CN105316515A - Preparation method for biological porous magnesium - Google Patents
Preparation method for biological porous magnesium Download PDFInfo
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- CN105316515A CN105316515A CN201510712585.4A CN201510712585A CN105316515A CN 105316515 A CN105316515 A CN 105316515A CN 201510712585 A CN201510712585 A CN 201510712585A CN 105316515 A CN105316515 A CN 105316515A
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Abstract
The invention provides a preparation method for porous magnesium alloy. The preparation method comprises the following steps that (A) stainless steel wires are woven to obtain a stainless steel wire woven body; (B) molten magnesium alloy is poured on the stainless steel wire woven body obtained in the step (A) to obtain a magnesium alloy cast body; and (C) the magnesium alloy cast body obtained in the step (B) is soaked in an etchant solution to obtain the porous magnesium alloy, the etchant solution is composed of mixed acid and water, and the mixed acid is composed of HF, H2SO4 and HNO3. According to the preparation method, a method that weaving and chemical etching are combined is adopted for preparing the porous magnesium alloy, and the problem that harmful substances remain due to sintering type methods such as a powder metallurgic method is solved; meanwhile, the size and shape of pores of the porous magnesium alloy prepared through the method are easy to control, and stainless steel waste can be better recycled. Besides, the preparation method for the porous magnesium alloy is high in processing efficiency and the quality control is facilitated.
Description
Technical field
The invention belongs to biomaterial preparing technical field, particularly relate to a kind of preparation method of biological stephanoporate magnesium.
Background technology
Metal current internal fixation material is assisting to repair or replace in ill or impaired osseous tissue still to play a significant role.The high specific strength of metal internal fixation material and the feature of Resisting fractre toughness, make it be applicable to becoming stationary installation.Conventional orthopaedics internal fixation material comprises stainless steel, titanium, cobalt-chromium alloy etc.But these metallic biomaterials, in corrosion or wear process, may discharge toxic metal ions and/or particle, cause cascade of response of inflammation, cause the minimizing of biocompatibility, cause bone to dissolve, even insert thing failure, and its Young's modulus can not mate very well with natural bone tissue, form stress-shielding effect, inhibit new bone formation and reconstruction, reduce the stability inserting thing, also need to be removed by second operation, add misery and the medical expense of patient.In addition, its degradation speed is difficult to control, and degraded product easily causes aseptic inflammation.
Magnesium is a kind of light metal, and density is about 1.74g/cm
3(density is only 2/3 of aluminium alloy, 1/4 of steel), Resisting fractre Toughness Ratio pottery is large many, compared with inserting thing with other conventional metals, Young's modulus and specific tenacity are closer to nature bone, magnesium ion can also stimulate generation, the induced osteogenesis of fracture end os osseum scab, promotes union of fracture, and stimulates Chondrogenesis.In addition, magnesium is the structure of the cofactor of many enzymes, Absorbable organic halogens DNA and RNA.Therefore, magnesium and alloy thereof insert thing as the orthopaedics of degradable, bearing load, through 12 ~ 18 weeks knitting phases, still mechanical integrity can be kept, finally replace by natural fabric, the osteoinductive that magnesium alloy is good, degradability, biocompatibility, make it have the potentiality becoming orthopaedics internal fixation material.
Porous magnesium alloy is that one is similar to foamed metal, and it has the characteristic of high volume porosity rate, low elastic modulus and high skin friction coefficient, is a kind of bone alternate material preferably.In mechanical property, the Young's modulus of porous magnesium alloy, fatigue resistance, frictional coefficient are close with normal bone tissues; In biological nature, porous magnesium alloy shows good biocompatibility, erosion resistance, self-bone grafting and regenerative power, and is expected to catch up with and surpass other metallic substance applied, thus becomes the new developing direction of bone tissue engineer.
At present, the comparatively ripe preparation method of porous magnesium alloy is powder metallurgic method, powder metallurgic method is the mixing by magnesium powder and whipping agent uniform and complete, the mixed powder of gained first adopts rolling equipressure working method to make fine and close prefabricated section, then prefabricated section is carried out heat temperature raising, make whipping agent decompose, the gas of release makes magnesium prefabricated section expand, and forms vesicular structure.But whipping agent has a large amount of residue in foam aluminum alloy after decomposes, produce corrosion to magnesium matrix, the gas of whipping agent decomposes generation is simultaneously as CO
2deng also easily and magnesium matrix generation chemical reaction, block through hole.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of porous magnesium alloy, preparation method provided by the invention does not have the residual of objectionable impurities, and the character of magnesium alloy can not be made to change.
The invention provides a kind of preparation method of porous magnesium alloy, comprise the following steps:
A) Stainless Steel Wire is woven, obtain Stainless Steel Wire knitted body;
B) by the magnesium alloy pouring of fusing in described steps A) on the stainless steel knitted body that obtains, obtain magnesium alloy cast body;
C) by described step B) in magnesium alloy cast body immerse in etchant solution, obtain porous magnesium alloy, described etchant solution comprises mixing acid and water, and described mixing acid comprises HF, H
2sO
4, HNO
3.
Preferably, the material of described Stainless Steel Wire comprises one or more in chromium-nickel-manganese austenitic stainless steel, chromium-austenitic stainless steel, ferrito-martensite stainless steel, heat-resisting Chrome metal powder stainless steel and martensitic precipitation.
Preferably, the diameter of described Stainless Steel Wire is 50 ~ 550 μm.
Preferably, described magnesium alloy comprises one or more in magnalium series alloy, magnesium zinc zirconium series alloy, magnesium zinc series alloy and magnesium calcium series alloy.
Preferably, described magnalium series alloy comprises one or more in Mg-Al-Zn alloy, Mg-Al-Mn alloy, Mg-Al-RE alloy and Mg-Al-RE-Li alloy;
Described magnesium zinc series alloy comprises one or more in Mg-Zn-Zr alloy, Mg-Zn alloy, Mg-Zn-Mn alloy, Mg-Zn-Mn-Ca alloy and Mg-Zn-Zr-Y alloy.
Preferably, in described mixing acid, the volume fraction of described HF is 50 ~ 60%; H
2sO
4volume fraction be 5 ~ 15%; HNO
3volume fraction be 35 ~ 45%.
Preferably, the volume ratio of described mixing acid and water is (2 ~ 5): 1.
Preferably, described mixing acid and described step B) volume ratio of magnesium alloy cast body that obtains is (1.5 ~ 100): 1.
Preferably, described step C) in the temperature of etchant solution be 20 ~ 40 DEG C.
Preferably, described step B) in be cast in shielding gas atmosphere under carry out.
The invention provides a kind of preparation method of porous magnesium alloy, comprise the following steps: A) Stainless Steel Wire is woven, obtain Stainless Steel Wire knitted body; B) by the magnesium alloy pouring of fusing in described steps A) on the stainless steel knitted body that obtains, obtain magnesium alloy cast body; C) by described step B) in magnesium alloy cast body immerse in etchant solution, obtain porous magnesium alloy, described etchant solution comprises mixing acid and water, and described mixing acid comprises HF, H
2sO
4, HNO
3.The method that the present invention adopts braiding and chemical corrosion to combine prepares porous magnesium alloy, not only solve the problem that objectionable impurities that the sintering such as powder metallurgic method class methods bring is residual, simultaneously, in present method, the pore dimension of porous magnesium alloy and shape easily control, and, be conducive to reclaiming stainless steel waste material.
In addition, preparation method's working (machining) efficiency provided by the invention high, be conducive to quality control.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
Fig. 1 is the schematic diagram weaving stratiform Stainless Steel Cloth in the embodiment of the present invention;
Fig. 2 is the schematic diagram in the embodiment of the present invention, Stainless Steel Cloth being piled into Stainless Steel Wire knitted body;
Fig. 3 is the angle that in the embodiment of the present invention, Stainless Steel Wire interweaves is not the schematic diagram at right angle;
The mode of connection at Fig. 4 is the Stainless Steel Wire intertexture angle in the present invention when being right angle point of crossing place;
Fig. 5 is the schematic diagram of the uneven Stainless Steel Wire knitted body in embodiment of the present invention mesoporosity;
Fig. 6 is the schema that the embodiment of the present invention 1 prepares porous magnesium alloy;
Fig. 7 is the preparation process schematic diagram that the embodiment of the present invention 1 prepares porous magnesium alloy.
Embodiment
The invention provides a kind of preparation method of porous magnesium alloy, comprise the following steps:
A) Stainless Steel Wire is woven, obtain Stainless Steel Wire knitted body;
B) by the magnesium alloy pouring of fusing in described steps A) on the stainless steel knitted body that obtains, obtain magnesium alloy cast body;
C) by described step B) in magnesium alloy cast body immerse in etchant solution, obtain porous magnesium alloy, described etchant solution comprises mixing acid and water, and described mixing acid comprises HF, H
2sO
4, HNO
3.
There is no the residual of objectionable impurities in the porous magnesium alloy that preparation method provided by the invention obtains, and pore dimension and shape are easy to control.
Stainless Steel Wire weaves by the present invention, obtains Stainless Steel Wire knitted body.Stainless Steel Wire is preferably first woven into laminate structure by the present invention, and then the Stainless Steel Cloth of stratiform is stacked accumulation obtains Stainless Steel Wire knitted body.Specifically can see Fig. 1 ~ 2, Fig. 1 is the schematic diagram weaving stratiform Stainless Steel Cloth in the embodiment of the present invention; Fig. 2 is the schematic diagram in the embodiment of the present invention, Stainless Steel Cloth being piled into Stainless Steel Wire knitted body.In Fig. 3,10 represent individual layer knitted body, and 10a, 10b, 10c are respectively the Stainless Steel Wire in the different hexagon in the adjacent position of knitted body, and e.g., 10a represents the limit of below hexagon weave body, and 10b represents the limit of the hexagon weave body at place to the right, top; 10c represents the limit that in middle establishment body, hexagon keeps left.The present invention first can set up the geometric model of described Stainless Steel Wire knitted body, and calculates, and then weaves Stainless Steel Wire according to the model calculated.In the present invention, describedly set up geometric model, set up software that geometric model uses, establishment equipment that the method for braiding and braiding use is the technique means that those skilled in the art commonly use.
Concrete, the present invention preferably adopts braiding machine to be woven by Stainless Steel Wire, can be interweaved between silk and silk degree in a vertical angle, also other angle can be become, in the present invention, when Stainless Steel Wire carries out fibrage, formed at the point of crossing place of Stainless Steel Wire and connect, this connection directly can be wound around by Stainless Steel Wire and be formed, and also can directly directly be bundled by the Stainless Steel Wire of segment.As shown in figs. 34, Fig. 3 is the angle that in the embodiment of the present invention, Stainless Steel Wire interweaves is not the schematic diagram at right angle, the mode of connection at Fig. 4 is the Stainless Steel Wire intertexture angle in the present invention when being right angle point of crossing place, wherein, a in Fig. 4 is for be directly wound by Stainless Steel Wire, and b is directly bundled by the Stainless Steel Wire of segment to be formed.The present invention also obtains the different Stainless Steel Wire knitted body of hole by the braiding of different preparing methods, the porous magnesium alloy with different porosities and pore structure can be obtained thus, as shown in Figure 5, Fig. 5 is the schematic diagram of the uneven Stainless Steel Wire knitted body in embodiment of the present invention mesoporosity, in Fig. 5, black ball in the large ball of black in a figure and b figure all represents the hole after being full of by magnesium alloy, and that embodies to make uneven hole in porous magnesium alloy is more obvious, it is drawn respectively.
In the present invention, the material of described Stainless Steel Wire preferably includes one or more in chromium-nickel-manganese austenitic stainless steel, chromium-austenitic stainless steel, ferrito-martensite stainless steel, heat-resisting Chrome metal powder stainless steel and martensitic precipitation, concrete, as 200 series stainless steels, 300 series stainless steels, 400 series stainless steels, 500 series stainless steels and 600 series stainless steels; The diameter of described Stainless Steel Wire is preferably 50 ~ 550 μm, is more preferably 100 ~ 500 μm, most preferably is 150 ~ 450 μm, is the most preferably 200 ~ 400 μm.The source of the present invention to described Stainless Steel Wire does not have special restriction, adopts conventional commercial goods.
After obtaining stainless steel knitted body; the present invention by fusing magnesium alloy pouring on described stainless steel knitted body; obtain magnesium alloy cast body; the present invention preferably melts magnesium alloy ingot under shielding gas atmosphere; obtain the magnesium alloy melted; then, under shielding gas atmosphere, by the magnesium alloy pouring of described fusing on described stainless steel knitted body, magnesium alloy cast body is obtained.In the present invention, described magnesium alloy preferably includes one or more in magnalium series alloy, magnesium zinc zirconium series alloy, magnesium zinc series alloy and magnesium calcium series alloy; Described magnalium series alloy preferably includes one or more in Mg-Al-Zn alloy, Mg-Al-Mn alloy, Mg-Al-RE alloy and Mg-Al-RE-Li alloy; Described magnesium zinc series alloy preferably includes one or more in Mg-Zn-Zr alloy, Mg-Zn alloy, Mg-Zn-Mn alloy, Mg-Zn-Mn-Ca alloy and Mg-Zn-Zr-Y alloy; Concrete, the trade mark can be adopted to be the magnesium alloy of AZ31, AZ91, AM60, AE21, LAE442, WE43, ZK60, Mg-Zn, Mg-Zn-Mn, Mg-Zn-Mn-Ca, Mg-Zn-Zr-Y or Mg-Ca.Described shielding gas preferably includes one or more in nitrogen, helium, neon, argon gas, Krypton and xenon.In the present invention, the fusing of described magnesium alloy and cast are the method that those skilled in the art commonly use.
After obtaining magnesium alloy cast body, described magnesium alloy cast body immerses in etchant solution by the present invention, obtains porous magnesium alloy.In the present invention, described etchant solution comprises mixing acid and water, and described mixing acid comprises HF, H
2sO
4, HNO
3, in described mixing acid, the volume fraction of described HF is preferably 50 ~ 60%, is more preferably 52 ~ 58%, most preferably is 55 ~ 57%; Described H
2sO
4volume fraction be preferably 5 ~ 15%, be more preferably 8 ~ 13%, most preferably be 10 ~ 12%; Described HNO
3volume fraction be preferably 35 ~ 45%, be more preferably 38 ~ 42%, most preferably be 40 ~ 41%.In the present invention, described water is preferably distilled water, and the volume ratio of described mixing acid and water is preferably (2 ~ 5): 1, is more preferably (2.5 ~ 4.5): 1, most preferably is (3 ~ 4): 1; The volume ratio of described mixing acid and described magnesium alloy is preferably (1.5 ~ 100): 1, is more preferably (3 ~ 95): 1, most preferably is (5 ~ 90): 1.The temperature of described etchant solution is preferably 20 ~ 40 DEG C, is more preferably 25 ~ 35 DEG C.The present invention adopts the acid of specified proportion to mix, the mixing acid obtained only can corrode the Stainless Steel Wire of magnesium alloy cast body inside, and do not corrode magnesium alloy, thus obtain the magnesium alloy with vesicular structure, the present invention preferably applies ultrasonic wave and constantly vibrates in corrosion process.In corrosion process, have bubble constantly discharge, treat bubble not when release, Stainless Steel Wire and oxide compound thereof are completely removed, and stopped reaction obtains porous magnesium alloy.
After obtaining porous magnesium alloy, described porous magnesium alloy preferably cleans by the present invention in distilled water, applies ultrasonic wave simultaneously and vibrates, to remove residual mixing acid.Dry up through cold wind after cleaning and namely obtain porous magnesium alloy finished product.
The present invention tests the intensity of the porous magnesium alloy obtained according to the method in ASTME8 standard, result shows, in the present invention, the compressive strength of porous magnesium alloy is 7 ~ 16MPa.
The present invention tests the Young's modulus of the porous magnesium alloy obtained according to the method in ASTME8 standard, result shows, the Young's modulus 0.4 ~ 1.5GPa of porous magnesium alloy in the present invention.
The invention provides a kind of preparation method of porous magnesium alloy, comprise the following steps: A) Stainless Steel Wire is woven, obtain Stainless Steel Wire knitted body; B) by the magnesium alloy pouring of fusing in described steps A) on the stainless steel knitted body that obtains, obtain magnesium alloy cast body; C) by described step B) in magnesium alloy cast body immerse in etchant solution, obtain porous magnesium alloy, described etchant solution comprises mixing acid and water, and described mixing acid comprises HF, H
2sO
4, HNO
3.The method that the present invention adopts braiding and chemical corrosion to combine prepares porous magnesium alloy, not only solve the problem that objectionable impurities that the sintering such as powder metallurgic method class methods bring is residual, simultaneously, in present method, the pore dimension of porous magnesium alloy and shape easily control, and, be conducive to reclaiming stainless steel waste material.
In addition, preparation method's working (machining) efficiency provided by the invention high, be conducive to quality control.
In order to further illustrate the present invention, below in conjunction with embodiment, the preparation method to a kind of porous magnesium alloy provided by the invention is described in detail, but can not be understood as limiting the scope of the present invention.
Embodiment 1
The preparation process of the present embodiment is with reference to Fig. 6 ~ 7, and Fig. 6 is the schema that the embodiment of the present invention 1 prepares porous magnesium alloy, and Fig. 7 is the preparation process schematic diagram that the embodiment of the present invention 1 prepares porous magnesium alloy, in Fig. 7, and 1-Stainless Steel Wire; The shape of one deck Stainless Steel Wire that 2-is compiled into, 3 another shape being compiled into one deck; 4-pours into a mould; It is medium to be cast that 5-Stainless Steel Wire knitted body is placed on crucible; 6-is poured the magnesium alloy containing Stainless Steel Wire knitted body; 7-is placed in mixing acid containing the magnesium alloy of stainless steel knitted body and carries out ultrasonic removal; The porous magnesium alloy that 8-obtains.
Employing diameter is the 300 series stainless steel steel wires (chromium-austenitic stainless steel) of φ 50 μm, first Stainless Steel Wire is woven into the Stainless Steel Cloth of stratiform on braiding machine according to the method shown in Fig. 1 and Fig. 2, again it is piled up layer by layer, obtaining stainless steel knitted body, is vertical angle between Stainless Steel Wire and silk.
Under Ar gas atmosphere, be the Mg-Al-Zn series magnesium alloy fusing of AZ31 by the trade mark, be cast on above-mentioned stainless steel knitted body, obtain magnesium alloy cast body.
Immersed in etchant solution by magnesium alloy cast body, in etchant solution, the volume ratio of mixing acid and distilled water is 2, in mixing acid the volume fraction of HF be 50%, H
2sO
4volume fraction be 5%, HNO
3volume fraction be 45%.Corrosion temperature is 20 DEG C.Wherein bubble is the instruction that etchant solution carries out with Stainless Steel Wire and oxide compound thereof reacting, and when bubble is not when producing, Stainless Steel Wire and oxide compound thereof are completely removed.
Porous magnesium alloy after corrosion is placed in distilled water and cleans, and applies ultrasonic wave and vibrate, obtain porous magnesium alloy.The porous magnesium alloy mean pore size obtained is 51 μm, and porosity is 40%.There is no the residual of objectionable impurities.
The present invention adopts the method in ASTME8 standard to test the compressive strength of the porous magnesium alloy that the present embodiment obtains, and result shows, the porous magnesium alloy compressive strength that the present embodiment obtains is 16MPa.
The present invention tests the Young's modulus of the porous magnesium alloy obtained according to the method in ASTME8 standard, result shows, the Young's modulus 1.3Gpa of the porous magnesium alloy that the present embodiment obtains.
Embodiment 2
Modeling is carried out according to the structure of the upper figure in Fig. 3, employing diameter is the 600 series stainless steel steel wires (martensitic precipitation) of φ 150 μm, first Stainless Steel Wire is woven into the Stainless Steel Cloth of stratiform on braiding machine according to the method shown in Fig. 1 and Fig. 2, again it is piled up layer by layer, obtain stainless steel knitted body.
Under Ar gas atmosphere, be the Mg-Zn-Zr series magnesium alloy fusing of ZK60 by the trade mark, be cast on above-mentioned stainless steel knitted body, obtain magnesium alloy cast body.
Immersed in etchant solution by magnesium alloy cast body, in etchant solution, the volume ratio of mixing acid and distilled water is 3, in mixing acid the volume fraction of HF be 55%, H
2sO
4volume fraction be 10%, HNO
3volume fraction be 35%.Corrosion temperature is 30 DEG C.Wherein bubble is the instruction that etchant solution carries out with Stainless Steel Wire and oxide compound thereof reacting, and when bubble is not when producing, Stainless Steel Wire and oxide compound thereof are completely removed.
Porous magnesium alloy after corrosion is placed in distilled water and cleans, and applies ultrasonic wave and vibrate, obtain porous magnesium alloy.The porous magnesium alloy mean pore size obtained is 153 μm, and porosity is 50%.There is no the residual of objectionable impurities.
The present invention adopts the method in ASTME8 standard to test the compressive strength of the porous magnesium alloy that the present embodiment obtains, and result shows, the porous magnesium alloy compressive strength that the present embodiment obtains is 14MPa.
The present invention tests the Young's modulus of the porous magnesium alloy obtained according to the method in ASTME8 standard, result shows, the Young's modulus 0.8GPa of the porous magnesium alloy that the present embodiment obtains.
Embodiment 3
Modeling is carried out according to the structure of a figure in Fig. 5, employing diameter is the 600 series stainless steel steel wires (martensitic precipitation) of φ 300 μm, first Stainless Steel Wire is woven into the Stainless Steel Cloth of stratiform on braiding machine according to the method shown in Fig. 1 and Fig. 2, again it is piled up layer by layer, obtain stainless steel knitted body.
Under Ar gas atmosphere, be the Mg-Zn-Zr series magnesium alloy fusing of ZK60 by the trade mark, be cast on above-mentioned stainless steel knitted body, obtain magnesium alloy cast body.
Immersed in etchant solution by magnesium alloy cast body, in etchant solution, the volume ratio of mixing acid and distilled water is 3, in mixing acid the volume fraction of HF be 55%, H
2sO
4volume fraction be 10%, HNO
3volume fraction be 35%.Corrosion temperature is 30 DEG C.Wherein bubble is the instruction that etchant solution carries out with Stainless Steel Wire and oxide compound thereof reacting, and when bubble is not when producing, Stainless Steel Wire and oxide compound thereof are completely removed.
Porous magnesium alloy after corrosion is placed in distilled water and cleans, and applies ultrasonic wave and vibrate, obtain porous magnesium alloy.The porous magnesium alloy mean pore size obtained is 153 μm, and porosity is 50%.There is no the residual of objectionable impurities.
The present invention adopts the method in ASTME8 standard to test the compressive strength of the porous magnesium alloy that the present embodiment obtains, and result shows, the porous magnesium alloy compressive strength that the present embodiment obtains is 11MPa.
The present invention tests the Young's modulus of the porous magnesium alloy obtained according to the method in ASTME8 standard, result shows, the Young's modulus 0.75GPa of the porous magnesium alloy that the present embodiment obtains.
Embodiment 4
Modeling is carried out according to the structure of the figure below in Fig. 3, employing diameter is the 500 series stainless steel steel wires (heat-resisting Chrome metal powder stainless steel) of φ 500 μm, first Stainless Steel Wire is woven into the Stainless Steel Cloth of stratiform on braiding machine according to the method shown in Fig. 1 and Fig. 2, again it is piled up layer by layer, obtain stainless steel knitted body.
Under Ar gas atmosphere, be the Mg-Ca magnesium alloy fusing of Mg-Ca by the trade mark, be cast on above-mentioned stainless steel knitted body, obtain magnesium alloy cast body.
Immersed in etchant solution by magnesium alloy cast body, in etchant solution, the volume ratio of mixing acid and distilled water is 5, in mixing acid the volume fraction of HF be 60%, H
2sO
4volume fraction be 5%, HNO
3volume fraction be 35%.Corrosion temperature is 40 DEG C.Wherein bubble is the instruction that etchant solution carries out with Stainless Steel Wire and oxide compound thereof reacting, and when bubble is not when producing, Stainless Steel Wire and oxide compound thereof are completely removed.
Porous magnesium alloy after corrosion is placed in distilled water and cleans, and applies ultrasonic wave and vibrate, obtain porous magnesium alloy.The porous magnesium alloy mean pore size obtained is 153 μm, and porosity is 50%.There is no the residual of objectionable impurities.
The present invention adopts the method in ASTME8 standard to test the compressive strength of the porous magnesium alloy that the present embodiment obtains, and result shows, the compressive strength of the porous magnesium alloy that the present embodiment obtains is 10.2MPa.
The present invention tests the Young's modulus of the porous magnesium alloy obtained according to the method in ASTME8 standard, result shows, the Young's modulus 0.63GPa of the porous magnesium alloy that the present embodiment obtains.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a preparation method for porous magnesium alloy, comprises the following steps:
A) Stainless Steel Wire is woven, obtain Stainless Steel Wire knitted body;
B) by the magnesium alloy pouring of fusing in described steps A) on the stainless steel knitted body that obtains, obtain magnesium alloy cast body;
C) by described step B) in magnesium alloy cast body immerse in etchant solution, obtain porous magnesium alloy, described etchant solution comprises mixing acid and water, and described mixing acid comprises HF, H
2sO
4and HNO
3.
2. preparation method according to claim 1, it is characterized in that, the material of described Stainless Steel Wire comprises one or more in chromium-nickel-manganese austenitic stainless steel, chromium-austenitic stainless steel, ferrito-martensite stainless steel, heat-resisting Chrome metal powder stainless steel and martensitic precipitation.
3. preparation method according to claim 1, is characterized in that, the diameter of described Stainless Steel Wire is 50 ~ 550 μm.
4. preparation method according to claim 1, is characterized in that, described magnesium alloy comprises one or more in magnalium series alloy, magnesium zinc zirconium series alloy, magnesium zinc series alloy and magnesium calcium series alloy.
5. preparation method according to claim 4, is characterized in that, described magnalium series alloy comprises one or more in Mg-Al-Zn alloy, Mg-Al-Mn alloy, Mg-Al-RE alloy and Mg-Al-RE-Li alloy;
Described magnesium zinc series alloy comprises one or more in Mg-Zn-Zr alloy, Mg-Zn alloy, Mg-Zn-Mn alloy, Mg-Zn-Mn-Ca alloy and Mg-Zn-Zr-Y alloy.
6. preparation method according to claim 1, is characterized in that, in described mixing acid, the volume fraction of described HF is 50 ~ 60%; H
2sO
4volume fraction be 5 ~ 15%; HNO
3volume fraction be 35 ~ 45%.
7. preparation method according to claim 1, is characterized in that, the volume ratio of described mixing acid and water is (2 ~ 5): 1.
8. preparation method according to claim 1, is characterized in that, described mixing acid and described step B) volume ratio of magnesium alloy cast body that obtains is (1.5 ~ 100): 1.
9. preparation method according to claim 1, is characterized in that, described step C) in the temperature of etchant solution be 20 ~ 40 DEG C.
10. preparation method according to claim 1, is characterized in that, described step B) in be cast in shielding gas atmosphere under carry out.
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| CN113459631A (en) * | 2020-03-31 | 2021-10-01 | 昆山科森科技股份有限公司 | Preparation process of reinforced porous magnesium metal |
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