CN107973607B - Selective laser melting/sintering forming method for ceramic slurry without binder - Google Patents

Selective laser melting/sintering forming method for ceramic slurry without binder Download PDF

Info

Publication number
CN107973607B
CN107973607B CN201610921872.0A CN201610921872A CN107973607B CN 107973607 B CN107973607 B CN 107973607B CN 201610921872 A CN201610921872 A CN 201610921872A CN 107973607 B CN107973607 B CN 107973607B
Authority
CN
China
Prior art keywords
ceramic
slurry
layer
powder
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201610921872.0A
Other languages
Chinese (zh)
Other versions
CN107973607A (en
Inventor
刘婷婷
张凯
张长东
闫以帅
廖文和
杜道中
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing Tech University
Original Assignee
Nanjing Tech University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nanjing Tech University filed Critical Nanjing Tech University
Priority to CN201610921872.0A priority Critical patent/CN107973607B/en
Publication of CN107973607A publication Critical patent/CN107973607A/en
Application granted granted Critical
Publication of CN107973607B publication Critical patent/CN107973607B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/62605—Treating the starting powders individually or as mixtures
    • C04B35/62625—Wet mixtures
    • C04B35/6264—Mixing media, e.g. organic solvents
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/64—Burning or sintering processes
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3244—Zirconium oxides, zirconates, hafnium oxides, hafnates, or oxide-forming salts thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/66—Specific sintering techniques, e.g. centrifugal sintering
    • C04B2235/665—Local sintering, e.g. laser sintering
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/74—Physical characteristics
    • C04B2235/77—Density
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

The invention discloses a selective laser melting/sintering forming method of ceramic slurry without a binder, which comprises the steps of firstly mixing ceramic powder and water in proportion to form suspension slurry, presetting a slurry layer with the thickness of 30-150 mu m on the surface of a forming substrate, heating and evaporating to remove most of water, scanning a powder layer with partial water removed by using a continuous fiber laser according to cutting data by adopting an SLM/SLS forming technology, repeating the process from presetting of the powder layer to printing for multiple times, and overlapping layer by layer to obtain a ceramic forming part. Compared with powder, the evaporated ceramic slurry has higher original density and more uniform powder distribution, and meanwhile, the preset slurry powder layer is not easy to splash under the impact of laser due to the action of residual moisture. By adopting the selective laser melting/sintering forming method for ceramic slurry, ceramic parts with relative density of more than 93 percent and Vickers hardness of more than 1500MPa can be obtained.

Description

Selective laser melting/sintering forming method for ceramic slurry without binder
Technical Field
The invention belongs to the technical field of Selective Laser Melting/sintering (SLM/SLS) forming, and relates to a binder-free SLM/SLS forming method for ceramic slurry.
Background
The ceramic material has the advantages of high strength, high hardness, corrosion resistance, wear resistance, high temperature resistance, good heat insulation and the like, and shows increasingly wide application prospects in the fields of energy, mechano-electronics, aerospace, computers, bioengineering and the like. However, the difficulty of processing and forming complex ceramic parts is always a great difficulty in restricting the application of ceramics.
The existing ceramic parts are formed by hot-pressing sintering. In the hot-pressing sintering, a certain external force (generally, the pressure is between 10 and 40Mpa, and depends on the strength which can be borne by the material of the die) is applied at the same time in the sintering process, so that the material is accelerated to flow, rearrange and densify. The density of the product obtained by hot-pressing sintering is higher and can reach more than 99% of the theoretical density, the growth of crystal grains is inhibited due to the sintering at lower temperature, and the obtained sintered crystal grains are finer and have higher strength. However, the hot-pressing sintering has the disadvantages of complex process and equipment, strict production control requirement, high requirement on die materials, high energy consumption, low production efficiency and high production cost.
The SLM/SLS is an additive manufacturing technology developed in recent years, and based on the basic principle of additive manufacturing, a part with a specific geometric shape is directly formed by utilizing a mode of stacking 'growing' discrete materials layer by layer and has the advantages of high precision, high material utilization rate, good part compactness, simple process and the like. Ceramic powders and binder-added ceramic slurries are common forming materials. The powder forming ceramic part has the problems of difficult powder laying, low density of a preset powder layer and the like. When ceramic parts are formed by using the ceramic slurry with the binder, complicated post-treatments such as degreasing are required, and the steps are complicated. Chen Sihan et al used SLS technique to add SiO2SiO of sol2Sintering the slurry to prepare the three-dimensional SiO2The ceramic nozzle green body is actually used, but it is necessary to carry out post-treatments such as grinding, infiltration and sintering (Chenshin et al, research on ceramic original production by selective laser sintering technique [ J]Journal of the university of west ampere, 2011,45(11). Hsiao-Chuan Yen proposes a method for preparing SiO by adding silica sol and polyvinyl alcohol as binders2Slurry, then forming ceramic piece by laser scanning, but the formed original piece needs to be treated with 1200 ℃ heat to remove the polyvinyl alcohol material (Hsiao-Chuan Yen. A new slurry-based drying process for manufacturing ceramic piece green layer [ J-J].Journal of theEuropean Ceramic Society,2012,32(12):3123-3128)。
Disclosure of Invention
The invention aims to provide a selective laser melting/sintering forming method of ceramic slurry without a binder, which is characterized in that ceramic powder is dispersed in water to prepare ceramic slurry without the binder, most of water in a powder layer is removed by evaporation to obtain a densified ceramic powder layer, and a ceramic part is formed by adopting an SLM/SLS technology.
A selective laser melting/sintering forming method of ceramic slurry without a binder comprises the following specific steps:
step 1, dispersing ceramic material powder in water, stirring and mixing uniformly to prepare ceramic suspension slurry with the mass concentration of 30-70%;
step 2, presetting a slurry layer with the thickness of 30-150 microns on the surface of a formed substrate by the prepared ceramic suspension slurry, heating the preset ceramic slurry layer at 80-120 ℃, and evaporating to remove 80-95% of water;
step 3, scanning the powder layer with partial moisture removed by using laser according to the layer cutting data by adopting an SLM/SLS forming method, and cooling the temperature of a melting or sintering area to 50-130 ℃ after scanning is finished;
and 4, taking the surface of the processing layer formed in the step 3 as a slurry preset surface, repeating the step 2 and the step 3, and stacking layer by layer to obtain the ceramic forming part.
In step 1, the ceramic material may be a single or composite ceramic material, and may be selected from Al2O3、ZrO2、Y2O3、Na2O、Nb2O5、La2O3、CaO、SrO、CeO2、MgO、SiO2、TiO2、Cr2O3、CuO、Eu2O3、Er2O3、CoO、Gd2O3One or more of them.
Wherein the ceramic material is Al2O3And ZrO2When composed of a composite ceramic material, Al2O3And ZrO2The proportion of the active ingredients is 50-80 percent and 20-50 percent respectively.
The present invention obtains a uniform binder-free ceramic suspension slurry by dispersing a single or composite ceramic powder in water. The slurry is then laid on a substrate, and the presence of water in the slurry wets the surface of the ceramic material particles, and the particles are adsorbed together by a water film. In the process of evaporation at the temperature of 80-120 ℃, most of water is evaporated, but a small part of water exists as water molecules and film water due to the huge binding force between the water molecules and the ceramic particles. Due to the surface tension of water, the particles are mutually close and polymerized, so that the powder layer is gradually densified, and a dense and uniform powder layer is obtained. According to the SLM/SLS forming principle, the relationship between the density of the preset powder layer and the final density of the formed part is large, and the ceramic slurry can effectively improve the density of the powder layer so as to effectively improve the final density of the ceramic test piece. Moreover, when ceramic powder is used as a raw material preset powder layer, the powder is loosely stacked, pores are filled among particles, the adhesion force between the particles and a substrate is small, and the impact force during laser scanning cannot be resisted sufficiently, so that a large amount of powder splashes, and a ceramic test piece is difficult to form. The ceramic slurry of the invention is agglomerated together during the evaporation process, the contact area is increased, the adhesion force is strong, and the ceramic slurry can bear the laser impact.
Compared with ceramic slurry or ceramic powder added with a binder, the ceramic slurry added with water only is used for preparing the ceramic parts, the water plays a role in binding before and during the forming process, the problems that powder is difficult to spread and the powder is easy to splash during the forming process are solved, and the density of the preset powder layer is improved to a great extent; after the ceramic slurry is formed, the water is completely evaporated, and complicated subsequent treatment steps are not needed, the ceramic part with a certain shape and higher density and hardness compared with the traditional processing mode can be obtained by adopting the ceramic slurry prepared by the process through an SLM/SLS forming technology, wherein the micro Vickers hardness of the ceramic formed part is at least 1500MPa, which can reach 1750MPa, the relative density is at least 93 percent, and the highest density reaches 99 percent.
Drawings
FIG. 1 shows Al prepared in example 12O3And (3) a final preset powder layer effect diagram of the ceramic slurry.
FIG. 2 shows Al prepared in example 12O3Scanning electron micrographs of a pre-set powder layer of ceramic slurry.
FIG. 3 shows Al prepared in example 12O3Ceramic slurry is used as a raw material to prepare ceramic part pictures through an SLM forming process.
FIG. 4 shows Al prepared in example 12O3And (3) taking the ceramic slurry as a raw material, and preparing a scanning electron microscope picture of the ceramic part by using an SLM (selective laser melting) forming process.
Detailed Description
The present invention will be described in more detail with reference to the following examples and the accompanying drawings.
The Vickers hardness in examples and comparative examples was measured using a Vickers hardness tester model HV-50, manufactured by Shanghai dinning optical instruments Co., Ltd, using a square pyramid diamond indenter, pressed into the surface of a test piece under a test force, and after a prescribed time, the test force was removed and the length of the diagonal line of the indentation in the surface of the test piece was measured. The vickers hardness value is the quotient of the test force divided by the surface area of the indentation.
The relative density tests in the examples and the comparative examples adopt a drainage method for testing, the weight of a test piece immersed in air and liquid is measured according to the Archimedes principle, the buoyancy force of the material in the liquid can be calculated, so that the volume of the test piece is calculated, then the weight of the test piece is weighed, the weight and the volume of the test piece are divided to obtain the density of the material, and then the measured density is divided by the theoretical density to obtain the relative density of the test piece.
Example 1
According to the mass ratio of 1: 1 proportion of Al with an average particle size of 0.62 μm2O3And pure distilled water, stirring for 10min with an electromagnetic stirring rod to prepare ceramic slurry; then, using the ceramic slurry to preset a slurry powder layer with the thickness of 50 microns on a ceramic substrate; preheating the preset slurry powder layer to 110 ℃ by using an induction heating system, keeping the temperature for 2min until the water in the preset slurry layer is evaporated by 80-95%, as shown in figure 1, the powder layer is flat and smooth and has certain viscosity, can bear the impact of laser energy and is not easy to splash, as shown in figure 2, a scanning electron microscope high-power picture of the preset slurry layer in figure 1 is shown, and it can be seen that the surface of the preset powder layer has no gap and the density is very high; then, scanning and printing the layer by using a laser according to the three-dimensional data; the layer after scanning and printing is cooled to 50 toAbout 130 ℃; the process from the preset powder layer to the printing is repeated for a plurality of times to obtain the final ceramic forming part, as shown in fig. 3, the forming ceramic part is a square block with the thickness of 10 multiplied by 10mm and the height of 2mm, the surface is smooth, and fig. 4 shows a high-power scanning electron microscope photo of the surface of the ceramic part in fig. 3, so that the surface of the ceramic part formed by the ceramic slurry is completely melted, flat and crack-free, and the forming quality is good.
The average value of the micro Vickers hardness of the ceramic part prepared by the ceramic slurry prepared by the process through the SLM forming process is about 1500MPa, and the relative density is about 95%.
Example 2
According to the mass ratio of 7: 3 weighing Al with average particle size of 2 μm2O3And pure distilled water, stirring for 10min with an electromagnetic stirring rod to prepare ceramic slurry; then, using the ceramic slurry to preset a slurry powder layer with the thickness of 50 microns on a ceramic substrate; preheating the preset slurry powder layer to 110 ℃ by using an induction heating system, and keeping the temperature for 2min until the moisture in the preset slurry layer is evaporated by 80-95%; then, scanning and printing the layer by using a laser according to the three-dimensional data; cooling the layer after scanning and printing to about 50-130 ℃; and repeating the process from the preset powder layer to printing for multiple times to obtain the final ceramic forming part.
The average value of the micro Vickers hardness of the ceramic part prepared by the ceramic slurry prepared by the process through the SLM forming process is about 1550MPa, and the relative compactness is about 94%.
Example 3
According to the mass ratio of 80%: 20% by weight of Al having an average particle diameter of 0.62 μm2O3And ZrO2Ceramic powder, and then mixing the ceramic powder and pure distilled water according to the mass ratio of 1: 1, weighing pure distilled water according to the proportion; mixing in a glass container and stirring for 10min by using an electromagnetic stirring rod to prepare ceramic slurry; then, using the ceramic slurry to preset a slurry powder layer with the thickness of 30 microns on a ceramic substrate; preheating the preset slurry powder layer to 110 ℃ by using an induction heating system, and keeping the temperature for 2min until the moisture in the preset slurry layer is evaporated by 80-95%; then using the laser based on the three-dimensional dataScanning and printing the layer by an optical device; cooling the layer after scanning and printing to about 50-130 ℃; and repeating the process from the preset powder layer to printing for multiple times to obtain the final ceramic forming part.
The average value of the micro Vickers hardness of the ceramic part prepared by the ceramic slurry prepared by the process through the SLM forming process is about 1540MPa, and the relative compactness is about 95%.
Example 4
According to the mass ratio of 50%: 50% by weight of Al having an average particle diameter of 0.62 μm2O3And ZrO2Ceramic powder, and then mixing the ceramic powder and pure distilled water according to the mass ratio of 3: 7, weighing pure distilled water according to the proportion; mixing in a glass container and stirring for 10min by using an electromagnetic stirring rod to prepare ceramic slurry; then, using the ceramic slurry to preset a slurry powder layer with the thickness of 30 microns on a ceramic substrate; preheating the preset slurry powder layer to 110 ℃ by using an induction heating system, and keeping the temperature for 2min until the moisture in the preset slurry layer is evaporated by 80-95%; then, scanning and printing the layer by using a laser according to the three-dimensional data; cooling the layer after scanning and printing to about 50-130 ℃; and repeating the process from the preset powder layer to printing for multiple times to obtain the final ceramic forming part.
The average value of the micro Vickers hardness of the ceramic part prepared by the ceramic slurry prepared by the process through the SLM forming process is about 1580MPa, and the relative density is about 98%.

Claims (2)

1. A selective laser melting/sintering forming method of ceramic slurry without a binder is characterized by comprising the following specific steps:
step 1, dispersing ceramic material powder in water, stirring and mixing uniformly to prepare ceramic suspension slurry with the mass concentration of 30-70%;
step 2, presetting a slurry layer with the thickness of 30-150 microns on the formed substrate by the prepared ceramic suspension slurry, heating the preset ceramic slurry layer at 80-120 ℃, and evaporating to remove 80-95% of water;
step 3, scanning the powder layer with partial moisture removed by using laser according to the layer cutting data by adopting an SLM/SLS forming method, and cooling the temperature of a melting or sintering area to 50-130 ℃ after scanning is finished;
step 4, taking the surface of the processing layer formed in the step 3 as a slurry preset surface, repeating the step 2 and the step 3, and stacking layer by layer to obtain a ceramic forming part;
wherein the ceramic material is Al2O3、ZrO2At least one of (1).
2. The selective laser melting/sintering method of binderless ceramic slurry of claim 1 wherein said ceramic material is Al2O3And ZrO2Composite ceramic material of composition, Al2O3And ZrO2The proportion of the water-soluble organic acid is 50-80% and 20-50% respectively.
CN201610921872.0A 2016-10-21 2016-10-21 Selective laser melting/sintering forming method for ceramic slurry without binder Active CN107973607B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610921872.0A CN107973607B (en) 2016-10-21 2016-10-21 Selective laser melting/sintering forming method for ceramic slurry without binder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610921872.0A CN107973607B (en) 2016-10-21 2016-10-21 Selective laser melting/sintering forming method for ceramic slurry without binder

Publications (2)

Publication Number Publication Date
CN107973607A CN107973607A (en) 2018-05-01
CN107973607B true CN107973607B (en) 2020-02-07

Family

ID=62004788

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610921872.0A Active CN107973607B (en) 2016-10-21 2016-10-21 Selective laser melting/sintering forming method for ceramic slurry without binder

Country Status (1)

Country Link
CN (1) CN107973607B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108610052A (en) * 2018-05-17 2018-10-02 广东工业大学 A kind of titanium diboride base complex phase ceramic and its preparation method and application
CN109111233A (en) * 2018-06-19 2019-01-01 广东工业大学 A kind of TiB2Ceramics increase the manufacturing method of material
CN109734425B (en) * 2019-02-20 2020-10-02 华中科技大学 Laser selective rapid forming method of complex phase ceramic casting mold and product thereof
CN112521139B (en) * 2019-09-03 2022-09-23 南京优登科技有限公司 Cross-scale porous ceramic and preparation method thereof
CN112521138B (en) * 2019-09-03 2022-09-23 南京优登科技有限公司 Diatomite porous body and preparation method thereof
CN111689764B (en) * 2020-07-06 2022-05-31 南京理工大学 Low-cost preparation of ceramic powder for selective laser melting and defocusing forming method thereof
CN114409388A (en) * 2022-01-27 2022-04-29 兰州文理学院 Material for 3D printing of brick carving in summer and manufacturing method thereof
CN115093219A (en) * 2022-08-26 2022-09-23 季华实验室 Preparation method of porous anode support based on selective laser melting molding

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103551492A (en) * 2013-11-13 2014-02-05 南昌航空大学 Precoated sand material applicable to laser sintering of magnesium alloy, and preparation method thereof
CN104476653A (en) * 2014-11-28 2015-04-01 中南大学 Three-dimensional (3D) printing and manufacturing method of porous niobium parts

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2798281B2 (en) * 1989-10-31 1998-09-17 龍三 渡辺 Particle array laser sintering method and apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103551492A (en) * 2013-11-13 2014-02-05 南昌航空大学 Precoated sand material applicable to laser sintering of magnesium alloy, and preparation method thereof
CN104476653A (en) * 2014-11-28 2015-04-01 中南大学 Three-dimensional (3D) printing and manufacturing method of porous niobium parts

Also Published As

Publication number Publication date
CN107973607A (en) 2018-05-01

Similar Documents

Publication Publication Date Title
CN107973607B (en) Selective laser melting/sintering forming method for ceramic slurry without binder
TWI657146B (en) METHOD OF GRAIN BOUNDARY DIFFUSION FOR R-Fe-B BASED RARE-EARTH SINTERED MAGNET, HRE DIFFUSION SOURCE AND PREPARATION METHOD THEREOF
JP7383738B2 (en) Powder for ceramic modeling, ceramic modeling, and manufacturing method thereof
CN101503297B (en) Tape casting preparation for gradient material in rotating magnetic field
CN112321286A (en) Multilayer porous ceramic material and preparation method thereof
CN108409330B (en) Method for preparing compact silicon carbide ceramic through 3D forming
CN108439987B (en) Method for preparing silicon carbide ceramic with controllable aperture through 3D forming
CN110252156A (en) A kind of metal composite ceramal film and preparation method thereof
CN113135757A (en) Ceramic primary blank forming method based on microwave in-situ sintering and product
CN104628392B (en) Preparation method of compact aluminum nitride-boron nitride composite material
CN110467475A (en) A kind of preparation method of gradient function ceramics
CN1915626B (en) Method for preparing gradient material of strong magnetism and weak magnetism through flow casting molding in pulse magnetism
CN109320257B (en) Preparation method of high-strength high-porosity porous silicon nitride ceramic
Li et al. Effect of zirconia content and particle size on the properties of 3D‐printed alumina‐based ceramic cores
CN110252157A (en) A kind of reinforced metal composite ceramic film and preparation method thereof
CN104529442B (en) Non-pressure infiltration preparation process of functionally graded piezoelectric material (FGPM)
Rosenberger et al. Rheology and processing of UV‐curable textured alumina inks for additive manufacturing
US20230117192A1 (en) Preparation method for w-cu composite plate with cu phase in finger-shaped gradient distribution
CN111302785A (en) High-performance microwave dielectric ceramic and photocuring manufacturing method thereof
CN100412033C (en) Preparing process of great size energy-storing dielectric ceramic
Chen et al. Preparation of ZrO2 beads by an improved micro‐droplet spray forming process
CN115611631B (en) Silicon carbide composite powder and preparation method and application thereof
CN115806433B (en) Preparation method of laser 3D printing silicon carbide composite ceramic
WO2023085384A1 (en) Powder for producing ceramic structure
CN108097968A (en) A kind of method that powder tape casting prepares single-phase Fe-6.5%Si silicon steel

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant