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Mg-Zn-Sr alloy biomaterial of hydroxyapatite coating and preparation method thereof

A technology of hydroxyapatite and mg-zn-sr, which is applied in the field of materials to achieve high specific strength and specific stiffness, good compatibility and low price

Inactive Publication Date: 2010-10-27
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the performance problems of existing clinically used orthopedic rehabilitation materials, the present invention provides a Mg-Zn-Sr alloy biomaterial coated with hydroxyapatite and a preparation method thereof

Method used

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  • Mg-Zn-Sr alloy biomaterial of hydroxyapatite coating and preparation method thereof
  • Mg-Zn-Sr alloy biomaterial of hydroxyapatite coating and preparation method thereof
  • Mg-Zn-Sr alloy biomaterial of hydroxyapatite coating and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0024] The magnesium alloy is smelted, cast into an ingot and then rolled. The rolling method is as follows: the ingot is subjected to preliminary rolling under the condition of 380±10℃, the rolling speed is 18m / min, and the total reduction is 10%; Perform intermediate rolling at 10°C with a rolling speed of 14m / min and a total reduction of 5%; and then perform final rolling at 320±10°C with a rolling speed of 8m / min and a total reduction of 2 %; to obtain a magnesium alloy base plate, the composition of which is Zn2%, Sr0.5% by weight, and the balance is magnesium. The mechanical properties of the magnesium alloy base plate are: elastic modulus 35Gpa, tensile strength 300MPa, elongation 15%, hardness 65HV; metallographic photos such as figure 1 shown.

[0025] The magnesium alloy base plate was placed in a 0.2mol / L sodium hydroxide solution and heat-treated at 80±2°C for 115min.

[0026] The heat-treated magnesium alloy base plate was placed in a 2+ and H 2 PO 4 - In th...

Embodiment 2

[0028] The magnesium alloy is smelted, cast into an ingot and then rolled. The rolling method is as follows: the ingot is subjected to preliminary rolling under the condition of 380±10°C, the rolling speed is 20m / min, and the total reduction is 15%; The intermediate rolling is carried out at 10°C, the rolling speed is 15m / min, and the total reduction is 10%; then the final rolling is carried out at 320±10°C, the rolling speed is 10m / min, and the total reduction is 3 %; to obtain a magnesium alloy base plate, the composition of which is Zn3%, Sr1% by weight, and the balance is magnesium. The mechanical properties of the magnesium alloy base plate are as follows: the elastic modulus is 40Gpa, the tensile strength is 305MPa, the elongation is 16%, and the hardness is 60HV.

[0029] The magnesium alloy base plate was placed in a 0.4vmol / L sodium hydroxide solution and heat-treated at 80±2℃ for 120min.

[0030] The heat-treated magnesium alloy base plate was placed in a 2+ and H ...

Embodiment 3

[0032] The magnesium alloy is smelted, cast into an ingot and then rolled. The rolling method is as follows: the ingot is subjected to preliminary rolling under the condition of 380±10°C, the rolling speed is 22m / min, and the total reduction is 20%; Perform intermediate rolling at 10°C, rolling speed is 16m / min, and total reduction is 15%; then finish rolling at 320±10°C, rolling speed is 12m / min, total reduction is 4 %; to obtain a magnesium alloy base plate, the composition of which is Zn4%, Sr1.5% by weight, and the balance is magnesium. The mechanical properties of the magnesium alloy base plate are as follows: the elastic modulus is 45Gpa, the tensile strength is 310MPa, the elongation is 17%, and the hardness is 63HV.

[0033] The magnesium alloy base plate was placed in a 0.6mol / L sodium hydroxide solution and heat-treated at 80±2°C for 125min.

[0034] The heat-treated magnesium alloy base plate was placed in a 2+ and H 2 PO 4 - In the solution, the molar ratio of...

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Abstract

The invention discloses an Mg-Zn-Sr alloy biomaterial of a hydroxyapatite coating, which belongs to the technical field of materials. The material consists of a magnesium alloy matrix and the hydroxyapatite coating, wherein the magnesium alloy matrix comprises the following components in percentage by weight: 2 to 6 percent of Zn, 0.5 to 2 percent of Sr and the balance of magnesium; the hydroxyapatite coating comprises the following components in percentage by weight: 1.8 to 5.4 percent of Zn, 0.45 to 1.8 percent of Sr, 5 to 14.95 percent of hydroxyapatite and the balance of magnesium; and the thickness of the hydroxyapatite coating is 0.1 to 0.3 micron. The HA biological coating is deposited on the alloy surface by a reasonable process; and close to the human skeleton, the biomaterial has high specific strength and specific stiffness, can be automatically degraded and absorbed by the human body, and does not produce long-term stimulation effect on an organism.

Description

technical field [0001] The invention belongs to the technical field of materials, and particularly relates to a hydroxyapatite-coated Mg-Zn-Sr alloy biological material and a preparation method thereof. Background technique [0002] At present, the clinical materials used for orthopaedic rehabilitation involve traditional metal materials (such as stainless steel, cobalt-chromium-molybdenum alloy, titanium alloy), as well as inorganic materials and polymer materials. The clinical application of polymer materials has problems such as low strength, rigidity and stability, and there are obvious deficiencies in the treatment of compact bone, especially in the treatment of fractures in weight-bearing parts, vertebral bodies, pelvis, long tubular bones, and refractures. , malignant tumor infection and patients with systemic metabolic diseases, etc. Inorganic materials have fallen into the dilemma of poor mechanical compatibility in clinical applications, and are prone to brittle f...

Claims

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Application Information

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IPC IPC(8): A61L31/08A61L31/02C22C23/04C22C1/00C25D9/12
Inventor 管仁国崔彤陈礼清赵占勇李雪孙小平
Owner NORTHEASTERN UNIV
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