CN106866152B - A kind of YB4The preparation method of block - Google Patents

A kind of YB4The preparation method of block Download PDF

Info

Publication number
CN106866152B
CN106866152B CN201710140285.2A CN201710140285A CN106866152B CN 106866152 B CN106866152 B CN 106866152B CN 201710140285 A CN201710140285 A CN 201710140285A CN 106866152 B CN106866152 B CN 106866152B
Authority
CN
China
Prior art keywords
powder
ball milling
ball
block
heating rate
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.)
Expired - Fee Related
Application number
CN201710140285.2A
Other languages
Chinese (zh)
Other versions
CN106866152A (en
Inventor
张久兴
李录录
张忻
刘洪亮
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.)
Beijing University of Technology
Original Assignee
Beijing University of Technology
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 Beijing University of Technology filed Critical Beijing University of Technology
Priority to CN201710140285.2A priority Critical patent/CN106866152B/en
Publication of CN106866152A publication Critical patent/CN106866152A/en
Application granted granted Critical
Publication of CN106866152B publication Critical patent/CN106866152B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
    • C04B35/5805—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on borides
    • 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
    • C04B35/6261—Milling
    • C04B35/62615—High energy or reactive ball milling
    • 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
    • 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
    • C04B35/645—Pressure 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
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
    • C04B2235/6562—Heating rate
    • 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
    • C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
    • C04B2235/6567—Treatment time
    • 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
    • C04B2235/666—Applying a current during sintering, e.g. plasma sintering [SPS], electrical resistance heating or pulse electric current sintering [PECS]
    • 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

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Powder Metallurgy (AREA)

Abstract

The present invention relates to a kind of YB4The preparation method of block.By YH2Powder and B powder are lower than in 0.5ppm argon atmosphere in oxygen content, 1:4 ball milling mixing is uniform in molar ratio, the good powder of middle ball milling is lower than in 0.5ppm ar gas environment in oxygen content and is put into graphite jig, then graphite jig is placed in SPS agglomerating plant and is sintered, sintering process are as follows: cavity is evacuated to 8Pa or less, 800-900 DEG C is risen under instrument initial pressure with the heating rate of 50-60 DEG C/min, heat preservation to chamber vacuum degree drops to 15Pa or less, apply the axial compressive force of 40-60MPa later, 1400-1600 DEG C is risen to again with 120-140 DEG C/min heating rate, keep the temperature 5-10min, decompression cools to room temperature with the furnace.The present invention is by YB4Material synthesis is combined into one that sintering temperature is low, the time is short, simple process with the preparation of block, and the material prepared is single-phase, with high purity, consistency is high, mechanical property is good.

Description

A kind of YB4The preparation method of block
Technical field
The invention belongs to high-temperature ceramic materials preparation technical fields, and in particular to YB4The preparation method of block, YB obtained4 Block can be applied to the fields such as high-temperature ceramic materials.
Background technique
YB4Fusing point is up to 2800 DEG C, oxide Y2O3Fusing point also be up to 2145 DEG C.And YB4Also have lower close Degree and lower elasticity modulus, therefore YB4It is a kind of up-and-coming superhigh temperature protective materials.YB at present4The preparation process of block Generally in two steps, the first step first uses the methods of boron heat, boron carbide reduction to prepare polycrystalline YB4Powder, then by powder through chemistry Method removal of impurities purification, washing, dry, broken, screening；Second step use again the method for hot pressed sintering high temperature (1800 DEG C~ 2100 DEG C) under the conditions of, (2~10h) sintering prepares YB for a long time4Block.The shortcomings that this method is that sintering temperature is higher, sintering Time is too long, and product is not fine and close enough, and reaction is incomplete, complex process, thus can seriously affect properties of product.
Summary of the invention
It is an object of the invention to solve problem of the prior art, provide a kind of high-purity, high-densit, excellent in mechanical performance YB4The efficient preparation method of block materials.Method sintering temperature provided by the present invention is low, the time is short, and simple process.
The present invention is using discharge plasma sintering (SPS) technology sintering boron (B) powder and hydrogenation yttrium (YH2) powder preparation YB4It is more Crystal block body material, the specific steps are as follows:
1) by YH2Powder and B powder are lower than in 0.5ppm argon atmosphere in oxygen content, and 1:4 ball milling mixing is uniform in molar ratio, Ball-milling technology: ball milling ball material mass ratio 10:1-15:1, revolving speed 300-500r/min, Ball-milling Time 2-5h；
2) the good powder of ball milling in step 1) is lower than in 0.5ppm ar gas environment in oxygen content and is put into graphite jig, so Graphite jig is placed in SPS agglomerating plant afterwards and is sintered, sintering process are as follows: cavity is evacuated to 8Pa hereinafter, initial in instrument Rise to 800-900 DEG C under pressure with the heating rate of 50-60 DEG C/min, heat preservation to chamber vacuum degree drop to 15Pa or less (because YH2H is generated by thermal decomposition2Cause chamber vacuum degree rise) after apply 40-60MPa axial compressive force, then with 120-140 DEG C/ Min heating rate rises to 1400-1600 DEG C, keeps the temperature 5-10min, and decompression cools to room temperature with the furnace, obtains YB4Block materials.
Wherein, YH described in step 1)2The partial size of powder is 360 mesh；The partial size of B powder is 200 mesh.
Compared with prior art, the invention has the following advantages:
1) two kinds of powder can be sufficiently mixed uniformly by ball milling in the method for the present invention, guarantee that reaction sufficiently carries out, while ball Mill can micronized particles, improve powder activity, reduce sintering temperature.The preparation of metal Y powder generally generates YH using suction hydrogen2Afterwards It is broken to obtain YH2Powder, then Dehydroepiandrosterone derivative obtains metal Y powder, and this method directlys adopt YH2Powder is raw material, reduces original Expect cost.
2) sintering temperature-rise period is divided into two stages, and the first stage is under instrument initial pressure with relatively low heating speed Degree heating, YH2The rate for decomposing generation hydrogen is lower, prevents the YH that is rapidly heated under high pressure2Fast decoupled generate a large amount of hydrogen without Method, which excludes mold, to be caused mould inner pressure to cross ambassador's graphite jig to burst, and the discharge for being conducive to hydrogen reduces bulk inner gas The quantity in hole, heat preservation to vacuum degree to 15Pa purpose below are to guarantee YH2What decomposition was decomposed after entirely preventing back to add high pressure Hydrogen, which is difficult to be discharged, to be caused；Second stage, which applies pressure raising heating rate, can shorten sintering time, improve block consistency.
3) present invention ensure that the purity of sample using elementsynthesis, and the preparation process of block is synthesis and the block of raw material The preparation process of body is combined into one, and simplifies technique, shortens the preparation time of sample, prepared YB4Block consistency is high, Relative density reaches as high as 98%, and Vickers hardness reaches as high as 2609Kg/mm2, it is single Y B through X-ray diffraction analysis4Object phase, X Ray fluorescence spectra detection chemical purity reaches 99.6%.
Detailed description of the invention
YB prepared by Fig. 1, embodiment 14It is sintered the X-ray spectrogram of block sample.
YB prepared by Fig. 2, embodiment 24It is sintered the X-ray spectrogram of block sample.
Below in conjunction with the drawings and specific embodiments, the invention will be further described, but protection scope of the present invention is unlimited In following embodiments.
Specific embodiment
Embodiment 1
1) by YH2Powder and B powder are lower than in 0.5ppm argon atmosphere in oxygen content, and 1:4 ball milling mixing is uniform in molar ratio, Ball-milling technology: ball milling ball material mass ratio 10:1, revolving speed 300r/min, Ball-milling Time 2h；
2) the good powder of ball milling in step 1) is lower than in 0.5ppm ar gas environment in oxygen content and is put into graphite jig, so Graphite jig is placed in SPS agglomerating plant afterwards and is sintered, sintering process are as follows: cavity is evacuated to 8Pa hereinafter, initial in instrument 800 DEG C are risen to the heating rate of 50 DEG C/min under pressure, heat preservation drops to 15Pa hereinafter, applying later to chamber vacuum degree The axial compressive force of 40MPa, then 1400 DEG C are risen to 120 DEG C/min heating rate, 5min is kept the temperature, decompression cools to room temperature with the furnace, Obtain YB4Block materials.
XRD spectra is as shown in Figure 1, as seen from the figure, sample YB4Single-phase, crystallinity is high.X-ray fluorescence spectra detectionization It learns purity and reaches 99.7%, the relative density for measuring sample is 96.2%, and Vickers hardness reaches 2302Kg/mm2。
Embodiment 2
1) by YH2Powder and B powder are lower than in 0.5ppm argon atmosphere in oxygen content, and 1:4 ball milling mixing is uniform in molar ratio, Ball-milling technology: ball milling ball material mass ratio 10:1, revolving speed 400r/min, Ball-milling Time 3h；
2) the good powder of ball milling in step 1) is lower than in 0.5ppm ar gas environment in oxygen content and is put into graphite jig, so Graphite jig is placed in SPS agglomerating plant afterwards and is sintered, sintering process are as follows: cavity is evacuated to 8Pa hereinafter, initial in instrument 900 DEG C are risen to the heating rate of 60 DEG C/min under pressure, heat preservation drops to 15Pa hereinafter, applying later to chamber vacuum degree The axial compressive force of 50MPa, then 1500 DEG C are risen to 140 DEG C/min heating rate, 5min is kept the temperature, decompression cools to room temperature with the furnace, Obtain YB4Block materials.
XRD spectra is as shown in Fig. 2, as seen from the figure, sample YB4Single-phase, crystallinity is high.X-ray fluorescence spectra detectionization It learns purity and reaches 99.8%, the relative density for measuring sample is 97.2%, and Vickers hardness reaches 2439Kg/mm2。
Embodiment 3
1) by YH2Powder and B powder are lower than in 0.5ppm argon atmosphere in oxygen content, and 1:4 ball milling mixing is uniform in molar ratio, Ball-milling technology: ball milling ball material mass ratio 15:1, revolving speed 500r/min, Ball-milling Time 5h；
2) the good powder of ball milling in step 1) is lower than in 0.5ppm ar gas environment in oxygen content and is put into graphite jig, so Graphite jig is placed in SPS agglomerating plant afterwards and is sintered, sintering process are as follows: cavity is evacuated to 8Pa hereinafter, initial in instrument 900 DEG C are risen to the heating rate of 60 DEG C/min under pressure, heat preservation drops to 15Pa hereinafter, applying later to chamber vacuum degree The axial compressive force of 60MPa, then 1600 DEG C are risen to 140 DEG C/min heating rate, 10min is kept the temperature, decompression cools to room with the furnace Temperature obtains YB4Block materials.
X-ray fluorescence spectra detection chemical purity reaches 99.6%, and the relative density for measuring sample is 98.6%, and Vickers is hard Degree reaches 2609Kg/mm2。

Claims (1)

1. a kind of YB4The preparation method of block materials, it is characterised in that the following steps are included:
1) by YH2Powder and B powder are lower than in 0.5ppm argon atmosphere in oxygen content, and 1:4 ball milling mixing is uniform in molar ratio, ball milling In technique: ball milling ball material mass ratio 10:1-15:1, revolving speed 300-500r/min, Ball-milling Time 2-5h；
2) the good powder of ball milling in step 1) is lower than in 0.5ppm ar gas environment in oxygen content and is put into graphite jig, then will Graphite jig is placed in discharging plasma sintering equipment and is sintered, sintering process are as follows: cavity is evacuated to 8Pa hereinafter, in instrument Rise to 800-900 DEG C under initial pressure with the heating rate of 50-60 DEG C/min, heat preservation to chamber vacuum degree drop to 15Pa with Under, apply the axial compressive force of 40-60MPa later, then rise to 1400-1600 DEG C with 120-140 DEG C/min heating rate, keeps the temperature 5- 10min, decompression cool to room temperature with the furnace, obtain YB4Block materials.
CN201710140285.2A 2017-03-10 2017-03-10 A kind of YB4The preparation method of block Expired - Fee Related CN106866152B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710140285.2A CN106866152B (en) 2017-03-10 2017-03-10 A kind of YB4The preparation method of block

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710140285.2A CN106866152B (en) 2017-03-10 2017-03-10 A kind of YB4The preparation method of block

Publications (2)

Publication Number Publication Date
CN106866152A CN106866152A (en) 2017-06-20
CN106866152B true CN106866152B (en) 2019-09-03

Family

ID=59169978

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710140285.2A Expired - Fee Related CN106866152B (en) 2017-03-10 2017-03-10 A kind of YB4The preparation method of block

Country Status (1)

Country Link
CN (1) CN106866152B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108441954A (en) * 2018-04-17 2018-08-24 合肥工业大学 A kind of preparation method of high-purity large scale GdB4 monocrystalline topology semi-metallics
CN111793823B (en) * 2020-07-16 2022-02-18 合肥工业大学 High-purity gadolinium hexaboride polycrystal and preparation method thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102259882A (en) * 2011-06-21 2011-11-30 武汉理工大学 Preparation method of high-purity YB4 powder body
CN104876623A (en) * 2015-05-20 2015-09-02 航天材料及工艺研究所 High-strength high-porosity YB4 superhigh temperature porous ceramic and preparation method thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102259882A (en) * 2011-06-21 2011-11-30 武汉理工大学 Preparation method of high-purity YB4 powder body
CN104876623A (en) * 2015-05-20 2015-09-02 航天材料及工艺研究所 High-strength high-porosity YB4 superhigh temperature porous ceramic and preparation method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Synthesis of Pure YB4 Powder via the Reaction of Y2O3 with B4C;Junguo Li等;《Journal of The American Ceramic Society》;20121231;第95卷(第7期);第2127–2129页

Also Published As

Publication number Publication date
CN106866152A (en) 2017-06-20

Similar Documents

Publication Publication Date Title
CN106048374B (en) A kind of infusibility high-entropy alloy/carbonization titanium composite material and preparation method thereof
CN103695685B (en) A kind of microwave sintering reaction prepares the method for WC-Co hard alloy
CN104313380B (en) A kind of step sintering prepares the method for high-compactness Nanograin Cemented Carbide
CN101381085B (en) Rapid preparation method of LaB6 polycrystalline bulk cathode material
CN110407213B (en) (Ta, nb, ti, V) C high-entropy carbide nano powder and preparation method thereof
CN103924111B (en) The preparation method of a kind of Wimet nanometer particle size powder and high performance sintered block materials
CN104894641B (en) It is a kind of high fine and close（LaxCa1‑x）B6Polycrystalline cathode material and preparation method thereof
CN113185295A (en) Method for preparing MAX-phase high-entropy ceramic material
CN107512912A (en) The preparation method of high-purity MoAlB ceramic powders and compact block
CN107285771B (en) Preparation method of ternary rare earth diboron-carbon ceramic material
CN109796209A (en) One kind (Ti, Zr, Hf, Ta, Nb) B2High entropy ceramic powder and preparation method thereof
Feng et al. Nano-TaC powder synthesized using modified spark plasma sintering apparatus and its densification
CN106987752B (en) A kind of gradient hard alloy preparation method of case-carbonizing
CN110204338A (en) A kind of high-purity alpha-SiC ceramics of normal pressure solid-phase sintering and preparation method thereof
CN110484796A (en) A kind of high entropy ceramic particle of transition metal carbide and preparation method thereof
CN114525424B (en) Titanium-based composite material and preparation method thereof
CN106866152B (en) A kind of YB4The preparation method of block
CN107555998A (en) High-purity Fe2AlB2The preparation method of ceramic powder and compact block
CN110204341A (en) One kind (Hf, Ta, Nb, Ti) B2High entropy ceramic powder and preparation method thereof
CN104150908A (en) Titanium-molybdenum carbide ceramic powder and preparation method thereof
Yang et al. COMPARISON OF SPARK PLASMA SINTERING OF ELEMENTAL AND MASTER ALLOY POWDER MIXES AND PREALLOYED Ti-6AI-4V POWDER.
Zhang et al. Multi-stage spark plasma sintering to study the densification mechanisms of boron carbide
CN111116206A (en) Preparation method of compact MoAlB ceramic material, product thereof and preparation method of high-purity MoAlB ceramic powder
CN106032323A (en) Method for preparing Ti2AlC ceramic powder from TiAl powder
Sun et al. Synthesis mechanism and sintering behavior of tungsten carbide powder produced by a novel solid state reaction of W2N

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
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20190903