CN212480811U - Porous material radial grading structure - Google Patents
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Abstract
The utility model belongs to the porous material field, concretely relates to porous material radial hierarchical structure, porous material radial hierarchical structure has the advantage of high porosity, high strength, light weight. The porous material radial hierarchical structure comprises 4 radial hierarchical structure supporting pieces, namely an innermost layer supporting piece, a secondary inner layer supporting piece I, a secondary inner layer supporting piece II and an outer layer supporting piece, and the porosity and the equivalent pore diameter are designed and regulated through a gradient gradually-changed pore structure so as to achieve the optimal mechanical strength and biocompatibility. Has the potential significance of realizing weight reduction of the titanium metal part and improving the mechanical strength of the porous material.
Description
Technical Field
The utility model belongs to the porous material field, concretely relates to porous material radial hierarchical structure of high porosity, high strength, light weight.
Background
Titanium and its alloy have the outstanding advantages of low density, high strength, good biocompatibility and corrosion resistance, etc., and are widely applied in the fields of aerospace, chemical engineering, biomedical, etc. In order to achieve the application purposes of light weight and low elastic modulus of the material, a porous structure is introduced into the titanium alloy to be an effective method. The porous titanium combines the characteristics of titanium alloy and foam metal, can reduce the weight of the material without weakening the strength of the material, and has excellent toughness and rigidity. Therefore, the excellent performance of the porous titanium and the alloy thereof can lead the porous titanium to have wide application prospect in some special fields, such as impact-resistant materials, high-temperature filter layers, noise elimination devices, submarine interlayers, biomedical materials and the like.
The traditional manufacturing methods of the porous titanium alloy comprise a powder direct sintering method, a space occupying method, a powder deposition method and the like, and the manufacturing methods have the problems that the porosity, the aperture size and the pore structure cannot be accurately controlled, the internal porosity is poor in connectivity and the like. With the widening of application fields and the improvement of application environment requirements, the demand of porous titanium alloys with highly complex shapes and precise scales is gradually increased. The selective laser melting 3D printing technology integrates the advanced laser technology, the computer aided design and manufacturing technology and the powder metallurgy technology, and compared with the traditional processing method, the selective laser melting 3D printing method omits the manufacturing process of a die and has great advantages in the field of producing metal parts with complex shapes and individuation.
At present, most of 3D printing porous titanium alloy materials on the market are simple pore canal communication systems formed by arraying structural units with fixed pore sizes, such as regular octahedrons, triangular pyramids, hexahedrons and the like. The structural unit generally has the defects of single micropore structure, repeated structure, poor anisotropy of pore channels and the like. The precision of the selective laser melting technology can reach 100 micrometers, the precise control of the internal structure of the porous titanium can be met, and the advantage of precisely controlling the internal structure of the 3D printing is not fully exerted due to the fact that the structural design is not sound.
SUMMERY OF THE UTILITY MODEL
To the single repeated problem of current porous titanium microporous structure, the utility model provides a porous material radial hierarchical structure of high porosity, high strength, light weight. The porous material radial hierarchical structure comprises 4 radial hierarchical structure supporting pieces, and porosity and equivalent pore diameter are regulated and controlled through gradient gradual change pore structure design so as to achieve optimal mechanical strength and biocompatibility. Has the potential significance of realizing weight reduction of the titanium metal part and improving the mechanical strength of the porous material.
The utility model discloses a realize through following technical scheme:
a porous material radial hierarchical structure comprises a plurality of tightly connected supporting pieces with different structures, and a gradient gradually-changed pore structure is formed;
the supporting pieces comprise an innermost layer supporting piece, a secondary inner layer supporting piece I, a secondary inner layer supporting piece II and an outer layer supporting piece;
the innermost layer support is used as the innermost layer of the porous material radial hierarchical structure, and forms the minimum density and the maximum equivalent pore size of the porous material radial hierarchical structure; the first secondary inner layer supporting piece and the second secondary inner layer supporting piece are sequentially used as secondary inner layers of the porous material radial hierarchical structure to form a middle-level pore diameter of the porous material radial hierarchical structure and used as multi-scale smooth transition of material density of the porous material radial hierarchical structure; the outer layer supporting piece is used as an outermost layer and forms the minimum pore size and the maximum density of the radial hierarchical structure of the porous material; therefore, the porous material radial grading structure forms a structure with graded and gradual change of the porosity and the equivalent pore size of the porous titanium.
Furthermore, the innermost layer supporting piece, the secondary inner layer supporting piece I, the secondary inner layer supporting piece II and the outer layer supporting piece are all hexagonal diamond molecular structures (four cylinders are connected with each other to form a tetrahedral structure) formed by four cylinders with the same length, and are formed by sintering pure titanium or titanium alloy powder.
Furthermore, the length of the cylinder of the innermost layer supporting piece is 0.5-1.5 mm, and the diameter of the cylinder is 0.1-1 mm; preferably, the length is 0.5-1 mm, and the diameter is 0.1-0.5 mm.
Furthermore, the length of the cylinder of the first secondary inner-layer supporting piece is 0.5-1.5 mm, and the diameter of the cylinder of the first secondary inner-layer supporting piece is 0.1-1 mm; preferably, the length is 0.5-1 mm, and the diameter is 0.1-0.5 mm.
Furthermore, the length of the cylinder of the second inner-layer supporting piece is 0.5-1.5 mm, and the diameter of the cylinder of the second inner-layer supporting piece is 0.1-1 mm; preferably, the length is 0.5-1 mm, and the diameter is 0.1-0.5 mm.
Further, the diameters of the cylinders of the innermost layer supporting piece, the secondary inner layer supporting piece I, the secondary inner layer supporting piece II and the outer layer supporting piece are not completely the same.
Further, the heights of the innermost layer supporting piece, the secondary inner layer supporting piece I, the secondary inner layer supporting piece II and the outer layer supporting piece are the same, and the diameter size of the cylinder is adjusted to change the radial gradient, so that the porous material radial grading structure forms a structure with gradually changed porosity and equivalent pore size of the porous titanium.
Further, the innermost support has an array width in the porous material radial hierarchical structure of: 4-10mm, preferably 5-8 mm.
Further, an array width of the first sub-inner layer support in the porous material radial hierarchical structure is: 1-5mm, preferably 2-4 mm.
Further, the array width of the second secondary inner layer support in the porous material radial hierarchical structure is: 4-10mm, preferably 5-8 mm.
Further, the array width of the outer layer supports in the porous material radial hierarchical structure is: 1-5mm, preferably 2-4 mm.
Further, the total array width of the porous material radial hierarchical structure is: 6-30mm, preferably 14-24 mm.
Further, the equivalent pore diameter of the porous material radial hierarchical structure is as follows: 300-700 μm, preferably 350-600 μm; the equivalent aperture is determined by the width of the arrangement array of each support in the porous material radial hierarchical structure: the larger the equivalent diameter of the support member of the inner layer, the larger the average equivalent diameter if the inner layer is widely laid out; outer support piece display becomes wide, and the average diameter will diminish, the utility model discloses a dynamic adjustment is come to the display width of adjusting different specification unit cells the radial hierarchical structure total porosity and the density of porous material.
Further, the porous material radial hierarchical structure is obtained by laser melting 3D printing or electron beam melting 3D printing.
Further, the material of the porous material radial hierarchical structure is pure titanium or titanium alloy.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the utility model provides a radial hierarchical structure of porous material has designed the support piece adjustment pore structure change of 4 kinds of different structures, can obtain the porous material radial hierarchical structure that porosity is high, the aperture size is convenient for adjust, mechanical strength evenly passes through. Under the same porosity condition, the yield strength and the torsional strength of the obtained material are higher than those of the conventional 3D printing porous material. Compare with the titanium alloy part that single structure support piece constitutes, the utility model provides a hierarchical structure can be more accurate match density change the part, or accurate simulation cortex bone and the loose gradual change structure of the closely knit internal force in bone trabecula surface, obtain better bone combination performance from this.
(2) The utility model discloses can adjust support piece frame size according to actual demand to obtain the titanium alloy part in different porosities and different equivalent apertures.
(3) The utility model discloses a porous material radial hierarchical structure can be applied to the porous material in the aspect of biological medical treatment, energy, electron and the chemical industry.
(4) The utility model discloses a selectivity laser melting 3D prints the direct forming, has avoided the use of mould, has reduced material manufacturing cost, can also prepare out the porous functional material that the structure is complicated, the size is accurate simultaneously.
Drawings
Fig. 1A is a schematic structural diagram of a radial hierarchical structure of a porous material in an embodiment of the present invention.
Fig. 1B is a schematic cross-sectional structure diagram of a radial hierarchical structure of a porous material according to an embodiment of the present invention.
Fig. 1C is a schematic structural diagram of an innermost layer supporting member, a secondary inner layer supporting member i, a secondary inner layer supporting member ii, and an outer layer supporting member according to an embodiment of the present invention.
Description of reference numerals: 1 is the innermost layer supporting piece, 2 is the first secondary inner layer supporting piece, 3 is the second secondary inner layer supporting piece, and 4 is the outer layer supporting piece.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings of the embodiments and the specification. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
On the contrary, the invention is intended to cover any alternatives, modifications, equivalents and variations that may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in order to provide a better understanding of the present invention to the public, certain specific details are set forth in the following detailed description of the invention. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the embodiments of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
Example 1
The present embodiment provides a radial graded structure of porous material, as shown in fig. 1A, 1B and 1C, the present embodiment is a high-strength porous TC4 titanium alloy material, and the porous structure is composed of a linear array of innermost layer supporting members, secondary inner layer supporting members one, secondary inner layer supporting members two and outer layer supporting members with gradually changed step gradients; each innermost layer supporting piece, each secondary inner layer supporting piece I, each secondary inner layer supporting piece II and each outer layer supporting piece are formed by connecting 4 cylindrical titanium alloy columns with the same length, and the height of each titanium alloy column (each cylinder) is 1 mm; the diameter of the titanium alloy column of the innermost layer supporting piece is 0.1mm, the diameter of the titanium alloy column of the first secondary inner layer supporting piece is 0.2mm, the diameter of the titanium alloy column of the second secondary inner layer supporting piece is 0.3mm, and the diameter of the titanium alloy column of the outer layer supporting piece is 0.4 mm. The innermost layer of the support members is arrayed at the innermost layer, the minimum density and the maximum equivalent aperture are provided, and the array width is 6 mm; the first secondary inner layer supporting piece and the second secondary inner layer supporting piece are sequentially arrayed on the secondary inner layer, a middle-level aperture is provided, multi-scale smooth transition is provided for material density, and the array width is respectively increased to 9mm and 12 mm; the outer layer supporting pieces are arrayed on the outermost layer and provide the minimum aperture and the maximum density; the total array width of the porous material radial hierarchical structure is 14 mm;
the equivalent pore size of the radial hierarchical structure of the porous material is about 604 μm.
Example 2
The present embodiment provides a radial hierarchical structure of porous material, as shown in fig. 1A, 1B and 1C, the present embodiment is a pure titanium porous material, and the pore structure is composed of an innermost layer support, a secondary inner layer support and an outer layer support in linear arrays, where the process gradient is gradually changed; each innermost layer supporting piece, each secondary inner layer supporting piece I, each secondary inner layer supporting piece II and each outer layer supporting piece are formed by connecting 4 cylindrical pure titanium columns with the same length, and the height of each pure titanium column is 0.6 mm; the diameter of the pure titanium column of the innermost layer supporting piece is 0.1mm, the diameter of the pure titanium column of the first secondary inner layer supporting piece is 0.15mm, the diameter of the pure titanium column of the second secondary inner layer supporting piece is 0.2mm, and the diameter of the pure titanium column of the outer layer supporting piece is 0.3 mm. The innermost layer of the support members is arrayed at the innermost layer, the minimum density and the maximum equivalent aperture are provided, and the array width is 3 mm; the first secondary inner layer supporting piece and the second secondary inner layer supporting piece are sequentially arrayed on the secondary inner layer, a middle-level aperture is provided, multi-scale smooth transition is provided for material density, and the array width is respectively increased to 5mm and 9 mm; the outer layer supporting pieces are arrayed on the outermost layer and provide the minimum aperture and the maximum density; the total array width of the porous material radial hierarchical structure is 13 mm.
The equivalent pore size of the radial hierarchical structure of the porous material is about 480 μm.
Example 3
The present embodiment provides a radial graded structure of a porous material, as shown in fig. 1A, 1B and 1C, the present embodiment is a radial graded structure of a porous material of Ti-5Cu, and the porous structure is composed of an innermost layer support, a secondary inner layer support and an outer layer support in a linear array with gradually changing process gradients; each innermost layer supporting piece, each secondary inner layer supporting piece I, each secondary inner layer supporting piece II and each outer layer supporting piece are formed by connecting 4 cylindrical titanium alloy columns with the same length, and the height of each titanium alloy column is 1 mm; the diameter of the titanium alloy column of the innermost layer supporting piece is 0.2mm, the diameter of the titanium alloy column of the first secondary inner layer supporting piece is 0.3mm, the diameter of the titanium alloy column of the second secondary inner layer supporting piece is 0.4mm, and the diameter of the titanium alloy column of the outer layer supporting piece is 0.6 mm. The innermost layer of the support members is arrayed at the innermost layer, the minimum density and the maximum equivalent aperture are provided, and the array width is 5 mm; the first secondary inner layer supporting piece and the second secondary inner layer supporting piece are sequentially arrayed on the secondary inner layer, a middle-level aperture is provided, multi-scale smooth transition is provided for material density, and the array width is respectively increased to 8mm and 12 mm; the outer layer supporting pieces are arrayed on the outermost layer and provide the minimum aperture and the maximum density; the total array width of the porous material radial hierarchical structure is 14 mm.
The equivalent pore size of the radial hierarchical structure of the porous material is about 520 μm.
Example 4
The present example proposes a radial hierarchical structure of porous material that is substantially the same as that of example 1, except that:
the width of the array of innermost supports is: 2 mm.
The array width of the first secondary inner-layer support piece is as follows: 5 mm.
Namely, the sum of the array widths of the innermost layer supporting piece and the secondary inner layer supporting piece I is as follows: 7 mm.
The array width of the second inner-layer supporting piece is as follows: 10 mm.
The sum of the array widths of the innermost support member, the first secondary inner support member and the second secondary inner support member is: 17 mm.
The array width of the outer layer support is: 5 mm.
The total array width of the porous material radial hierarchical structure is as follows: 22 mm.
The equivalent pore size of the radial hierarchical structure of the porous material is about: 394 μm.
Example 5
The present example proposes a radial hierarchical structure of porous material that is substantially the same as that of example 1, except that:
the width of the array of innermost supports is: 8 mm.
The array width of the first secondary inner-layer support piece is as follows: 1 mm.
Namely, the sum of the array widths of the innermost layer supporting piece and the secondary inner layer supporting piece I is as follows: 9 mm.
The array width of the second inner-layer supporting piece is as follows: 5 mm.
The sum of the array widths of the innermost support member, the first secondary inner support member and the second secondary inner support member is: 14 mm.
The array width of the outer layer support is: 1 mm.
The total array width of the porous material radial hierarchical structure is as follows: 15 mm.
The equivalent pore size of the radial hierarchical structure of the porous material is about: 626 μm.
Example 6
The present example proposes a radial hierarchical structure of porous material that is substantially the same as that of example 1, except that:
the width of the array of innermost supports is: 10 mm.
The array width of the first secondary inner-layer support piece is as follows: 4 mm.
Namely, the sum of the array widths of the innermost layer supporting piece and the secondary inner layer supporting piece I is as follows: 14 mm.
The array width of the second inner-layer supporting piece is as follows: 2 mm.
The sum of the array widths of the innermost support member, the first secondary inner support member and the second secondary inner support member is: 16 mm.
The array width of the outer layer support is: 3 mm.
The total array width of the porous material radial hierarchical structure is as follows: 19 mm.
The equivalent pore size of the radial hierarchical structure of the porous material is about: 628 μm.
Example 7
The present example proposes a radial hierarchical structure of porous material that is substantially the same as that of example 1, except that:
the width of the array of innermost supports is: 4 mm.
The array width of the first secondary inner-layer support piece is as follows: 3 mm.
Namely, the sum of the array widths of the innermost layer supporting piece and the secondary inner layer supporting piece I is as follows: 7 mm.
The array width of the second inner-layer supporting piece is as follows: 8 mm.
The sum of the array widths of the innermost support member, the first secondary inner support member and the second secondary inner support member is: 15 mm.
The array width of the outer layer support is: 1 mm.
The total array width of the porous material radial hierarchical structure is as follows: 16 mm.
The equivalent pore size of the radial hierarchical structure of the porous material is about: 567 μm.
Example 8
The present example proposes a radial hierarchical structure of porous material that is substantially the same as that of example 1, except that:
the width of the array of innermost supports is: 7 mm.
The array width of the first secondary inner-layer support piece is as follows: 4 mm.
Namely, the sum of the array widths of the innermost layer supporting piece and the secondary inner layer supporting piece I is as follows: 11 mm.
The array width of the second inner-layer supporting piece is as follows: 9 mm.
The sum of the array widths of the innermost support member, the first secondary inner support member and the second secondary inner support member is: 20 mm.
The array width of the outer layer support is: 5 mm.
The total array width of the porous material radial hierarchical structure is as follows: 25 mm.
The equivalent pore size of the radial hierarchical structure of the porous material is about: 542 μm.
Example 9
The present example proposes a radial hierarchical structure of porous material that is substantially the same as that of example 1, except that:
the width of the array of innermost supports is: 4 mm.
The array width of the first secondary inner-layer support piece is as follows: 2 mm.
Namely, the sum of the array widths of the innermost layer supporting piece and the secondary inner layer supporting piece I is as follows: 6 mm.
The array width of the second inner-layer supporting piece is as follows: 10 mm.
The sum of the array widths of the innermost support member, the first secondary inner support member and the second secondary inner support member is: 16 mm.
The array width of the outer layer support is: 2 mm.
The total array width of the porous material radial hierarchical structure is as follows: 18 mm.
The equivalent pore size of the radial hierarchical structure of the porous material is about: 437 μm.
Example 10
The present example proposes a radial hierarchical structure of porous material that is substantially the same as that of example 1, except that:
the width of the array of innermost supports is: 10 mm.
The array width of the first secondary inner-layer support piece is as follows: 5 mm.
Namely, the sum of the array widths of the innermost layer supporting piece and the secondary inner layer supporting piece I is as follows: 15 mm.
The array width of the second inner-layer supporting piece is as follows: 10 mm.
The sum of the array widths of the innermost support member, the first secondary inner support member and the second secondary inner support member is: 25 mm.
The array width of the outer layer support is: 5 mm.
The total array width of the porous material radial hierarchical structure is as follows: 30 mm.
The equivalent pore size of the radial hierarchical structure of the porous material is about: 665 μm.
Example 11
The present example proposes a radial hierarchical structure of porous material that is substantially the same as that of example 1, except that:
the width of the array of innermost supports is: 8 mm.
The array width of the first secondary inner-layer support piece is as follows: 4 mm.
Namely, the sum of the array widths of the innermost layer supporting piece and the secondary inner layer supporting piece I is as follows: 12 mm.
The array width of the second inner-layer supporting piece is as follows: 8 mm.
The sum of the array widths of the innermost support member, the first secondary inner support member and the second secondary inner support member is: 20 mm.
The array width of the outer layer support is: 4 mm.
The total array width of the porous material radial hierarchical structure is as follows: 24 mm.
The equivalent pore size of the radial hierarchical structure of the porous material is about: 565 μm.
The above embodiments are only used for illustrating but not limiting the technical solutions of the present invention, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the invention can be modified or replaced with other equivalents, and all modifications and equivalents may be made without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A porous material radial hierarchical structure is characterized in that the porous material radial hierarchical structure comprises a plurality of tightly connected supporting pieces with different structures, and a gradient gradually-changed pore structure is formed;
the supporting pieces comprise an innermost layer supporting piece, a secondary inner layer supporting piece I, a secondary inner layer supporting piece II and an outer layer supporting piece;
the innermost support is the innermost layer of the radially-graded structure of porous material; the first secondary inner layer supporting piece and the second secondary inner layer supporting piece are sequentially used as secondary inner layers of the porous material radial hierarchical structure; the outer layer supporting piece is used as an outermost layer;
the heights of the innermost layer supporting piece, the secondary inner layer supporting piece I, the secondary inner layer supporting piece II and the outer layer supporting piece are the same.
2. The porous material radial grading structure according to claim 1, wherein the innermost layer support, the first secondary inner layer support, the second secondary inner layer support and the outer layer support are all hexagonal diamond molecular structures consisting of four cylinders with the same length.
3. A porous material radial grading structure according to claim 2, wherein the cylinder of the innermost support has a length of 0.5-1.5 mm and a diameter of 0.1-1 mm.
4. A porous material radial grading structure according to claim 2, wherein the cylinder of the first secondary inner layer support has a length of 0.5-1.5 mm and a diameter of 0.1-1 mm.
5. The radial graded structure of porous material as claimed in claim 2, wherein the second inner layer supporting member cylinder has a length of 0.5-1.5 mm and a diameter of 0.1-1 mm.
6. A porous material radial hierarchical structure according to claim 1, wherein the innermost support has an array width in the porous material radial hierarchical structure of: 4-10 mm.
7. A radial hierarchy of porous materials as in claim 1, wherein an array width of said secondary inner layer support in said radial hierarchy of porous materials is: 1-5 mm.
8. The porous material radial hierarchical structure according to claim 1, wherein the array width of the second secondary inner layer support in the porous material radial hierarchical structure is: 4-10 mm.
9. A radial hierarchy of porous materials as in claim 1, wherein the width of the array of said outer supports in the radial hierarchy of porous materials is: 1-5 mm.
10. A radial hierarchy of porous materials according to claim 1, characterized in that the equivalent pore size of the radial hierarchy of porous materials is: 300-700 μm.
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