KR102321875B1 - Metalic material for 3d printing and 3d printing method using the same - Google Patents

Abstract

A metallic material for 3D printing in accordance with an embodiment of the present invention comprises multiple metal particles, and the metal particles include a core portion including a first metal and a shell portion surrounding the core portion and including a second metal. When the metal particles are heated at a third temperature lower than a first melting point, which is the melting temperature of the first metal, and a second melting point, which is the melting temperature of the second metal, part of the first metal diffuses into the shell portion at a boundary between the core portion and the shell portion at the third temperature such that a eutectic alloy consisting of the first metal and the second metal is formed in the shell portion. When the multiple metal particles are heated to a fourth temperature higher than the eutectic melting point of the eutectic alloy, the shell portions that are included in the multiple adjacent metal particles and in contact with each other are melted, bonded to each other, and stacked to enable 3D printing at lower temperatures.

Description

Metal material for 3D printing and 3D printing method using the same

The present invention relates to a metal material for 3D printing and a 3D printing method using such a metal material.

3D printing is a technology that produces three-dimensional objects by spraying and laminating powder, liquid, and solid materials through a 3D printer. Through this, the object to be implemented is digitized into a virtual object through a three-dimensional digital drawing, and then a very thin section (about 0.015 to 0.10 mm) is stacked layer by layer to create a result. For this reason, 3D printing is also called additive manufacturing (AM).

The advantage of 3D printing is that it is possible to produce products such as models or structures with internal spaces that can be produced only through complex processes in the general manufacturing process at once. Also, without drawing a drawing, 3D printing can be performed immediately without additional processing after making a 3D drawing using a 3D scanner or using a mechanical method based on an image obtained through photography. The industry is already partially using 3D printers in the manufacturing process, and recently, the expectations and demands for a new market related to 3D printing are growing, such as producing and selling various products by applying the customized, multi-product, small-volume production process of 3D printing. am.

For 3D printing, metal materials as well as polymer materials such as plastics are being developed recently.

As a related prior art, there is Republic of Korea Patent Publication No. 10-2015-0098142 (Title of the invention: composite filament composition for 3D printer of FDM method containing metal powder).

An embodiment of the present invention is a metal material for 3D printing that can be melt laminated with a plastic material by lowering the 3D printing melting temperature by using the low melting point characteristic of the eutectic alloy, and can produce a high-strength molding, and such a metal material A 3D printing method is provided.

The problem to be solved by the present invention is not limited to the problem(s) mentioned above, and another problem(s) not mentioned will be clearly understood by those skilled in the art from the following description.

In the 3D printing method using a metal material according to an embodiment of the present invention, the metal material includes a plurality of metal particles, and the plurality of metal particles includes a core portion including a first metal and a second metal surrounding the core portion. including a shell part comprising a, and mixing the plurality of metal particles; heating the plurality of metal particles at a third temperature that is lower than the first melting point, which is the melting temperature of the first metal, and the second melting point, which is the melting temperature of the second metal; diffusing a portion of the first metal of the core part into the shell part at a boundary between the core part and the shell part; forming a eutectic alloy comprising a first metal diffused into the shell portion and a second metal included in the shell portion on the shell portion; melting the eutectic alloy formed in the shell part by heating the plurality of metal particles at a fourth temperature higher than the eutectic melting point of the eutectic alloy; and bonding the molten eutectic alloy included in the shell parts in contact with each other included in the plurality of adjacent metal particles to each other to laminate the molded product.

In the 3D printing method using a metal material according to an embodiment of the present invention, a part of the first metal of the core part is diffused into the shell part at the boundary between the core part and the shell part, and a part of the second metal part of the shell part is diffused into the core part. making; A eutectic alloy consisting of a first metal diffused into the shell portion and a second metal included in the shell portion is formed in the shell portion, and a eutectic alloy consisting of the second metal diffused into the core portion and the first metal included in the core portion. forming in the core part; melting the eutectic alloy formed in the shell part and the eutectic alloy formed in the core part by heating the plurality of metal particles at a fourth temperature higher than the eutectic melting point of the eutectic alloy formed in the shell part and the core part, respectively; and bonding the molten eutectic alloy included in the shell part of the plurality of adjacent metal particles and the molten eutectic alloy included in the core part to each other to laminate the molded product.

In the 3D printing method using a metal material according to an embodiment of the present invention, the plurality of metal particles may include metal particles in the form of powder, pellet or granular, or filament.

In the 3D printing method using a metal material according to an embodiment of the present invention, the thickness of the shell part may be 5 nm to 500 μm.

In the 3D printing method using a metal material according to an embodiment of the present invention, the eutectic alloy is AgAl, AgBa, AgBi, AgMg, AgSb, AgSr, AgTe, AgAlSn, AgAlZn, AgAuBi, AgAuSb, AgAuSn, AgAuZn, AgBiSb, AgBiSi, AgCuSb , AgCuSn, AgNiSn, AgPbSb, AgPbSn, AgSbSn, AlZn, AlCuMg, AlCuZn, AlGaIn, AlGaNi, AlGaSn, AlMgMn, AlMgSi, AlMgZn, AlSiZn, AlSnZn, AuGa, AuGe, AuNSiIn, AuPn, AuNSiIn, AuInS , BeSr, BiGa, BiIn, BiK, BiNi, BiSn, BiTi, BiZn, BiSnAu, BiGaZn, BiInPb, BiInSn, BiSbSn, BiSnZn, CaLi, CaMg, CaNa, CaZn, CeCo, CeCu, CeLi, CeNi, CePt, CuEr, Cu , CuNd, CuPr, CuSr, CuInSn, CuMgSi, CuMgZn, CuNiSn, CuPbAu, CuSnAu, GaIn, GaMg, GeZn, InSb, InSn, InPbAu, InSbSn, SnSnZn, LiSn, LiSr, LiZn, MgSn, MgSn , PbSn, PbSr, PbTe, PbPdSn, SnZn or SrZn.

A metal material for 3D printing according to an embodiment of the present invention includes a core portion including a plurality of metal particles, wherein the metal particles include a first metal; and a shell part surrounding the core part and including a second metal, wherein the plurality of metal particles have a third temperature lower than a first melting point that is a melting temperature of the first metal and a second melting point that is a melting temperature of the second metal. When heated in , a portion of the first metal of the core portion is diffused into the shell portion at the boundary between the core portion and the shell portion to form a eutectic alloy consisting of the first metal and the second metal in the shell portion, and the plurality of metal particles When heated to a fourth temperature higher than the eutectic melting point of the eutectic alloy, the shell parts included in the plurality of adjacent metal particles in contact with each other may be melted and combined with each other.

When the metal material for 3D printing according to an embodiment of the present invention is heated at the third temperature, a portion of the second metal of the shell part is diffused into the core part at the boundary between the core part and the shell part, so that the first metal and the second A eutectic alloy made of a metal is formed in the core part, and a fourth temperature is higher than the eutectic point of the eutectic alloy formed in the shell part and the eutectic alloy formed in the core part, and when heated to a fourth temperature, the plurality of adjacent metals The eutectic alloys formed in the shell part and the core part of the particle may be melted and bonded to each other.

In the metal material for 3D printing according to an embodiment of the present invention, the plurality of metal particles may include metal particles in the form of powder, pellet or granular, or filament.

In the metal material for 3D printing according to an embodiment of the present invention, the thickness of the shell part may be 5 nm to 500 μm.

In the metal material for 3D printing according to an embodiment of the present invention, the eutectic alloy is AgAl, AgBa, AgBi, AgMg, AgSb, AgSr, AgTe, AgAlSn, AgAlZn, AgAuBi, AgAuSb, AgAuSn, AgAuZn, AgBiSb, AgBiSi, AgCuSb, AgCuSn , AgNiSn, AgPbSb, AgPbSn, AgSbSn, AlZn, AlCuMg, AlCuZn, AlGaIn, AlGaNi, AlGaSn, AlMgMn, AlMgSi, AlMgZn, AlSiZn, AlSnZn, AuGa, AuGe, AuIn, AuBiSn, AuNSi, , BiGa, BiIn, BiK, BiNi, BiSn, BiTi, BiZn, BiSnAu, BiGaZn, BiInPb, BiInSn, BiSbSn, BiSnZn, CaLi, CaMg, CaNa, CaZn, CeCo, CeCu, CeLi, CeNi, CePt, CuEr, CuLa, CuN , CuPr, CuSr, CuInSn, CuMgSi, CuMgZn, CuNiSn, CuPbAu, CuSnAu, GaIn, GaMg, GeZn, InSb, InSn, InPbAu, InSbSn, SnSnZn, LiSn, LiSr, LiZn, MgSn, MgSn NaSn, MgYb , PbSr, PbTe, PbPdSn, SnZn or SrZn.

According to an embodiment of the present invention, the molding can be melt-laminated at a low temperature by using the eutectic melting point of the eutectic metal material, and it can be used with plastic, thereby simplifying the process and manufacturing the high-strength molding.

1 is a view schematically showing an example of a metal material for 3D printing according to an embodiment of the present invention.
2 is a view showing a state diagram of a eutectic alloy including a first metal and a second metal.
3 to 5 are views showing changes in the state and structure when laminating a molding using a metal material for 3D printing according to an embodiment of the present invention.
6 and 7 are flowcharts for explaining each step of the 3D printing method according to an embodiment of the present invention.

Advantages and/or features of the present invention, and methods of achieving them, will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view schematically showing an example of a metal material for 3D printing according to an embodiment of the present invention.

The metal material for 3D printing according to an embodiment of the present invention includes a plurality of metal particles. 1 is a view showing an example of two metal particles in contact with each other, one metal particle may be in contact with two or more different metal particles. The metal particles may include a central core portion 11 and a shell portion 13 surrounding the core portion 11 . The shell part 13 may be formed through a vacuum deposition method or a wet deposition method with the core part 11 as a center. The vacuum deposition method may be selected as any one of atomic layer deposition (ALD), chemical deposition (CVD), or physical deposition (PVD). The wet deposition method may be selected as any one of spray, dipping, or puddle.

The core part 11 may include a first metal, and the shell part 13 may include a second metal, and the first metal and the second metal are in a relationship capable of forming a eutectic alloy. have. Each of the first metal and the second metal may include a single element or may include two or more elements. The eutectic alloy formed of the first metal and the second metal is AgAl, AgBa, AgBi, AgMg, AgSb, AgSr, AgTe, AgAlSn, AgAlZn, AgAuBi, AgAuSb, AgAuSn, AgAuZn, AgBiSb, AgBiSi, AgCuSb, AgCuSn, AgPbSb , AgPbSn, AgSbSn, AlZn, AlCuMg, AlCuZn, AlGaIn, AlGaNi, AlGaSn, AlMgMn, AlMgSi, AlMgZn, AlSiZn, AlSnZn, AuGa, AuGe, AuIn, AuPb, AuSi, AuBiSb, AuInSb, AuInSn , BiK, BiNi, BiSn, BiTi, BiZn, BiSnAu, BiGaZn, BiInPb, BiInSn, BiSbSn, BiSnZn, CaLi, CaMg, CaNa, CaZn, CeCo, CeCu, CeLi, CeNi, CePt, CuEr, CuLa, CuNd, CuPr, CuSr , CuInSn, CuMgSi, CuMgZn, CuNiSn, CuPbAu, CuSnAu, GaIn, GaMg, GeZn, InSb, InSn, InPbAu, InSbSn, SnSnZn, LiSn, LiSr, LiZn, MgSn, MgSn, MgSr, PbSn, MgYb, PbZnTe, NaSn, MgTb , PbPdSn, SnZn or SrZn.

1 illustrates a spherical metal particle as an example, but is not limited thereto, and may be formed in the form of powder, granular (pellet or granular) or filament. The size of the metal particles may be 5 nm to 1 mm. The thickness of the shell part 13 may be 5 nm to 500 μm.

2 is a diagram illustrating a state diagram of an eutectic alloy including a first metal and a second metal.

Referring to FIG. 2 , in the bismuth (Bi) and tin (Sn) eutectic alloy, state information according to temperature can be seen as the molar ratio of tin (Sn) to bismuth (Bi) increases. It can be seen that the melting point of pure bismuth (Bi) is about 545K, and the melting point of pure tin (Sn) is about 505K. In addition, it can be seen that when the molar ratio of tin (Sn) is about 0.61, the melting point, that is, the melting point is about 411K. Referring to the phase diagram according to FIG. 2 , it can be seen that the melting point, ie, the eutectic point, of these eutectic alloys is lower than that of pure bismuth (Bi) or pure tin (Sn). It can be seen that the melting point of the bismuth (Bi) and tin (Sn) eutectic alloy is about 75% of the melting point of pure bismuth (Bi), and about 81% of the melting point of pure tin (Sn). That is, since the melting point of the eutectic alloy can be reached by heating at a temperature lower than the heating temperature required for molding with a pure single metal, easier and more economical molding may be possible.

3 to 5 are views showing changes in the state and structure when laminating a molding using a metal material for 3D printing according to an embodiment of the present invention.

Referring to FIG. 3 , the metal particles constituting the metal material have a first melting point that is a melting temperature of the first metal included in the core part 11 and a second melting point that is a melting temperature of the second metal included in the shell part 13 . When heated at a lower third temperature, a portion of the first metal included in the core part 11 may diffuse into the shell part 13 at the boundary between the core part 11 and the shell part 13 . The diffused first metal may form a eutectic alloy with the second metal included in the shell part 13 . The third temperature may be a constant temperature, but is not limited thereto, and may be a variable temperature in a range lower than the first melting point and the second melting point if it can cause diffusion of the first metal. By controlling the heating time to the third temperature, the amount of diffusion of a part of the first metal into the shell part 13 can be controlled, and as shown in FIG. 2 according to the molar ratio of the diffused first metal and the second metal. The eutectic melting point of the eutectic alloy is determined.

Referring to FIG. 4 , when the metal particles are heated to a fourth temperature higher than the eutectic melting point of the eutectic alloy, the shell parts included in the adjacent metal particles and in contact with each other are melted and combined with each other. The fourth temperature may be a constant temperature, but is not limited thereto, and may be a variable temperature in a range higher than the eutectic melting point if it can cause the melting of the eutectic alloy formed in the shell part 13 . By adjusting the heating time to the fourth temperature, it is possible to control the degree of bonding of the shell parts of adjacent metal particles. After the shell parts of adjacent metal particles are melted and combined, the metal-based high-strength molding may be laminated through a cooling process.

Referring to FIG. 5 , a portion of the second metal included in the shell part 13 may diffuse into the core part 11 at the boundary between the core part 11 and the shell part 13 when heated at the third temperature. The diffused second metal may form a eutectic alloy with the first metal included in the core part 11 . The molar ratio of the first metal and the second metal may be different between the eutectic alloy formed in the core part 11 formed by heating to a third temperature and the eutectic alloy formed in the shell part 13, but the third temperature range and heating time may be different. It can also be adjusted so that the molar ratio can be the same by adjusting. By heating the plurality of metal particles to a fourth temperature higher than the eutectic melting point of the eutectic alloy formed in the core part 11 and the shell part 13, respectively, the eutectic alloy formed in the core part 11 and the shell part 13 can be melted. have. The adjacent metal particles including the molten eutectic alloy in the core part 11 and the shell part 13 may be bonded to each other in order to minimize surface energy. By adjusting the fourth temperature range and controlling the heating time, the degree of melting the eutectic alloy of the core part 11 and the shell part 13 and the degree of bonding thereof can be controlled. After the core and shell parts of adjacent metal particles are melted and combined, the metal-based high-strength molding may be laminated through a cooling process.

The heating of the third temperature and the fourth temperature may use a laser melting and sintering method (Selective laser sintering), but is not limited thereto, and the FDM (Fused Deposition Modeling) method, ME (material extrusion) method, MJ (material jetting) method may be used. method, direct energy deposition (DED), power bed fusion (PBF), polyjet or hot-melt method may be used.

6 and 7 are flowcharts for explaining each step of the 3D printing method according to an embodiment of the present invention.

Referring to FIG. 6 , a plurality of metal particles are mixed to prepare a metal material for 3D printing according to an embodiment of the present invention (S1). The metal particles include a core portion including a first metal and a shell portion surrounding the core portion and including a second metal. The plurality of mixed metal particles are heated at a third temperature lower than the first melting point, which is the melting temperature of the first metal, and the second melting point, which is the melting temperature of the second metal (S2). By heating to a third temperature, a portion of the first metal of the core part is diffused into the shell part at the boundary between the core part and the shell part (S3). A eutectic alloy composed of the first metal diffused into the shell portion and the second metal included in the shell portion is formed on the shell portion (S4). The eutectic alloy formed in the shell is melted by heating the plurality of metal particles at a fourth temperature higher than the eutectic melting point of the eutectic alloy (S5). The molten eutectic alloy included in the shell parts in contact with each other included in a plurality of adjacent metal particles is combined with each other and laminated into a molded product (S6). The laminated molding is cooled to complete the final product.

Referring to FIG. 7 , each of steps S3 to S6 according to FIG. 6 is a step of diffusing a part of the first metal of the core part into the shell part at the boundary between the core part and the shell part, and diffusing a part of the second metal part of the shell part into the core part ( S3), forming an eutectic alloy consisting of a first metal diffused into the shell portion and a second metal included in the shell portion on the shell portion, and forming a eutectic alloy consisting of the second metal diffusion into the core portion and the first metal included in the core portion as a core Forming in the part (S4), heating a plurality of metal particles at a fourth temperature higher than the eutectic melting point of the eutectic alloy formed in the shell part and the core part, respectively, melting the eutectic alloy formed in the shell part and the eutectic alloy formed in the core part (S5) and a step (S6) of laminating a molded product by bonding the molten eutectic alloy included in the shell part of the adjacent plurality of metal particles and the molten eutectic alloy included in the core part to each other.

In addition, the detailed description is the same as that described in the embodiment of the metal material for 3D printing, and thus a redundant description will be omitted.

Although specific embodiments according to the present invention have been described so far, various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims described below as well as the claims and equivalents.

As described above, although the present invention has been described with reference to the limited examples and drawings, the present invention is not limited to the above examples, which are various modifications and Transformation is possible. Accordingly, the spirit of the present invention should be understood only by the claims described below, and all equivalents or equivalent modifications thereof will fall within the scope of the spirit of the present invention.

11: core
13: shell part
15: eutectic alloy

Claims (10)

In the 3D printing method using a metal material,
The metal material includes a plurality of metal particles, and the plurality of metal particles includes a core portion including a first metal and a shell portion surrounding the core portion and including a second metal,
i) mixing the plurality of metal particles;
ii) heating the plurality of metal particles at a third temperature that is lower than the first melting point, which is the melting temperature of the first metal, and the second melting point, which is the melting temperature of the second metal;
iii) diffusing a portion of the first metal of the core part into the shell part at the boundary between the core part and the shell part;
iv) forming an eutectic alloy on the shell portion comprising a first metal diffused into the shell portion and a second metal included in the shell portion;
v) melting the eutectic alloy formed in the shell portion by heating the plurality of metal particles at a fourth temperature higher than the eutectic melting point of the eutectic alloy; and
vi) bonding the molten eutectic alloy included in the shell parts that are included in the plurality of adjacent metal particles in contact with each other and stacking them into a molded product; 3D printing using a metal material comprising the steps of: Way.
According to claim 1,
Steps iii) to vi) are,
iii) diffusing a portion of the first metal of the core portion into the shell portion at a boundary between the core portion and the shell portion, and diffusing a portion of the second metal portion of the shell portion into the core portion;
iv) A eutectic alloy composed of a first metal diffused into the shell portion and a second metal included in the shell portion is formed in the shell portion, and a second metal diffused into the core portion and a first metal included in the core portion are formed. forming a eutectic alloy on the core part;
v) melting the eutectic alloy formed in the shell portion and the eutectic alloy formed in the core portion by heating the plurality of metal particles at a fourth temperature higher than the eutectic melting point of the eutectic alloy formed in the shell portion and the core portion, respectively; and
vi) combining the molten eutectic alloy included in the shell part of the plurality of adjacent metal particles and the molten eutectic alloy included in the core part with each other to laminate the molded product; 3D printing using a metal material, characterized in that Way.
According to claim 1,
The plurality of metal particles is a 3D printing method using a metal material, characterized in that it comprises metal particles in the form of powder, granular (pellet or granular) or filament (filament).
According to claim 1,
3D printing method using a metal material, characterized in that the thickness of the shell portion is 5nm to 500㎛.
According to claim 1,
The eutectic alloy is AgAl, AgBa, AgBi, AgMg, AgSb, AgSr, AgTe, AgAlSn, AgAlZn, AgAuBi, AgAuSb, AgAuSn, AgAuZn, AgBiSb, AgBiSi, AgCuSb, AgCuSn, AgNiSn, AgPbSb, AgSbSg, AgPbSb, AgSbSg AlCuZn, AlGaIn, AlGaNi, AlGaSn, AlMgMn, AlMgSi, AlMgZn, AlSiZn, AlSnZn, AuGa, AuGe, AuIn, AuPb, AuSi, AuBiSb, AuInSb, AuInSn, AuNiSn, BeSr, BiTi, BiIn, BiSn, BiNi, BiSn, BiNi BiZn, BiSnAu, BiGaZn, BiInPb, BiInSn, BiSbSn, BiSnZn, CaLi, CaMg, CaNa, CaZn, CeCo, CeCu, CeLi, CeNi, CePt, CuEr, CuLa, CuNd, CuPr, CuSr, CuInSn, CuMgSi, CuMgZn, CuNiS CuPbAu, CuSnAu, GaIn, GaMg, GeZn, InSb, InSn, InPbAu, InSbSn, SnSnZn, LiSn, LiSr, LiZn, MgSn, MgSr, MgYb, MgZn, NaSn, PbSn, PbSr, PbTe, PbP 3D printing method using a metal material.
In the metal material for 3D printing,
The metal material includes a plurality of metal particles,
The metal particles may include a core portion including a first metal; and a shell part surrounding the core part and including a second metal;
When the plurality of metal particles are heated at a third temperature lower than the first melting point, which is the melting temperature of the first metal, and the second melting point, which is the melting temperature of the second metal, the core part is formed at the boundary between the core part and the shell part. A part of one metal is diffused into the shell part to form a eutectic alloy consisting of a first metal and a second metal in the shell part,
When the plurality of metal particles are heated to a fourth temperature higher than the eutectic melting point of the eutectic alloy, the shell parts which are included in the plurality of adjacent metal particles and are in contact with each other are melted and combined with each other 3D Metal material for printing.
7. The method of claim 6,
When heated at the third temperature, a portion of the second metal of the shell portion is diffused into the core portion at the boundary between the core portion and the shell portion to form a eutectic alloy composed of the first metal and the second metal in the core portion,
The fourth temperature is higher than the eutectic point of the eutectic alloy formed in the shell part and the eutectic alloy formed in the core part, and when heated to the fourth temperature, the eutectic alloys formed in the shell part and the core part of the adjacent plurality of metal particles are melted Metal materials for 3D printing, characterized in that they are combined with each other.
7. The method of claim 6,
The plurality of metal particles is a metal material for 3D printing, characterized in that it comprises metal particles in the form of powder, granular (pellet or granular) or filament (filament).
7. The method of claim 6,
A metal material for 3D printing, characterized in that the shell portion has a thickness of 5 nm to 500 μm.
7. The method of claim 6,
The eutectic alloy is AgAl, AgBa, AgBi, AgMg, AgSb, AgSr, AgTe, AgAlSn, AgAlZn, AgAuBi, AgAuSb, AgAuSn, AgAuZn, AgBiSb, AgBiSi, AgCuSb, AgCuSn, AgNiSn, AgPbSb, AgSbSg, AgPbSb, AgSbSg AlCuZn, AlGaIn, AlGaNi, AlGaSn, AlMgMn, AlMgSi, AlMgZn, AlSiZn, AlSnZn, AuGa, AuGe, AuIn, AuPb, AuSi, AuBiSb, AuInSb, AuInSn, AuNiSn, BeSr, BiTi, BiIn, BiSn, BiNi, BiSn, BiNi BiZn, BiSnAu, BiGaZn, BiInPb, BiInSn, BiSbSn, BiSnZn, CaLi, CaMg, CaNa, CaZn, CeCo, CeCu, CeLi, CeNi, CePt, CuEr, CuLa, CuNd, CuPr, CuSr, CuInSn, CuMgSi, CuMgZn, CuNiS CuPbAu, CuSnAu, GaIn, GaMg, GeZn, InSb, InSn, InPbAu, InSbSn, SnSnZn, LiSn, LiSr, LiZn, MgSn, MgSr, MgYb, MgZn, NaSn, PbSn, PbSr, PbTe, PbP metal material for 3D printing.

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