CN101899554A - Improve the method and the application thereof of metal surface diffusivity - Google Patents
Improve the method and the application thereof of metal surface diffusivity Download PDFInfo
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- CN101899554A CN101899554A CN2010101483699A CN201010148369A CN101899554A CN 101899554 A CN101899554 A CN 101899554A CN 2010101483699 A CN2010101483699 A CN 2010101483699A CN 201010148369 A CN201010148369 A CN 201010148369A CN 101899554 A CN101899554 A CN 101899554A
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Abstract
A kind of method and application aspect the surface treatment of metal implant thereof that improves metal surface diffusivity, described method is in conjunction with mechanical means and chemical process, and wherein said mechanical means increases the surface diffusion rate and described chemical process forms the character that the upper layer of chemical modification is used for improving the metallic substance that is suitable for application-specific (especially at biomedicine field).This surface treatment can increase stainless hardness and erosion resistance and reduce the release of the Ni in implant of being made by NiTi silk material.
Description
Technical field
The present invention relates to improve the method and the application thereof of metal surface diffusivity.Particularly, the present invention relates to the surface treatment method in conjunction with mechanical means and chemical process, wherein mechanical means increases the diffusivity on surface and chemical process forms the character that the upper layer of chemical modification is used for improving the metallic substance that is suitable for application-specific (especially at biomedicine field).
Background technology
Stainless steel is widely used in daily life and industry.For example, stainless steel is widely used in the biological medicine industry to make orthopaedic implants, dental implants and some other implant, and for example hone lamella, artificial femoral articulation, intramedullary pin or the like are referring to United States Patent (USP) the 4th, 964, No. 925, the 4th, 718, No. 908 and the 4th, 775, No. 426.Yet well-known, stainless steel has its shortcoming.Because stainless surface hardness is low, implant wearing no resistance in vivo.Fixing and the wear debris that the wear resistance of difference can be destroyed implant is harmful to host tissue.In addition, stainless steel has low anti-pitting, is especially containing Cl
-Warm saliferous body fluid in.In order to overcome more stainless weakness, United States Patent (USP) the 5th, 205 No. 921 and the 5th, 482, has been described two technologies to apply the bioactivity calcium phosphate coating that is used for metal implant equipment biological activity combination on metal implant equipment No. 731.United States Patent (USP) the 5th, 057 discloses a kind of process of surface treatment that is used for stainless steel orthopaedic implants equipment No. 108, wherein, after two sandblasting steps, electropolishing and passivations, formed heavily cold-working skin, described skin has improved the fatigue property of described equipment.
In another biomedicine field, fast development along with interventional therapy method, because the fabulous mechanical property of NiTi shape memory alloy wire material, strong shape memory effect, super-elasticity character, appropriateness favorable chemical resistance and biocompatibility, the NiTi shape memory alloy wire material is widely used in producing cardiovascular implant, the tracheae implant, oesophagus implant and some other implant, referring to United States Patent (USP) the 6th, 375, No. 458, the 6th, 224, No. 625, the 5th, 882, No. 444, No. the 02124291.7th, Chinese patent, No. 02240165.2, or the like.The widespread use of these implants means two concerned issues of biocompatibility aspect.The first, after the implantation, have disadvantageous tissue reaction, this shows the undesirable and further improvement of needs of biocompatibility of NiTi silk material.The second, deleterious Ni+ has found that to external diffusion the lasting NiTi of use implant is carcinogenic in human body in the NiTi implant, causes the potential health problem.United States Patent (USP) the 7th, 000 has been described for No. 305 after the heat setting type with expansible fluoropolymer-coated NiTi silk material or some other material to reduce platelet adhesion reaction in the technology of support.In the disclosed content in this area, do not find on NiTi silk material, to have other inorganic coatings (for example, titanium dioxide or carbon coating) of good blood compatibility.By the adding Perfected process that to be different from the independent coating material layer of primer (for example, stainless steel or NiTi) be not the modified metal surface, therefore need change a direction and consider different schemes.
Summary of the invention
Therefore, an object of the present invention is to provide a kind of novel surface method of modifying, the independent coating that this method does not rely on the metallic surface improves stainless hardness and corrosion resistance nature and the release of minimizing Ni from the NiTi metal wire material.Another object of the present invention provides a kind of auto-plant that is used for the metallic surface is carried out machinery reprocessing.
Above-mentioned purpose of the present invention and other purposes are realized by following method: by providing physics that the method that mechanical means and chemical process are combined improves the metallic surface and chemical property so that it is suitable for specific purpose, for example be used for the application as implant.In fact, the present invention uses mechanical technology to improve the diffusivity of pending metallic surface, implements chemical technology then with from physically and chemically changing described surface.Described mechanical technology helps described chemical technology subsequently, with realize independent described mechanical technology and independent described chemical technology the effect that can't realize.Think that described mechanical technology forms specific nanocrystal surface structure, it is characterized in that superfine crystal particle, the size of common described superfine crystal particle at least one dimension is less than 100nm.Not bound by theory, the nanocrystal surface structure can be as the basis of observed surface diffusion rate raising.Invented several mechanical means and mechanical means, be used on tinsel, forming the microstructured layers or the nanostructured layers of nanometer scale, as disclosed in the United States Patent (USP) (7,147,726 and 7,300,622) before the present inventor.Surface modification produced according to the present invention has the following advantages: (1) nanostructured layers is formed directly on the surface of tinsel and described layer has and the substrate identical materials, and therefore, the density of nanostructured layers is big and purity is high; (2) particle size has level and smooth transition from nano structure superficial layer to the bottom substrate, does not have separation surface clearly, the adhesion problem that can avoid coated material often to meet with; And (3) described technology implements in air or under the rough vacuum condition by mechanical means, therefore, avoided using complicated electric installation for example to be used for the equipment and the high-vacuum pump of sputter or evaporation.Require to be of value in industrial application, to handle heavy parts for the low of operating environment.
As specific example, because treated stainless hardness increases, 304 stainless steels than low nickel content can replace common 316 stainless steels that use in implant now.
And, designed the novel surface treatment facility, make it to hold and have complicated shape and large-sized metal medical implant.
In the claims that form a part of this disclosure, very at length pointed out to describe each feature of the novelty of characteristic of the present invention.In order to understand the present invention, its service advantages better, and use the specific purpose that is realized by it, should be referring to accompanying drawing and following description, example and described preferred implementation of the present invention wherein.
Description of drawings
Figure 1A represents to be used for forming by bombardment the equipment synoptic diagram of nanostructure on the stainless steel intramedullary pin;
Figure 1B represents the vertical view of equipment under the situation of not belt chamber's lid and spheroid among Figure 1A;
Fig. 2 A represents to be used for forming by bombardment the equipment synoptic diagram of nanostructure on long stainless steel hone lamella;
Fig. 2 B represents to be used for forming by bombardment the equipment synoptic diagram of nanostructure on the stainless steel hone lamella of two weak points;
The vertical view of the equipment lid among Fig. 3 A presentation graphs 3B;
Fig. 3 B represents to be used to form the equipment synoptic diagram of nanostructure, and one of them spatial is risen and can be regulated;
The synoptic diagram of the equipment among Fig. 3 C presentation graphs 3B, wherein, two joint prosthesises are installed by stationary installation, and adopt bombardment to handle respectively in by two spaces of fence off;
Fig. 4 is illustrated in equipment and the stationary installation that forms nanostructure on the NiTi silk material by bombardment;
Fig. 5 A is illustrated in the microhardness of 450 ℃ of down plasma nitrided former state stainless steel hone lamellas and the pre-treatment by forming nanostructure and 450 ℃ of microhardnesses of the stainless steel hone lamella of plasma nitrided different times down according to the present invention;
The thickness of the nitride layer of the stainless steel hone lamella among Fig. 5 B presentation graphs 5A;
Fig. 5 C is illustrated in electrokinetic potential (potentiodynamic) scintigram of 450 ℃ of down plasma nitrided former state stainless steel hone lamellas and the pre-treatment by forming nanostructure and at 450 ℃ of electrokinetic potential scintigrams of the stainless steel hone lamella of plasma nitrided different times down according to the present invention;
Fig. 6 A represent the titanium oxide thickness of 200mm former state NiTi silk material and according to the present invention by forming that nanostructure was carried out pre-treatment in 3 minutes and at 10%H
2O
2In the solution, the titanium oxide thickness of 24 hours NiTi silk material of 80 ℃ of oxidations;
Fig. 6 B is illustrated in the release that under the envrionment temperature (20 ℃ to 25 ℃) the NiTi silk material among Fig. 6 A of 20cm length is soaked in the Ni in the 50ml 0.9%NaCl solution.
Embodiment
Figure 1A has represented to go up vertical view when generating the equipment synoptic diagram of nanostructure and this equipment at not belt chamber (21) lid (20) and spheroid (22) by bombardment at stainless steel intramedullary pin (10).By nut (201) lid (20) is anchored on described chamber.According to Fig. 1, to go up the principle that generates nanostructure by bombardment be by using two ultrasonic generators (23) with given frequency operation to make spheroid (22) motion to the stainless steel implant (10) of long rotation, and described ultrasonic generator (23) places two spatial bottoms that are used to project the spheroid (22) with full spherical.The motion amplitude of the selectable sound utmost point (sonotrode) (23) is to the hundreds of micron from several microns.Spheroid (22) from the motion of the described sound utmost point obtain energy and the surface of the described implant that rotating with indefinite and a plurality of incident angles bumps many times, make each bump be created in the elastic deformation of the alloy grain on the either direction.Contact described implant and the spheroid of degradedness rebounds the described sound utmost point obtaining new speed, from described implant look described speed direction as if at random, but the direction of described speed is determined by physical law.If described spheroid degradedness, described spheroid slides and is collected and re-used along described spatial ramped bottom surface (24).Each end of described implant is installed by anchor clamps (25), and described anchor clamps are fixing by inset (26), and described inset is fixed in the pipe (27) by nut (28).Described pipe is supported by two strut members (29).The rotation of motor (30) can be passed to the gear (31) that is positioned at described pipe middle part by gear unit (32).Described implant rotates with given speed during handling, and can handle whole surface like this.Distance between the sound utmost point (23) and the processed implant (10) can be controlled by the vertical position of adjusting the described sound utmost point.In Fig. 1, only illustrate two spaces that are used to handle elongated implant.In the situation of handling longer and wideer implant, spatial quantity and row's number can further increase.
According to the embodiment variant shown in Fig. 2 A, pending implant can be long bone plate (11).Each end of described implant is installed by anchor clamps (41), and described anchor clamps are fixing by inset (42), and described inset (42) is fixed in the pipe (27), swivel pipe during handling (27).In Fig. 2 B, two short bone plates (12) are connected to the long bone plate and handle.Other are handled situation and are similar to situation shown in Figure 1.
According to another embodiment variant shown in Fig. 3, pending implant can be artificial femoral articulation (13).Because its complicated shape, head and shank are handled respectively in two spaces.In this case, described two spaces are separated by fence (51).The unprocessed portion of described implant is gripped or is only pressed from both sides to fixture block by die (52) in treating processes.The vertical position of described die or described fixture block can be controlled by nut (53).For altitude mixture control significantly, go up by nut (55) mounting cup (54) at the lid (20) of work chamber.If the vertical dimension of implant described in the treating processes is too big, inserts the plate (56) in the hole of lid and can be replaced by mould (52) or the fixture block that is connected to described implant.In Fig. 3 C, the artificial femoral articulation in left side can rotate with given speed in treating processes.Other are handled situation and are similar to the situation shown in Fig. 1.
Fig. 4 has represented to generate by bombardment the equipment and the stationary installation of nanostructure on the volume of NiTi silk material.Left side stationary installation (14) can discharge and collect NiTi silk material (15), the direction of motion of the described silk of right side stationary installation (16) counter-rotating material.Initial silk material discharges from the upper winding shaft (61) of left side stationary installation, and lower winding shaft (62) is driven with the silk material after the collection and treatment by motor (63).The power of motor (63) is provided by two metal rings (64) on the left side stationary installation (14), and described metal ring contacts with two elastic electrodes (65) on being fixed on seat stand (33).Slide plate (66) is pressed on the wheel rim of upper winding shaft (61) so that described silk material is applied adjustable tension stress by spring.Described two stationary installations and weighting material (67) are fixed in pipe (27), and described pipe rotates with given speed in treating processes.In Fig. 4, the fragment of described silk material is passed through work chamber twice by roller set (68), so the treatment time doubles.Can increase the treatment time, for example three times or more times by further folding described silk material.By the segmental overall treatment time that number of times * (the linear translational speed of single spatial width * described spatial quantity/described silk material) calculate described silk material of described silk material by described chamber.Other are handled situation and are similar to the situation shown in Fig. 1.
Described equipment is not limited to above-mentioned embodiment, but comprises all possible embodiment that generates nanostructured layers by mechanical means on metal implant.
Choosing parameter is with the ultimate principle that generates nanostructure according to the present invention on implant: the kinetic energy of described spheroid is big more, and the stress level that produces in the bottom is high more.The kinetic energy upper limit specifically determines that by the physical strength of heating and described spheroid and the physical strength of the material that constitutes described implant described heating is caused by the release of this kinetic energy in processed surperficial knockout process.The hardness of described spheroid works, especially from described spheroid to the kinetic energy on the surface of described implant transmits.Experience shows, the diameter of employed spheroid big more (at about hundreds of micron to several millimeters range scale), and the nanostructured layers that is obtained is big more.
Equally, the treatment time is relevant with the thickness of definite nanostructure.Have been noted that the used time is long more in given time value (this value can be different and depend on the size of described spheroid), the thickness of nanostructured layers is thick more, until corresponding to the moment saturated and that nanometer layer thickness can not change again.This set-point or obtained by experience, perhaps the mathematical model from given material obtains.Yet after the time exceeded described preset time, the thickness of described nanostructured layers reduced.This phenomenon is owing to the following fact: the release that described spheroid produces heat to the surface treated bump, the release of described heat is heated material.From certain threshold value, the result of described heat is that the size of metal grain increases.
The rotating speed of processed implant (for example from 0.5rpm to 5rpm) is another parameter.The local temperature that rotation help to reduce processed implant promotes, because back to the bombardment of a side of the sound utmost point still less, and discharges heat energy for implant at interval if having time.Rotating speed is high more, and the unit time inner accumulated is few more at the heat energy of the regional area on processed surface, and described rotating speed should be higher to avoid bombarding the local superheating of generation.For having large-sized implant, rotating speed can be lower, but also should be avoided by the grain growing that the local temperature fast lifting causes.
Other parameters also may form nanostructure in the treating processes and work.Using ultrasonic generator so that in the equipment of spheroid motion, the acoustic pressure that sound wave produces can influence the nanostructure growth process.Thereby avoid overheating effect that described implant grain growing is produced by the temperature rise that cooling system can reduce implant.Described equipment also can place inert gas environment or vacuum to avoid the surface oxidation of processed metal implant.
The generation nanostructure causes the correction in the diffusion law in processed zone on the processed surface of implant.From in essence, being multiplied of metal grain also increased intercrystalline number of boundary.These borders have constituted the nanochannel that allows compound spread.Therefore, these compounds can infiltrate the processed surface of implant darker and more completely, and this compound layer that makes acquisition have very good mechanical properties and chemical property becomes possibility.
For example, Fig. 5 A and Fig. 5 B have represented under 450 ℃ by the microhardness and the nitride layer thickness of plasma nitrided former state stainless steel hone lamella and the hone lamella by generating the nanostructure pre-treatment.Stainless steel hone lamella pre-treatment 0.5 minute, 1 minute, 2 minutes, 4 minutes, 8 minutes, 15 minutes and 30 minutes.Described former state hone lamella (not pre-treatment hone lamella) and described pre-treatment hone lamella carried out respectively plasma nitrided 30 minutes, 60 minutes and 120 minutes.Former state hone lamella and under test 100gf indentation force on the vickers microhardness tester by the hardness of nitrogenize hone lamella.Measure the nitrogenize thickness of cross section at microscopically.The hardness of plasma nitrided hone lamella is higher than the hardness of former state hone lamella as can be seen from Figure 5A, and the hardness of described former state hone lamella only is 253Hv.Hardness value raises with pretreatment time before 4 minutes, and described hardness value handle at 1 minute surface mechanical attrition (also claim making Nano surface, be called for short SMAT) afterwards near or surpass 1000Hv.At identical pretreatment time, hardness value raises with the increase of nitridation time.Pre-treatment has increased the thickness of nitride layer significantly.For example, the nitride layer thickness of unpretreated hone lamella is 8.5mm only, and 30 minutes hone lamella of pre-treatment nitride layer thickness after plasma nitrided 120 minutes increases to 16.3mm.Since nitride layer has the hardness higher than the stainless steel-based end, have reason to believe and compare not by the pre-treatment hone lamella pre-treatment hone lamella has higher hardness after plasma nitrided.Therefore the nanostructured layers with high rigidity that generates is useful to the wear resistance and the fatigue lifetime that promote implant.
In fact, the existence of nanostructure particularly is the existence of nanometer diffusion admittance, allows compound diffuse into the upper layer of metal device more quickly.The above results has confirmed that grown nitride layer will also promptly have been quickened the nitridation kinetics process faster than growing nitride on unpretreated hone lamella on by the stainless steel hone lamella that generates the nanostructure pre-treatment.In addition, observation by light microscope shows that the nitride layer of pretreated hone lamella will more all even densification than the nitride layer of unpretreated hone lamella.
Fig. 5 C represent 450 ℃ through the electrokinetic potential scintigram of the former state stainless steel hone lamella of 120 minutes pecvd nitrides and according to the present invention by forming nanostructure pre-treatment and 450 ℃ of electrokinetic potential scanning curves through the plate of 120 minutes pecvd nitrides.Under the envrionment conditions, in 50ml0.9%NaCl solution, use 0.5cm
2Test area is carried out corrosion test.Initial spl have 0.31V voltage breakdown and the test after have the corrosion recessed, described corrosion is recessed to show that anti-pitting is low.By relatively current potential-current curve and microscopic examination, as can be seen, the plate by pre-treatment in 0.5 minute to 4 minutes and 120 minutes plasma nitridation process shows good anti-pitting; But show full corrosion by pre-treatment in 8 minutes to 30 minutes and 120 minutes plasma nitrided samples.Therefore, has high surface hardness and good anti-recessed corrodibility by pre-treatment in 0.5 minute to 4 minutes and plasma nitrided stainless steel implant.
Fig. 6 A represent 200mm former state NiTi silk material oxidated layer thickness and by generated through 3 minutes the pretreated of nanostructure and 80 ℃ through 24 hours at 10%H
2O
2The oxidated layer thickness of the silk material of oxidation in the solution.This shows that the titanium oxide layer of nature is thin really on the NiTi silk material, only about 50nm.This thickness is determined by DSIMS (dynamic secondary ion massspectrum) curve.It is because Ti has higher O affinity than Ni that titanium oxide layer forms.At H
2O
2In the solution, the O atom is enriched in NiTi silk material surface, and the Ti atom in the alloy substrates can spread outward to the surface according to the extensive chemical motivating force to form titanium oxide compound, stay the subgrade (sub-layer) that is rich in Ni.Because titanium oxide layer is different in itself with substrate, thick titanium oxide layer can cause the crackle of system and in conjunction with problem.Can regulate titanium oxide thickness by changing oxygenation parameters.Titanium oxide thickness as shown in Figure 6A is optimum thickness, and this thickness does not cause layer cracking or layer to be peeled off in our experience.Described titanium oxide layer can be used as fender and works to stop silk material Ni in implant atom to spread outward to ambient body fluid.By this effect of Fig. 6 B example, it is represented under envrionment temperature (20 ℃ to 25 ℃), and the long NiTi silk material Ni in the 50ml0.9%NaCl solution after soaking 6 months of the 20cm of Fig. 6 A discharges.By Ni content in the atomic absorption light spectrometry solution.Ni discharges attenuating, is reduced to the only 5ppb that handles a material from the 26ppb of former state silk material.Harmful Ni ionic discharges and reduces the biocompatibility that helps to improve the support implant of being made by NiTi silk material.Simultaneously, the increase of the erosion resistance of NiTi silk material helps the stability of human body inner support implant, and human body is many-sided bonded complex environment.
Apparatus embodiments
The equipment that generates given thickness nanostructure on metal implant comprises can be divided into a plurality of spatial work chamber, be used for making in each space the preset time that the spheroid with full spherical of the intended size of specified rate continues with the given speed motion device, be used in each space using the device of described spheroid repeatedly continuously and be used to install implant and with given speed rotation implant to obtain the device of incidence angle variable degree at identical impact point, described like this impact point covers the surface of whole implant in a cluster.The method that is used for the metal implant surface modification is included in sealed chamber and forms the protectiveness compound layer or form the protection compound layer by the high diffusibility matter of using nanostructured layers in the chemical solution of specified criteria.
In another embodiment, work chamber has two spaces, separates described space and at least one space has adjustable rising with fence.
In another embodiment, be used to make the device of described spheroid motion to comprise the ultrasonic generator of each bottom, space, this ultrasonic generator causes described spheroid to move with direction at random, and being used for using the device of described spheroid repeatedly is each spatial ramped bottom surface.
In another embodiment, pending implant is the stainless steel intramedullary pin, and the diameter of this intramedullary pin is 10mm, and length is 240mm.
In another embodiment, pending implant is the stainless steel hone lamella, and the width of described hone lamella is 40mm, and length is 220mm.
In another embodiment, pending implant is the stainless steel hone lamella, and the width of described hone lamella is 50mm, and length is 120mm.
In another embodiment, pending implant is the stainless steel artificial femoral articulation, and described hip joint stalk minister is 90mm, and head diameter is 28mm.
In another embodiment, pending implant is a NiTi silk material, and the diameter of described silk material is 0.1mm to 0.5mm.
In another embodiment, by anchor clamps or the fixing described implant of some other stationary installation, described anchor clamps or some other stationary installation are installed in the pipe, and by gear drive, the speed of rotation of described pipe is 0.5rpm to 5rpm to described pipe by motor.
In another embodiment, the linear translational speed of NiTi silk material is 10cm/min to 40cm/min.
In another embodiment, the spheroid with full spherical is made by stainless steel.
In another embodiment, the spheroid with full spherical is made by zirconium white.
In another embodiment, according to the thickness of the needed nanostructure of user, the diameter of described spheroid is 0.3mm to 3mm.
In another embodiment, the quantity of described spheroid is: when utilizing the ultrasonic device that makes the motion of described spheroid to quit work, the shared surface-area of these spheroids greater than sound extremely the surface 30%.
In another embodiment, described spheroid speed is 5mps to 100mps.
In another embodiment, for the implant with intended size of given sphere size and given material composition, determine projection time according to the needed nanostructure layer thickness of user.
In another embodiment, the projection time of described spheroid is 30 seconds to 1800 seconds.
In another embodiment, the equipment that is used to generate nanostructure comprises the device of the speed of the projection time that is used to regulate spheroid and spheroid.
In another embodiment, described equipment comprises the device of the distance between the injection source that is used to regulate spheroid and the pending implant.
In another embodiment, described distance is 20mm to 80mm.
In another embodiment, the equipment that is used to form nanostructure comprises and is used for local refrigerative device is carried out in the processed zone of described implant.
In another embodiment, described projection step is carried out after described chamber is filled rare gas element.
In another embodiment, described equipment is closed in the vacuum chamber.
In another embodiment, described equipment is closed in the soundproof room.
In another embodiment, the step that forms the protectiveness nitride layer on the stainless steel implant is plasma nitrided, comprising implant is placed in the nitrogen atmosphere, to fixed temperature be about 450 ℃, the time length is 30 minutes to 120 minutes.
In another embodiment, the step that on NiTi silk material, forms protective oxide layer comprise with NiTi silk material be placed on that concentration is 10% to 30%, temperature is 60 ℃ to 100 ℃ H
2O
2In the solution, be 12 hours to 24 hours preset time.
Although above record and emphasized that basic new feature of the present invention is applied to preferential embodiment, be appreciated that, under the situation that does not depart from essence of the present invention, those skilled in the art can be to wherein the form and the details of illustrational embodiment are carried out various omissions, replacement and variation.Above-mentioned embodiment only as example, does not constitute qualification to the present invention, can make amendment with various different modes in the protection domain that appended Patent right requirement limits.
Claims (19)
1. a method that improves metal surface diffusivity said method comprising the steps of: handle generating the plane of crystal structure by surface mechanical attrition.
2. equipment that is used on metal implant forming the nanostructure of given thickness, described equipment comprises: can be divided into a plurality of spatial work chamber, be used for making the spheroid with full spherical of the intended size of specified rate to continue the device of given time with the given speed motion in each space, be used for using repeatedly continuously the device of described spheroid in each space, and be used to install described implant and rotate described implant to obtain the device of variable input angle at same impact point with given speed, described like this impact point covers the whole surface of described implant in a cluster.
3. the equipment that is used for forming the nanostructure of given thickness on metal implant according to claim 2, described equipment comprises that also fence is to separate the described space of described work chamber.
4. the equipment that is used for forming the nanostructure of given thickness on metal implant according to claim 3, wherein, at least one space has adjustable rising.
5. the equipment that is used on metal implant, forming the nanostructure of given thickness according to claim 4, described equipment also comprises the ultra-sonic generator that is positioned at each bottom, described room, so that described spheroid motion causes described spheroid to move with random direction.
6. the equipment that is used for forming the nanostructure of given thickness on metal implant according to claim 4, described equipment comprises that also each spatial ramped bottom surface is to use described spheroid repeatedly.
7. the equipment that is used on metal implant, forming the nanostructure of given thickness according to claim 6, wherein, described implant is intramedullary pin, hone lamella, the artificial hip joint of being made by stainless steel and NiTi metal wire material, or the like.
8. the equipment that is used on metal implant, forming the nanostructure of given thickness according to claim 6, described equipment comprises that also anchor clamps or some other stationary installation are with fixing described implant, described anchor clamps or some other stationary installation are installed in the pipe, by gear drive, the speed of rotation of described pipe is 0.5rpm to 5rpm to described pipe by motor.
9. the equipment that is used on metal implant forming the nanostructure of given thickness according to claim 6, described equipment also comprise stationary installation so that the NiTi metal wire material with the linear velocity motion of 10cm/min to 40cm/min.
10. the equipment that is used on metal implant, forming the nanostructure of given thickness according to claim 6, wherein, described spheroid with full spherical is made by stainless steel or zirconium white, and according to the thickness of the required described nanostructure of user, the diameter of described spheroid is 0.3mm to 3mm.
11. the equipment that is used on metal implant, forming the nanostructure of given thickness according to claim 6, wherein, the quantity of described spheroid is: when utilizing the ultrasonic device that makes the motion of described spheroid not work, the surface-area that described spheroid occupies is greater than 30% of the surface of the ultrasonic sound utmost point.
12. the equipment that is used for forming the nanostructure of given thickness on metal implant according to claim 6, wherein, the speed of described spheroid is 5mps to 100mps.
13. the equipment that is used on metal implant, forming the nanostructure of given thickness according to claim 6, wherein, for given sphere size with constitute for the given material of the implant with intended size, the projection time of determining according to the thickness of the required nanostructured layers of user is 30 seconds to 1800 seconds.
14. the equipment that is used on metal implant forming the nanostructure of given thickness according to claim 13, described equipment also comprise the device of the projection time that is used to regulate described spheroid.
15. the equipment that is used on metal implant forming the nanostructure of given thickness according to claim 6, wherein, the distance between the emissive source of described spheroid and the pending described implant is 20mm to 80mm.
16. the equipment that is used for forming the nanostructure of given thickness on metal implant according to claim 15, described equipment also comprises the device that is used to regulate described distance.
17. the equipment that is used for forming the nanostructure of given thickness on metal implant according to claim 6, described equipment also comprises and is used for described implant treatment zone is carried out local refrigerative device.
18. the equipment that is used for forming the nanostructure of given thickness on metal implant according to claim 6 wherein, is carried out the projection step after the use rare gas element is filled described chamber.
19. the equipment that is used for forming the nanostructure of given thickness on metal implant according to claim 5 wherein, is closed in described equipment in the vacuum cabinet.
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| US16893909P | 2009-04-14 | 2009-04-14 | |
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| CN103160664A (en) * | 2013-03-20 | 2013-06-19 | 上海理工大学 | Method for performing surface strengthening treatment on stainless steel welding joint |
| CN105624590A (en) * | 2014-11-28 | 2016-06-01 | 财团法人金属工业研究发展中心 | Metal wire grain refining processing device |
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|---|---|---|---|---|
| CN1336444A (en) * | 2000-07-28 | 2002-02-20 | 中国科学院金属研究所 | Nanometer structure forming method and special equipment therefor |
| CN1336445A (en) * | 2000-07-28 | 2002-02-20 | 中国科学院金属研究所 | Treatment method and special treating equipment for forming nanometer structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103160664A (en) * | 2013-03-20 | 2013-06-19 | 上海理工大学 | Method for performing surface strengthening treatment on stainless steel welding joint |
| CN105624590A (en) * | 2014-11-28 | 2016-06-01 | 财团法人金属工业研究发展中心 | Metal wire grain refining processing device |
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