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Low-magnetic-susceptibility beta-type Zr-Nb-Ta series alloy and preparation method thereof

A technology of zr-nb-ta and magnetic susceptibility, which is applied in the field of alloys, can solve problems such as insufficient matching of elastic modulus and affect diagnostic accuracy, and achieve the effects of improving strength, overcoming loosening or fracture of implants, and reducing stress shielding effect

Inactive Publication Date: 2018-06-12
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to overcome the problem that the elastic modulus of β-titanium alloy does not match the elastic modulus of natural human bones and the high magnetic susceptibility human implant materials affect the diagnostic accuracy of nuclear magnetic resonance imaging, the present invention provides a low magnetic susceptibility β type Zr-Nb -Ta series alloy, the weight percentage of the alloy is: niobium 10%, tantalum 10% to 20%, the balance is zirconium and unavoidable impurities and the weight percentage of zirconium is >50%, and the weight percentage of tantalum is preferably 15%, the alloy more closely matches the modulus of elasticity of natural bone and has a lower magnetic susceptibility than beta-titanium alloys

Method used

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  • Low-magnetic-susceptibility beta-type Zr-Nb-Ta series alloy and preparation method thereof
  • Low-magnetic-susceptibility beta-type Zr-Nb-Ta series alloy and preparation method thereof
  • Low-magnetic-susceptibility beta-type Zr-Nb-Ta series alloy and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] like figure 1 , Figure 4 and Figure 5 As shown, the raw material formula: 10% niobium, 10% tantalum, 80% zirconium sponge (both by weight percentage); the purity of niobium, tantalum and zirconium sponge are all above 99%. Weigh the raw materials according to the formula, mix them evenly, put them into a non-consumable vacuum arc melting furnace, and carry out melting under the protection of argon gas. The melting current is 210A during melting, keep for 110s, and cool by circulating cooling water at the bottom of the crucible. . Repeat smelting and cooling for 6 times, and finally cool to room temperature to obtain an alloy ingot with uniform composition. Cut the alloy ingot into samples of different specifications for testing.

[0025] The Zr-Nb-Ta alloy prepared by the above-mentioned preparation method was subjected to a room-temperature compression performance test on a sample with a specification of 5mm×5mm×10mm using a universal testing system. The Young’s ...

Embodiment 2

[0027] like figure 2 , Figure 4 and Figure 5 As shown, the raw material formula: 10% niobium, 15% tantalum, 75% zirconium sponge (both by weight percentage); the purity of niobium, tantalum and zirconium sponge are all above 99%. The preparation method and detection method are the same as in Example 1. During smelting, the smelting current is 200A and kept for 100s. The Young's modulus, yield strength, and compressibility of the samples obtained in this example are 93.25GPa, 714.7MPa, and 72.5%, respectively. figure 2 is the microstructure photograph of the alloy, Figure 4 is the X-ray diffraction pattern of the sample, Figure 5 is the magnetic susceptibility data of the sample.

Embodiment 3

[0029] like image 3 , Figure 4 and Figure 5 As shown, the raw material formula: 10% niobium, 20% tantalum, 70% zirconium sponge (both by weight percentage); the purity of niobium, tantalum and zirconium sponge are all above 99%. The preparation method and detection method are the same as in Example 1. During smelting, the smelting current is 230A, kept for 120s, and smelted repeatedly 5 times. The Young's modulus, yield strength, and compressibility of the sample obtained in this embodiment are 116.32GPa, 946.4MPa, and 84.3GPa respectively. %. image 3 is the microstructure photograph of the alloy, Figure 4 is the X-ray diffraction pattern of the sample, Figure 5 is the magnetic susceptibility data of the sample.

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Abstract

The invention provides a low-magnetic-susceptibility beta-type Zr-Nb-Ta series alloy which comprises the following components in percentage by weight: 10% of Nb, 10% to 20% of Ta, and the balance Zr and inevitable impurities, wherein the weight percentage of Zr is higher than 50% and the optimal weight percentage of Ta is 15%. The low-magnetic-susceptibility beta-type Zr-Nb-Ta series alloy is better matched with the elasticity modulus of natural bone and lower in magnetic susceptibility. The invention further provides a preparation method of the low-magnetic-susceptibility beta-type Zr-Nb-Ta series alloy. According to the preparation method, the content of Nb is set as a critical point of the transformation from the alpha phase to the beta phase; on the above basis, Ta is added as an alloying element; accordingly, metastable beta-Zr can be obtained at room temperature; meanwhile, the solution strengthening effect can be achieved; the shaping and processing properties of the low-magnetic-susceptibility beta-type Zr-Nb-Ta series alloy can be prevented from being influenced when the strength of the low-magnetic-susceptibility beta-type Zr-Nb-Ta series alloy is improved; and furthermore, the corrosion resistance of the low-magnetic-susceptibility beta-type Zr-Nb-Ta series alloy can be enhanced.

Description

technical field [0001] The invention relates to the field of alloys, in particular to a low magnetic susceptibility β-type Zr-Nb-Ta alloy and a preparation method thereof. Background technique [0002] Titanium and its alloys have been widely used in biomedical implant materials, especially β-titanium alloys are the most widely used. However, the elastic modulus of β-titanium alloy does not match the elastic modulus of natural human bones, which may easily cause stress shielding effect, lead to bone resorption around the implant, and cause loosening or fracture of the implant, which is not conducive to bone healing and implantation. The long-term stability of entering the body is easy to cause damage to the human body. In addition, metal materials will produce magnetic field disturbances under strong magnetic fields, and the magnitude of magnetic field disturbances is positively correlated with the magnetic susceptibility of implanted metal materials. The imaging distortio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C16/00C22C1/02
CPCC22C16/00C22C1/02
Inventor 孟庆坤霍宇飞隋艳伟
Owner CHINA UNIV OF MINING & TECH
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