CN106086500A - A kind of method preparing the continuous reinforced Al matrix composite of in-situ three-dimensional - Google Patents
A kind of method preparing the continuous reinforced Al matrix composite of in-situ three-dimensional Download PDFInfo
- Publication number
- CN106086500A CN106086500A CN201610624487.XA CN201610624487A CN106086500A CN 106086500 A CN106086500 A CN 106086500A CN 201610624487 A CN201610624487 A CN 201610624487A CN 106086500 A CN106086500 A CN 106086500A
- Authority
- CN
- China
- Prior art keywords
- dimensional
- powder
- situ
- matrix composite
- continuous reinforced
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
- C22C1/1047—Alloys containing non-metals starting from a melt by mixing and casting liquid metal matrix composites
- C22C1/1052—Alloys containing non-metals starting from a melt by mixing and casting liquid metal matrix composites by mixing and casting metal matrix composites with reaction
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0052—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only carbides
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Composite Materials (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a kind of method preparing the continuous reinforced Al matrix composite of in-situ three-dimensional, first by Ti powder, Al powder and graphite powder according to 2:(1～1.2): the mixed in molar ratio of 1, then grind and obtain mixed powder；Then mixed powder is put in mould and carry out colding pressing obtaining green compact；Joining in the Al melt that temperature is 700～900 DEG C after finally being preheated by green compact, base substrate is taken out cooling after terminating in melt by reaction, i.e. obtains the continuous reinforced Al matrix composite of in-situ three-dimensional.The present invention utilizes Al Ti C system thermal expousure, it is possible to quickly prepare the continuous reinforced Al matrix composite of in-situ three-dimensional.
Description
Technical field
The invention belongs to advanced metal-base composites preparation field, be specifically related to one and prepare in-situ three-dimensional and strengthen continuously
The method of Al based composites.
Background technology
Three-dimensional reinforced Al matrix composite continuously has another name called network and intersects Al based composites, its reinforcement and Al matrix three
Dimension space continuously and is mutually communicated in network mechanism.This composite configuration relatively conventional particles, fiber reinforcement Al based composites more have
Help give full play to reinforcement, substrate performance.Therefore, three-dimensional reinforced Al matrix composite continuously has high intensity, high rigidity, good
Good wear resistance and thermal shock resistance, higher thermal conductivity, relatively low thermal coefficient of expansion, at Aero-Space, automobile, electricity
The fields such as son, machine-building are with a wide range of applications.At present, three-dimensional reinforced Al matrix composite preparation method continuously is main
Infiltrating the method for forming for prefabricated component, it generally comprises porous and strengthens prefabricated component preparation and two steps of Al filling melt.Porous preforming
Part can pass through the preparations such as organic precursor infusion process, powder sintering, ablation, foam plastics grout coating process, sol-gel process,
But often there is the problems such as complicated process of preparation, prefabricated component intensity is relatively low in above method.On the other hand, during Al filling melt
Generally need to be by auxiliary processes such as infiltration, extruding, die casting, and Al matrix and reinforcement interface are easily generated defect (crackle, interface
Reaction etc.), and then affect composite serviceability.
Summary of the invention
It is an object of the invention to provide a kind of method preparing the continuous reinforced Al matrix composite of in-situ three-dimensional, to overcome
The defect that above-mentioned prior art exists, the present invention utilizes Al-Ti-C system thermal expousure in-situ endogenic three-dimensional in Al melt to connect
Continuous reinforcement, it is achieved the simple and quick preparation of the continuous reinforced Al matrix composite of in-situ three-dimensional.
For reaching above-mentioned purpose, the present invention adopts the following technical scheme that
A kind of method preparing the continuous reinforced Al matrix composite of in-situ three-dimensional, comprises the following steps:
Step 1: by Ti powder, Al powder and graphite powder according to 2:(1～1.2): the mixed in molar ratio of 1, then grind and mixed
Close powder；
Step 2: mixed powder is put into and carries out colding pressing in mould obtaining green compact；
Step 3: will join in the Al melt that temperature is 700～900 DEG C after green compact the pre-heat treatment, reacts base after terminating
Body takes out cooling in melt, i.e. obtains the continuous reinforced Al matrix composite of in-situ three-dimensional.
Further, in step 1, the purity of Ti powder, Al powder and graphite powder is all higher than 99%, granularity all≤100 μm.
Further, in step 1, milling time is 30～60min.
Further, in step 2 mould be internal diameter be 10mm cylindrical steel swage tool.
Further, when step 2 is colded pressing, the mixed powder in mould is applied the radial direction pressure of 50～150MPa
Power, obtains the cylinder green compact that thickness is 10～20mm.
Further, in step 3, temperature during green compact preheating is 700～900 DEG C, and the time is 1～3min.
Further, in step 3, the response time is 30～60s.
A kind of method preparing the continuous reinforced Al matrix composite of in-situ three-dimensional, comprises the following steps:
Step 1: by purity more than 99%, mean diameter be the Ti powder of 20 μm, purity more than 99%, mean diameter is 40 μm
Al powder and purity more than 99%, mean diameter is the graphite powder mixed in molar ratio according to 2:1:1 of 40 μm, then grinds at glass
Alms bowl is fully ground 30min, obtains mixed powder；
Step 2: put into by mixed powder in cylindrical steel swage that internal diameter is 10mm tool, by it in the radial direction pressure of 130MPa
The cylinder green compact that thickness is 15mm it are cold-pressed under power；
Step 3: green compact preheat at a temperature of 800 DEG C 2min, is then placed in the Al melt of 800 DEG C, after standing 45s
Take out cooling, i.e. obtain the continuous reinforced Al matrix composite of in-situ three-dimensional.
Compared with prior art, the present invention has a following useful technique effect:
The present invention utilizes Al-Ti-C base substrate thermal expousure in melt, it is possible under simple process, preparation is three-dimensional strengthens continuously
Al based composites.Three-dimensional reinforcement in-situ endogenic in melt continuously, eliminates porous preform and prepares link, and in porous
During precast body generates, in its aperture of the spontaneous entrance of Al melt, form reinforcement and be mutually communicated answering of network structure with matrix
Condensation material, and Al matrix and reinforcement interface be metallurgical binding, and three-dimensional REINFORCED Al base continuously prepared by traditional Infiltration Technics
Composite material interface mostly is mechanical bond, therefore in the inventive method, the composite material interface bond strength of preparation is higher.Additionally, it is logical
Cross change primary response powder diameter, ratio etc., the controlled design of in-situ three-dimensional reinforcement can be realized.
Further, select purity more than 99%, granularity all≤the Ti powder of 100 μm, Al powder and graphite powder can ensure that molten
Fully carrying out of internal thermal expousure.
Further, the mixed powder milling time of 30-60min is selected, it is ensured that the abundant mixing of powder.
Further, 50-150MPa radial pressure is selected, it is ensured that in preparation process, base substrate has sufficient intensity.
Further, select 700～900 DEG C of preheating temperature, the rapidly pre-warming of green compact can be realized.
Accompanying drawing explanation
Fig. 1 is the in-situ three-dimensional continuous reinforced Al matrix composite photomacrograph of preparation in embodiment 1；
Fig. 2 is the in-situ three-dimensional continuous reinforced Al matrix composite microstructure morphology figure of preparation in embodiment 1, wherein
A (), for amplifying 200 times of lower composite microstructure photos, (b) is for amplifying 3500 times of lower composite microstructure photos.
Detailed description of the invention
Below embodiments of the present invention are described in further detail:
A kind of method preparing the continuous reinforced Al matrix composite of in-situ three-dimensional, comprises the following steps:
Step 1: purity is all higher than 99%, granularity all≤the Ti powder of 100 μm, Al powder and graphite powder be according to 2:(1-1.2):
The mixed in molar ratio of 1, is then fully ground 30～60min (or using ball-milling technology) in glass mortar, obtains mixed powder；
Step 2: mixed powder is put in cylindrical steel swage that internal diameter is 10mm tool, by its 50～150MPa footpath
The cylinder green compact that thickness is 10～20mm it are cold-pressed under pressure；
Step 3: green compact preheat at a temperature of 700～900 DEG C 1～3min, the Al being then placed in 700～900 DEG C is molten
Internal, take out cooling after standing 30～60s, obtain the continuous reinforced Al matrix composite of in-situ three-dimensional.
It should be noted that matrix material can also select other Al alloy in addition to pure Al.
Below in conjunction with embodiment, the present invention is described in further detail:
Embodiment 1
Step 1: by Ti powder (purity is more than 99%, mean diameter 20 μm), (purity is more than 99% to Al powder, mean diameter 40 μ
M) with graphite powder (purity is more than 99%, mean diameter 40 μm) according to the mixed in molar ratio of 2:1:1, then fill in glass mortar
Divide and grind 30min, obtain mixed powder；
Step 2: put into by mixed powder in cylindrical steel swage that internal diameter is 10mm tool, by it in the radial direction pressure of 130MPa
The cylinder green compact that thickness is 15mm it are cold-pressed under power；
Step 3: green compact preheat at a temperature of 800 DEG C 2min, is then placed in the Al melt of 800 DEG C, after standing 45s
Take out cooling, thus obtain the continuous reinforced Al matrix composite of in-situ three-dimensional.
Fig. 1 is the in-situ three-dimensional continuous REINFORCED Al base composite wood that Al-Ti-C base substrate obtains after thermal expousure in Al melt
Material photo.Knowable to figure, the three-dimensional reinforcement of in-situ endogenic is continuous structure, and Al matrix is full of reinforcement aperture.Fig. 2 (a) is
The microstructure photo of composite.Knowable to figure, three-dimensional enhancing prepared by this technique is mutually comparatively dense, strengthens and mainly comprises
Lamellar ternary MAX phase (Ti2AlC/Ti3AlC2), graininess TiC, this is biphase is present in Al3In Ti phase, as shown in Fig. 2 (b).
Embodiment 2
Step 1: by Ti powder (purity is more than 99%, mean diameter 20 μm), (purity is more than 99% to Al powder, mean diameter 40 μ
And graphite powder (purity be more than 99%, mean diameter 40 μm) is according to the mixed in molar ratio of 2:1.1:1, then in glass mortar m)
It is fully ground 50min, obtains mixed powder；
Step 2: put into by mixed powder in cylindrical steel swage that internal diameter is 10mm tool, by it in the radial direction pressure of 50MPa
The cylinder green compact that thickness is 20mm it are cold-pressed under power；
Step 3: green compact preheat at a temperature of 850 DEG C 1.5min, is then placed in the Al melt of 850 DEG C, stands 45s
Rear taking-up cools down, thus obtains the continuous reinforced Al matrix composite of in-situ three-dimensional.
Embodiment 3
Step 1: by Ti powder (purity is more than 99%, mean diameter 20 μm), (purity is more than 99% to Al powder, mean diameter 40 μ
M) with graphite powder (purity is more than 99%, mean diameter 40 μm) according to the mixed in molar ratio of 2:1:1, then fill in glass mortar
Divide and grind 60min, obtain mixed powder；
Step 2: put into by mixed powder in cylindrical steel swage that internal diameter is 10mm tool, by it in the radial direction pressure of 100MPa
The cylinder green compact that thickness is 10mm it are cold-pressed under power；
Step 3: green compact preheat at a temperature of 700 DEG C 3min, is then placed in the Al melt of 700 DEG C, after standing 60s
Take out cooling, thus obtain the continuous reinforced Al matrix composite of in-situ three-dimensional.
Embodiment 4
Step 1: by Ti powder (purity is more than 99%, mean diameter 20 μm), (purity is more than 99% to Al powder, mean diameter 40 μ
And graphite powder (purity be more than 99%, mean diameter 40 μm) is according to the mixed in molar ratio of 2:1.2:1, then in glass mortar m)
It is fully ground 30min, obtains mixed powder；
Step 2: put into by mixed powder in cylindrical steel swage that internal diameter is 10mm tool, by it in the radial direction pressure of 150MPa
The cylinder green compact that thickness is 15mm it are cold-pressed under power；
Step 3: green compact preheat at a temperature of 900 DEG C 1min, is then placed in the Al melt of 900 DEG C, after standing 30s
Take out cooling, thus obtain the continuous reinforced Al matrix composite of in-situ three-dimensional.
Claims (8)
1. the method preparing the continuous reinforced Al matrix composite of in-situ three-dimensional, it is characterised in that comprise the following steps:
Step 1: by Ti powder, Al powder and graphite powder according to 2:(1～1.2): the mixed in molar ratio of 1, then grind and obtain mixed powder
Material；
Step 2: mixed powder is put into and carries out colding pressing in mould obtaining green compact；
Step 3: will join in the Al melt that temperature is 700～900 DEG C after green compact the pre-heat treatment, reaction terminate after by base substrate from
Take out cooling in melt, i.e. obtain the continuous reinforced Al matrix composite of in-situ three-dimensional.
A kind of method preparing the continuous reinforced Al matrix composite of in-situ three-dimensional the most according to claim 1, its feature exists
In, in step 1, the purity of Ti powder, Al powder and graphite powder is all higher than 99%, granularity all≤100 μm.
A kind of method preparing the continuous reinforced Al matrix composite of in-situ three-dimensional the most according to claim 1, its feature exists
In, in step 1, milling time is 30～60min.
A kind of method preparing the continuous reinforced Al matrix composite of in-situ three-dimensional the most according to claim 1, its feature exists
In, in step 2 mould be internal diameter be 10mm cylindrical steel swage tool.
A kind of method preparing the continuous reinforced Al matrix composite of in-situ three-dimensional the most according to claim 1, its feature exists
In, when step 2 is colded pressing, the mixed powder in mould is applied the radial pressure of 50～150MPa, obtaining thickness is 10
～the cylinder green compact of 20mm.
A kind of method preparing the continuous reinforced Al matrix composite of in-situ three-dimensional the most according to claim 1, its feature exists
In, in step 3, temperature during green compact preheating is 700～900 DEG C, and the time is 1～3min.
A kind of method preparing the continuous reinforced Al matrix composite of in-situ three-dimensional the most according to claim 1, its feature exists
In, in step 3, the response time is 30～60s.
8. the method preparing the continuous reinforced Al matrix composite of in-situ three-dimensional, it is characterised in that comprise the following steps:
Step 1: by purity more than 99%, mean diameter be the Ti powder of 20 μm, purity more than 99%, mean diameter is the Al of 40 μm
Powder and purity are more than 99%, and mean diameter is the graphite powder mixed in molar ratio according to 2:1:1 of 40 μm, then in glass mortar
It is fully ground 30min, obtains mixed powder；
Step 2: mixed powder is put in the cylindrical steel swage tool that internal diameter is 10mm, by it under the radial pressure of 130MPa
It is cold-pressed into the cylinder green compact that thickness is 15mm；
Step 3: green compact preheat at a temperature of 800 DEG C 2min, is then placed in the Al melt of 800 DEG C, takes out after standing 45s
Cooling, i.e. obtains the continuous reinforced Al matrix composite of in-situ three-dimensional.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610624487.XA CN106086500B (en) | 2016-08-02 | 2016-08-02 | A kind of method for preparing the continuous reinforced Al matrix composite of in-situ three-dimensional |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610624487.XA CN106086500B (en) | 2016-08-02 | 2016-08-02 | A kind of method for preparing the continuous reinforced Al matrix composite of in-situ three-dimensional |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106086500A true CN106086500A (en) | 2016-11-09 |
| CN106086500B CN106086500B (en) | 2018-01-19 |
Family
ID=57479863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610624487.XA Active CN106086500B (en) | 2016-08-02 | 2016-08-02 | A kind of method for preparing the continuous reinforced Al matrix composite of in-situ three-dimensional |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106086500B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110229969A (en) * | 2019-07-05 | 2019-09-13 | 西安交通大学 | A kind of the nano-TiC particle reinforced aluminum matrix composites and method of melting-reaction method preparation |
| CN110964951A (en) * | 2019-12-27 | 2020-04-07 | 成都航空职业技术学院 | Fe-C-Ti/ZL108 composite material and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1544678A (en) * | 2003-11-20 | 2004-11-10 | 上海交通大学 | In-situ synthesized TiC-AI composite ultra-fine grain refining agent and process for preparing same |
| CN1847423A (en) * | 2005-10-21 | 2006-10-18 | 兰州理工大学 | Prepn process of composite Al-Ti-C grain refining agent for aluminium and aluminium alloy |
| CN105200252A (en) * | 2014-06-24 | 2015-12-30 | 江苏朗亿新材料有限公司 | Novel high-conductivity and high-abrasion-resistance aluminum matrix composite |
-
2016
- 2016-08-02 CN CN201610624487.XA patent/CN106086500B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1544678A (en) * | 2003-11-20 | 2004-11-10 | 上海交通大学 | In-situ synthesized TiC-AI composite ultra-fine grain refining agent and process for preparing same |
| CN1847423A (en) * | 2005-10-21 | 2006-10-18 | 兰州理工大学 | Prepn process of composite Al-Ti-C grain refining agent for aluminium and aluminium alloy |
| CN105200252A (en) * | 2014-06-24 | 2015-12-30 | 江苏朗亿新材料有限公司 | Novel high-conductivity and high-abrasion-resistance aluminum matrix composite |
Non-Patent Citations (2)
| Title |
|---|
| 刘波波 等: "Ti2AlC三元可加工陶瓷原位反应合成的研究", 《特种铸造及有色合金》 * |
| 梅炳初 等: "原位热压TiC/Ti/Al合成Ti2AlC的研究", 《材料科学与工艺》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110229969A (en) * | 2019-07-05 | 2019-09-13 | 西安交通大学 | A kind of the nano-TiC particle reinforced aluminum matrix composites and method of melting-reaction method preparation |
| CN110229969B (en) * | 2019-07-05 | 2021-01-19 | 西安交通大学 | Nano TiC particle reinforced aluminum-based composite material prepared by melt reaction method and method |
| CN110964951A (en) * | 2019-12-27 | 2020-04-07 | 成都航空职业技术学院 | Fe-C-Ti/ZL108 composite material and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106086500B (en) | 2018-01-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104119095B (en) | A kind of sintering metal composite product and preparation method thereof | |
| CN103878346B (en) | A kind of preparation method of ceramic particle multi-scale enhancement metal matrix composite materials | |
| CN104209498B (en) | Preparing method of interface modification layer of ceramic particle enhanced metal base composite material | |
| CN101717900B (en) | Method for preparing silicon nitride reinforced aluminium-based composite material | |
| CN104073674A (en) | Preparation method of graphene aluminum-based composite material | |
| CN100464898C (en) | Process for making SiC particle reinforced composite material electronic package shell using semi-soild-state technology | |
| CN103343274A (en) | High-thermal-conductivity graphite-aluminium composite material reinforced by diamond particles in hybrid manner and preparation process for same | |
| CN104532045B (en) | A kind of preparation method of high volume fraction grain enhanced aluminum-base compound material | |
| CN102179502B (en) | Device and method for preparing metal matrix composite by adopting high-pressure gas to assist infiltration | |
| CN103343266A (en) | High-thermal-conductivity graphite-high silicon aluminium-based composite material and preparation process for same | |
| CN101157993A (en) | Method for preparing high volume-fraction carborundum granule-reinforced copper-based composite material | |
| CN102219518A (en) | Boron carbide-silicon carbide complex ceramic and preparation method thereof | |
| CN103981392A (en) | Preparation method of diamond/metal-based composite material with high volume fraction | |
| CN102626821A (en) | Method for connecting semi-solid materials into whole | |
| CN101423904A (en) | Method for manufacturing high volume fraction particulate reinforced metal-matrix composite pipes | |
| CN107353008A (en) | A kind of preparation method of laminated metal ceramic composite part | |
| CN105648259A (en) | Copper base-graphite positive gradient composite and preparation method thereof | |
| CN1297363C (en) | Method for producing high-volume fractional silicon-carbide particle reinforced aluminium-base composite material member | |
| CN101260488A (en) | Silicon nitride ceramic particles enhancement aluminum-base composite material and preparing method thereof | |
| CN102808100A (en) | Preparation method for directional hole ceramic enhanced metal matrix composite material | |
| CN103203448B (en) | Method for manufacturing metal matrix ceramic composite part | |
| CN101306464A (en) | Process for preparing high performance structural member with high SiC grain volume fraction | |
| CN106086500A (en) | A kind of method preparing the continuous reinforced Al matrix composite of in-situ three-dimensional | |
| CN100364071C (en) | Method of preparing electron packaging material using powder injection shaping/pressure fusion dipping method | |
| CN101845567B (en) | Method for strengthening diamond powder degreasing blank subjected to injection molding by infiltrating Cu |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221130 Address after: 712046 Floor 2, Building 7, Incubation Park, Gaoke Second Road, Xianyang Hi tech Industrial Development Zone, Shaanxi Province Patentee after: Xianyang Gazelle Valley New Material Technology Co.,Ltd. Address before: Beilin District Xianning West Road 710049, Shaanxi city of Xi'an province No. 28 Patentee before: XI'AN JIAOTONG University |