNIV