Biological magnesium alloy with corrosion resistant function and preparation method thereof
A magnesium alloy and corrosion-resistant technology, applied in the field of biomedical material preparation, can solve problems such as delaying the contact time between magnesium alloy and body fluid, and achieve the effects of avoiding galvanic corrosion effect, improving corrosion resistance, and uniform and fine microstructure.
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Embodiment 1
[0029] Using GO powder and Mg-3Al-1Zn alloy powder as raw materials, weigh 0.1g of GO powder (0.8-1.2nm in thickness, 8-15 microns in diameter) and 9.9g of Mg-3Al-1Zn alloy powder in a mass ratio of 1:99 , respectively placed in two 1L beakers, slowly added 250ml of absolute ethanol, and ultrasonically stirred at a speed of 250rad / min for 4h to obtain a GO suspension and a Mg-3Al-1Zn suspension, and the GO suspension was slowly added to Mg - In the 3Al-1Zn suspension, continue to ultrasonically stir at a speed of 250 rad / min for 4 hours to obtain a GO / Mg-3Al-1Zn suspension, which is vacuum filtered and dried for 24 hours (drying temperature is 80-90°C), A uniformly dispersed GO / Mg-3Al-1Zn mixed powder was obtained. GO / Mg-3Al-1Zn alloy was prepared by SLM process under the conditions of 99.999% high-purity argon protection, atmosphere pressure of 5 MPa, spot diameter of 100 μm, laser power of 80 W, and scanning speed of 200 mm / min.
[0030]The test found that GO can keep the s...
Embodiment 2
[0032] Using GO powder (0.8-1.2nm in thickness, 8-15 microns in diameter) and Mg-3Al-1Zn alloy powder as raw materials, weigh 0.08g of GO powder and 9.92g of Mg-3Al-1Zn alloy powder at a mass ratio of 0.8:99.2 , respectively placed in two 1L beakers, slowly added 250ml of absolute ethanol, and ultrasonically stirred at a speed of 250rad / min for 4h to obtain a GO suspension and a Mg-3Al-1Zn suspension, and the GO suspension was slowly added to Mg In the 3Al-1Zn suspension, continue to stir ultrasonically at a speed of 250 rad / min for 4 hours to obtain a GO / Mg-3Al-1Zn suspension. After vacuum filtration and drying for 24 hours, a uniformly dispersed GO / Mg-3Al -1Zn mixed powder. GO / Mg-3Al-1Zn alloy was prepared by SLM process under the conditions of 99.999% high-purity argon protection, atmosphere pressure of 5 MPa, spot diameter of 100 μm, laser power of 80 W, and scanning speed of 200 mm / min.
[0033] The test found that GO can wrap Mg-3Al-1Zn alloy grains to form the second p...
Embodiment 3
[0035] Using GO powder (0.8-1.2nm in thickness, 8-15 microns in diameter) and Mg-3Al-1Zn alloy powder as raw materials, weigh 0.12g of GO powder and 9.88g of Mg-3Al-1Zn alloy at a mass ratio of 1.2:98.8 Put the powder into two 1L beakers respectively, slowly add 250ml of absolute ethanol, and ultrasonically stir at a speed of 250rad / min for 4h to obtain a GO suspension and a Mg-3Al-1Zn suspension, slowly add the GO suspension In the Mg-3Al-1Zn suspension, the GO / Mg-3Al-1Zn suspension was obtained by continuing to ultrasonically stir at a speed of 250 rad / min for 4 hours. After vacuum filtration and drying for 24 hours, a uniformly dispersed GO / Mg- 3Al-1Zn mixed powder. GO / Mg-3Al-1Zn alloy was prepared by SLM process under the conditions of 99.999% high-purity argon protection, atmosphere pressure of 5.1MPa, spot diameter of 120μm, laser power of 80W, and scanning speed of 250mm / min.
[0036] The test found that GO can wrap Mg-3Al-1Zn alloy grains to form the second phase of n...
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