CN103276254B - A kind of composite shielding material and preparation method thereof - Google Patents
A kind of composite shielding material and preparation method thereof Download PDFInfo
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- CN103276254B CN103276254B CN201310176166.4A CN201310176166A CN103276254B CN 103276254 B CN103276254 B CN 103276254B CN 201310176166 A CN201310176166 A CN 201310176166A CN 103276254 B CN103276254 B CN 103276254B
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Abstract
The invention discloses a kind of composite shielding material and preparation method thereof, object is to solve B at present
4when C/Al matrix material is used as shielding material, its B
4the content of C is higher, and the shield effectiveness for thermal neutron is the bigger the better, and B wherein
4when the content of C exceedes certain proportion, the mechanical property of material, plasticity-and workability are very poor, larger difficulty is brought to the preparation of this material, the problem of its application of extreme influence, it is the B of the material be made up of the raw material comprising following weight percent: 0.01%-5%, 0.1%-30% contains W material, the B of 3%-50%
4the aluminum or aluminum alloy of C, 40%-90%, other material of 0-8%.Composite shielding material of the present invention has excellent neutron/gamma-radiation shielding properties, the mechanical property of material and good processability, and densification degree is high, is specially adapted to neutron/gamma shielding field.
Description
Technical field
The present invention relates to Material Field, especially a kind of composite shielding material and preparation method thereof, is specially a kind of B
4c/Al composite shielding material and preparation method thereof, it can be used as the composite shielding material in the nuclear radiation places such as nuclear reactor, irradiated fuel assembly storage and radioactive substance storing.
Background technology
Along with the fast development of nuclear energy and various nuclear reactor, require more and more higher for the over-all properties for radiation proof neutron shielding material, the comprehensive shielded material that development has neutron and a gamma-radiation shielding is then the important topic in Nuclear safety field always.Usually, the material such as paraffin, polyethylene, polypropylene that hydrogen content is higher is excellent Moderation of the fast neutrons material; Containing the lithium fluoride of elemental lithium, lithiumbromide, lithium hydroxide and containing the boron oxide of boron, boric acid and norbide etc., it is excellent thermal neutron absorbing material; Meanwhile, the tungsten of 10cm thickness can reach 93% to the shielding rate of neutron, and it also has good shielding effect to fast neutron.Good material is shielded for lead, tungsten and other heavy metals etc. to gamma-radiation.These materials and matrix material thereof have been widely used in various nuclear reactor shielding harness, and play considerable effect.
Existing composite shielding material mainly comprises leaded boron concrete, boronated stainless steel, lead-boron polythene and B
4c/Al matrix material.Leaded boron concrete is the shielding material being widely used in fixed reactor, such material has that price is relatively cheap, material composition adjustability is large, shielding properties and structure properties advantage all preferably, but its intensity is relatively low, can only be used for fixed reactor or the unrestricted place of volume, its range of application is restricted.Boronated stainless steel has excellent physical and mechanical property, as high strength and good toughness, to neutron and gamma-ray shielding properties more superior than iron, but due to its Boron contents on the low side, the assimilation effect for neutron is undesirable.The comprehensive shielded effect of lead-boron polythene is better, but be take polymkeric substance as matrix due to this material, thus the use temperature of this material is only 80-100 DEG C, mechanical property is poor (being generally 10MPa-20MPa) also, can not meet the service requirements to the neutron shield field that thermotolerance and mechanical property have higher requirements.
B
4c/Al matrix material has the advantage of aluminium and norbide concurrently, and its density is low, and hardness is high, and thermal-neutron capture cross-section is high, cheap, good toughness, has good mechanical mechanics property and neutron absorption performance.Since the eighties in last century, it has been subject to the extensive attention of radio-protective researcher.By B
4when C/Al matrix material is used as shielding material, its B
4the content of C is higher, and the shield effectiveness for thermal neutron is the bigger the better, but works as B
4b in C/Al matrix material
4when the content of C exceedes certain proportion, the mechanical property of this material, plasticity-and workability are very poor, bring larger difficulty by its preparation, affect the widespread use of material greatly.
Summary of the invention
Goal of the invention of the present invention is: for by B
4when C/Al matrix material is used as shielding material, its B
4the content of C is higher, and the shield effectiveness for thermal neutron is the bigger the better, and B wherein
4when the content of C exceedes certain proportion, the mechanical property of material, plasticity-and workability are very poor, bring larger difficulty to the preparation of this material, and problem of its application of extreme influence, provides a kind of composite shielding material and preparation method thereof, be specially a kind of B
4c/Al composite shielding material and preparation method thereof.Composite shielding material of the present invention has excellent neutron/gamma-radiation shielding properties, the mechanical property of material and good processability, and densification degree is high, is specially adapted to neutron/gamma shielding field.
To achieve these goals, the present invention adopts following technical scheme:
A kind of composite shielding material, it be the B of the material be made up of the raw material comprising following weight percent: 0.01%-5%, 0.1%-30% containing W material, the B of 3%-50%
4the aluminum or aluminum alloy of C, 40%-90%, other material of 0-8%;
In described B
10the abundance of B is 19.0%-99.5%;
Described is one or more in W, tungsten compound containing W material.
As preferably, other material described is one or more in Ti, Si, Mg, Zr, V, Cr, rare earth element, titanium compound, silicon compound, magnesium compound, zirconium compounds, vanadium compound, chromium cpd, rare-earth compound.
As preferably, described titanium compound is TiB
2or TiO
2; Described silicon compound is SiO
2; Described magnesium compound is MgO; Described zirconium compounds is ZrO
2; Described vanadium compound is V
2o
5; Described chromium cpd is Cr
2o
3; Described rare-earth compound Y
2o
3or La
2o
3.
Described tungsten compound is WC or W
2o
5or WO
3or W
2b
5.
In described B
10the abundance of B is 19.6%-90.0%.
The preparation method of aforementioned composite shielding material, comprises the steps:
Step one, take raw material by proportioning;
Step 2, raw material step one taken, abrading-ball mix by the mass ratio of 1:2 ~ 10, obtain mixture, mixture is put into ball grinder, ball grinder is placed on ball mill again and carries out ball milling, Ball-milling Time 1-20h, is separated abrading-ball after ball milling, obtains slurry, slurry after drying, obtains mixed powder;
Step 3, mixed powder step 2 prepared load in soft mode, adopt cold isostatic compaction, base of must colding pressing;
Step 4, base of colding pressing carry out HIP sintering, remove, obtain composite shielding material after sintering in soft mode;
In described step 3, the pressure of cold isostatic compaction is 100-270MPa, time 5-60min;
In described step 4, base of colding pressing carries out HIP sintering, and hot isostatic pressing gas is rare gas element, and temperature is 400-670 DEG C, and pressure is 30-150MPa, and the time is 20-180min.
In described step 2, raw material step one taken, abrading-ball, ball-milling medium mix by the mass ratio of 1:2 ~ 10:0.2 ~ 2, obtain mixture, mixture is put into ball grinder, then ball grinder is placed on planetary ball mill and carries out wet ball grinding, Ball-milling Time 1-20h, after ball milling, abrading-ball is separated, obtain slurry, slurry after drying, obtains mixed powder.
In described step 4, rare gas element is argon gas.
Composite shielding material provided by the invention, with B
4c, aluminum or aluminum alloy, be main raw containing W material, by adding appropriate B, significantly improve the neutron shield performance of material, under the prerequisite ensureing composite shielding material neutron shield performance, reducing B
4c content, effectively improves mechanical property and the processing characteristics of material.Applicant is found by large quantity research, and B has certain solid solubility in Al and Alalloy.Therefore, applicant is at original B
4on the basis of C/Al matrix material, make it be solid-solution in aluminum or aluminum alloy by adding B, thus effectively improve the neutron shield performance of material, reduce B in matrix material
4the content of C.In the B that the present invention adopts
10the abundance of B is 19.0%-99.5%,
10the thermal neutron absorption cross section of B is 3837b, is concrete more than 50 times.Applicant, by the shielding properties of Theoretical Calculation material, optimizes composite material compositions, makes composite shielding material of the present invention under the prerequisite with excellent mechanical property, have excellent neutron and gamma-radiation shielding properties simultaneously.The present invention is at the original Al-B of guarantee
4under the prerequisite of C composite neutron shield performance, effectively optimize its mechanical property and processing characteristics, fully expand its application potential in nucleus screening field.
Because norbide and aluminium are wetting very difficult, need could be good under the high temperature of about 1200 DEG C wetting, and now, aluminium and norbide can generate more Al on interface
4c
3brittlement phase, reduces interface bond strength; And at high temperature, molten aluminium alloy easily volatilizees, and causes waste of raw materials, also there is certain harm to experimental installation, affect the work-ing life of equipment.Therefore, how effectively to reduce the temperature of reaction of matrix material, control inerface reaction, particularly controlling the generation of high-temperature brittleness phase, is another technological difficulties of the present invention.
The present invention also provides a kind of preparation method of composite shielding material, comprises the steps:
Step one, take raw material by proportioning;
Step 2, raw material step one taken, abrading-ball mix by the mass ratio of 1:2 ~ 10, obtain mixture, mixture is put into ball grinder, be placed in by ball grinder on ball mill and carry out ball milling, Ball-milling Time 1-20h, abrading-ball is stainless steel abrading-ball, after ball milling, abrading-ball is separated, obtain slurry, slurry after drying, obtains mixed powder;
Step 3, mixed powder step 2 prepared load in soft mode, adopt cold isostatic compaction, base of must colding pressing;
Step 4, base of colding pressing carry out HIP sintering, and hot isostatic pressing gas is rare gas element, and temperature is 400-670 DEG C, and pressure is 30-150MPa, and the time is 20-180min, removes, obtain composite shielding material after sintering in soft mode.
As preferably, in described step 2, raw material step one taken, abrading-ball, ball-milling medium mix by the mass ratio of 1:2 ~ 10:0.2 ~ 2, obtain mixture, mixture is put into ball grinder, then are placed in by ball grinder on planetary ball mill and carry out wet ball grinding.Slurry after ball milling after drying, obtains mixed powder, and slurry after ball milling before the drying, can precipitate, and namely slurry is after precipitation, drying, obtains mixed powder.As preferably, in step 4, the rare gas element adopted is argon gas.The material of mantle can be PVC; During ball milling, the rotating speed of ball grinder can be 100 ~ 300r/min, and Ball-milling Time is 1-20h; After ball milling, wire-mesh screen can be adopted to be separated by abrading-ball, preferably adopt 50-200 order wire-mesh screen, further, preferably adopt 100 order wire-mesh screens.
Adopt B prepared by above-mentioned technique
4c/ aluminium alloy compound shielding material is for neutron and gamma ray shielding excellent effect, and densification degree is high, mechanical property and good processability, is specially adapted to neutron/gamma shielding field.The present invention adopts hot isostatic pressing technique to prepare powder metallurgy B
4c/ aluminium alloy compound shielding material, effectively solves B
4c and Al is difficult to the problem soaked at low temperature, greatly reduce sintering temperature, reduces surface reaction speed, avoids the generation of harmful phase, and effective control composite material interface phase structure, optimizes the mechanical property of matrix material.
The present invention is for meeting nuclear radiation shield field, to the requirement of shielding material in comprehensive shielded performance, mechanical property, a kind of matrix material with good neutron/gamma-radiation shielding properties, mechanical property and processing characteristics is provided, and the preparation method of this material.More traditional composite shielding material is compared, and composite shielding material of the present invention all has good shielding properties to neutron and gamma-radiation, and composite materials property and processing characteristics are significantly improved.
Embodiment
All features disclosed in this specification sheets, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
Arbitrary feature disclosed in this specification sheets, unless specifically stated otherwise, all can be replaced by other equivalences or the alternative features with similar object.That is, unless specifically stated otherwise, each feature is an example in a series of equivalence or similar characteristics.
Embodiment 1
Take the raw material of following quality: the natural B of 0.1kg (
10the abundance of B is 19.8%), the WO of 15kg
3, 15kg B
4the Si of 6061 aluminium alloys of C, 65.9kg, Ti, 1kg of 3kg, raw material total mass is 100kg.Raw material, abrading-ball and ball-milling medium are pressed the mixing of 1:10:0.5 mass ratio, obtain mixture, mixture is put into ball grinder and carry out wet ball grinding, abrading-ball adopts stainless steel abrading-ball, ball-milling medium is dehydrated alcohol, and the rotating speed of ball grinder is 180r/min, and Ball-milling Time is 4h.Be separated by abrading-ball after ball milling, obtain slurry, slurry after drying, obtains mixed powder.
Loaded by mixed powder in soft mode, carry out cold isostatic compaction, isostatic cool pressing pressure is 180MPa, and temperature is 18 DEG C, and the time is 40min, base of must colding pressing.Base of colding pressing carries out HIP sintering after loading jacket sealing, and hot isostatic pressing gas is argon gas, and hip temperature is 580 DEG C, and hot isostatic pressing pressure is 100MPa, and hot isostatic pressing soaking time is 60min.After being removed in soft mode by material after hot isostatic pressing, namely prepare B
4c/Al composite shielding material.
Embodiment 2
Take the raw material of following quality: the B(of 1kg
10the abundance of B is 30%), the W of 5kg
2b
5, 50kg B
4the TiB of 7075 aluminium alloys of C, 41kg, Si, 1kg of 2kg
2, raw material total mass is 100kg.Raw material, abrading-ball and ball-milling medium are pressed the mixing of 1:5:0.2 mass ratio, obtain mixture, mixture is loaded in stainless steel jar mill and carry out wet ball grinding, abrading-ball adopts stainless steel abrading-ball, ball-milling medium is stearic acid, and the rotating speed of stainless steel jar mill is 150r/min, Ball-milling Time 8h.Mixed powder is obtained after ball milling.
Loaded by mixed powder in soft mode and carry out cold isostatic compaction, isostatic cool pressing pressure is 200MPa, and isostatic cool pressing temperature is 18 DEG C, and the isostatic cool pressing time is 10min, base of must colding pressing.Base of colding pressing carries out HIP sintering after loading jacket sealing, degasification, and hot isostatic pressing gas is argon gas, and hip temperature is 600 DEG C, and hot isostatic pressing pressure is 120MPa, and hot isostatic pressing soaking time is 20min.After being removed in soft mode by material after hot isostatic pressing, namely prepare B
4c/Al composite shielding material.
Embodiment 3
Take the raw material of following quality: the B(of 3kg
10the abundance of B is 90.0%), the B of W, 35kg of 10kg
4the Y of La, 1kg of Mg, 3kg of C, 44kg fine aluminium, 4kg
2o
3, raw material total mass is 100kg.Raw material, abrading-ball and ball-milling medium are pressed the mass ratio mixing of 1:4:1, obtain mixture, mixture is loaded in stainless steel jar mill and carry out wet ball grinding, abrading-ball adopts stainless steel abrading-ball, ball-milling medium is dehydrated alcohol, and the rotating speed of stainless steel jar mill is 100r/min, Ball-milling Time 20h.Be separated by abrading-ball after ball milling, obtain slurry, slurry, after precipitation, drying, obtains mixed powder.
Loaded by mixed powder in soft mode and carry out cold isostatic compaction, isostatic cool pressing pressure is 100MPa, and isostatic cool pressing temperature is 18 DEG C, and the isostatic cool pressing time is 60min, base of must colding pressing.Base of colding pressing carries out HIP sintering after loading jacket sealing, and hot isostatic pressing gas is argon gas, and hip temperature is 650 DEG C, and hot isostatic pressing pressure is 150MPa, and hot isostatic pressing soaking time is 30min.After being removed in soft mode by material after hot isostatic pressing, namely prepare B
4c/Al composite shielding material.
Embodiment 4
Take the raw material of following quality: the B(of 5kg
10the abundance of B is 50.0%), the B of W, 20kg of 10kg
4the TiO of Y, 0.5kg of 6063 aluminium alloys of C, 62 kg, Zr, 1kg of 1kg
2, 0.5kg Cr
2o
3, raw material total mass is 100kg.Raw material, abrading-ball and ball-milling medium are pressed the mass ratio mixing of 1:2:2, obtain mixture, loaded by mixture in ball grinder and carry out dry ball milling, abrading-ball adopts stainless steel abrading-ball, and the rotating speed of ball grinder is 250r/min, and Ball-milling Time is 2h.Mixed powder is obtained after ball milling.
Loaded by mixed powder in soft mode and carry out cold isostatic compaction, isostatic cool pressing pressure is 250MPa, and isostatic cool pressing temperature is 18 DEG C, and the isostatic cool pressing time is 20min, base of must colding pressing.Base of colding pressing carries out HIP sintering after loading jacket sealing, and hot isostatic pressing gas is argon gas, and hip temperature is 400 DEG C, and hot isostatic pressing pressure is 30MPa, and hot isostatic pressing soaking time is 180min.After being removed in soft mode by material after hot isostatic pressing, namely prepare B
4c/Al composite shielding material.
Embodiment 5
Take the raw material of following quality: the B(of 0.02kg
10the abundance of B is 70.0%), the B of WC, 10kg of 1kg
4the TiB of 2011 aluminium alloys of C, 86.48 kg, V, 1kg of 1kg
2, 0.5kg SiO
2, raw material total mass is 100kg.Raw material, abrading-ball and ball-milling medium are pressed the mass ratio mixing of 1:3:2, obtain mixture, loaded by mixture in ball grinder and carry out dry ball milling, abrading-ball adopts stainless steel abrading-ball, and the rotating speed of ball grinder is 220r/min, and Ball-milling Time is 4h.Mixed powder is obtained after ball milling.
Loaded by mixed powder in soft mode and carry out cold isostatic compaction, isostatic cool pressing pressure is 270MPa, and isostatic cool pressing temperature is 18 DEG C, and the isostatic cool pressing time is 6min, base of must colding pressing.Base of colding pressing carries out HIP sintering after loading jacket sealing, and hot isostatic pressing gas is argon gas, and hip temperature is 550 DEG C, and hot isostatic pressing pressure is 85MPa, and hot isostatic pressing soaking time is 100min.After being removed in soft mode by material after hot isostatic pressing, namely prepare B
4c/Al composite shielding material.
Embodiment 6
Take the raw material of following quality: the B(of 2.5kg
10the abundance of B is 62.0%), the W of 25kg
2o
5, 3kg B
4the ZrO of La, 0.5kg of 2014 aluminium alloys of C, 65 kg, Cr, 3kg of 1kg
2, raw material total mass is 100kg.Raw material, abrading-ball and ball-milling medium are pressed the mass ratio mixing of 1:4:0.5, obtain mixture, loaded by mixture in ball grinder and carry out dry ball milling, abrading-ball adopts stainless steel abrading-ball, and the rotating speed of ball grinder is 180r/min, and Ball-milling Time is 6h.Mixed powder is obtained after ball milling.
Loaded by mixed powder in soft mode and carry out cold isostatic compaction, isostatic cool pressing pressure is 240MPa, and isostatic cool pressing temperature is 18 DEG C, and the isostatic cool pressing time is 16min, base of must colding pressing.Base of colding pressing carries out HIP sintering after loading jacket sealing, and hot isostatic pressing gas is argon gas, and hip temperature is 500 DEG C, and hot isostatic pressing pressure is 60MPa, and hot isostatic pressing soaking time is 40min.After being removed in soft mode by material after hot isostatic pressing, namely prepare B
4c/Al composite shielding material.
Embodiment 7
Take the raw material of following quality: the W of the natural B of 2kg, W, 10kg of 20kg
2b
5, 5kg B
4the La of 5052 aluminium alloys of C, 57.5 kg, Ti, 3kg of 2kg
2o
3, 0.5kg MgO, raw material total mass is 100kg.Raw material, abrading-ball and ball-milling medium are pressed the mass ratio mixing of 1:4:0.3, obtain mixture, loaded by mixture in ball grinder and carry out dry ball milling, abrading-ball adopts stainless steel abrading-ball, and the rotating speed of ball grinder is 200r/min, and Ball-milling Time is 4h.Mixed powder is obtained after ball milling.
Loaded by mixed powder in soft mode and carry out cold isostatic compaction, isostatic cool pressing pressure is 270MPa, and isostatic cool pressing temperature is 18 DEG C, and the isostatic cool pressing time is 10min, base of must colding pressing.Base of colding pressing carries out HIP sintering after loading jacket sealing, and hot isostatic pressing gas is argon gas, and hip temperature is 620 DEG C, and hot isostatic pressing pressure is 100MPa, and hot isostatic pressing soaking time is 30min.After being removed in soft mode by material after hot isostatic pressing, namely prepare B
4c/Al composite shielding material.
Embodiment 8
Take the raw material of following quality: the natural B of 0.1kg, the WO of 15kg
3, 15kg B
46061 aluminium alloys of C, 66.9 kg, the Ti of 3kg, raw material total mass is 100kg.Raw material, abrading-ball and ball-milling medium are pressed the mass ratio mixing of 1:10:0.5, obtain mixture, loaded by mixture in stainless steel jar mill and carry out wet ball grinding, ball-milling medium is dehydrated alcohol, and the rotating speed of ball grinder is 220r/min, and Ball-milling Time is 3.5h.Be separated by abrading-ball after ball milling, obtain slurry, slurry after drying, obtains mixed powder.
Loaded by mixed powder in soft mode and carry out cold isostatic compaction, isostatic cool pressing pressure is 180MPa, and isostatic cool pressing temperature is 18 DEG C, and the isostatic cool pressing time is 10min, base of must colding pressing.Base of colding pressing carries out HIP sintering after loading jacket sealing, and hot isostatic pressing gas is argon gas, and hip temperature is 580 DEG C, and hot isostatic pressing pressure is 100MPa, and hot isostatic pressing soaking time is 1h.After being removed in soft mode by material after hot isostatic pressing, namely prepare B
4c/Al composite shielding material.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature of disclosing in this manual or any combination newly, and the step of the arbitrary new method disclosed or process or any combination newly.
Claims (7)
1., containing a B composite shielding material, it is characterized in that, it be the B of the material be made up of the raw material comprising following weight percent: 0.01%-5%, 0.1%-30% containing W material, the B of 3%-50%
4the aluminum or aluminum alloy of C, 40%-90%, other material of 0-8%;
In described B
10the abundance of B is 19.0%-99.5%;
Described is one or more in W, tungsten compound containing W material;
Other material described is one or more in Ti, Si, Mg, Zr, V, Cr, rare earth element, titanium compound, silicon compound, magnesium compound, zirconium compounds, vanadium compound, chromium cpd, rare-earth compound;
This material adopts the method comprised the steps to be prepared from:
Step one, take raw material by proportioning;
Step 2, raw material step one taken, abrading-ball mix by the mass ratio of 1:2 ~ 10, obtain mixture, mixture is put into ball grinder, ball grinder is placed on ball mill again and carries out ball milling, Ball-milling Time 1-20h, is separated abrading-ball after ball milling, obtains slurry, slurry after drying, obtains mixed powder;
Step 3, mixed powder step 2 prepared load in soft mode, adopt cold isostatic compaction, base of must colding pressing;
Step 4, base of colding pressing carry out HIP sintering, remove, obtain composite shielding material after sintering in soft mode;
In described step 3, the pressure of cold isostatic compaction is 100-270MPa, time 5-60min;
In described step 4, base of colding pressing carries out HIP sintering, and hot isostatic pressing gas is rare gas element, and temperature is 400-670 DEG C, and pressure is 30-150MPa, and the time is 20-180min.
2. according to claim 1 containing B composite shielding material, it is characterized in that, described titanium compound is TiB
2or TiO
2; Described silicon compound is SiO
2; Described magnesium compound is MgO; Described zirconium compounds is ZrO
2; Described vanadium compound is V
2o
5; Described chromium cpd is Cr
2o
3; Described rare-earth compound Y
2o
3or La
2o
3.
3. according to any one of claim 1-2 containing B composite shielding material, it is characterized in that, described tungsten compound is WC or W
2o
5or WO
3or W
2b
5.
4. according to any one of claim 1-2 containing B composite shielding material, it is characterized in that, in described B
10the abundance of B is 19.6%-90.0%.
5. according to any one of claim 1-4, contain the preparation method of B composite shielding material, it is characterized in that, comprise the steps:
Step one, take raw material by proportioning;
Step 2, raw material step one taken, abrading-ball mix by the mass ratio of 1:2 ~ 10, obtain mixture, mixture is put into ball grinder, ball grinder is placed on ball mill again and carries out ball milling, Ball-milling Time 1-20h, is separated abrading-ball after ball milling, obtains slurry, slurry after drying, obtains mixed powder;
Step 3, mixed powder step 2 prepared load in soft mode, adopt cold isostatic compaction, base of must colding pressing;
Step 4, base of colding pressing carry out HIP sintering, remove, obtain composite shielding material after sintering in soft mode;
In described step 3, the pressure of cold isostatic compaction is 100-270MPa, time 5-60min;
In described step 4, base of colding pressing carries out HIP sintering, and hot isostatic pressing gas is rare gas element, and temperature is 400-670 DEG C, and pressure is 30-150MPa, and the time is 20-180min.
6. according to claim 5 containing the preparation method of B composite shielding material, it is characterized in that, in described step 2, raw material step one taken, abrading-ball, ball-milling medium mix by the mass ratio of 1:2 ~ 10:0.2 ~ 2, obtain mixture, mixture is put into ball grinder, then ball grinder is placed on planetary ball mill and carries out wet ball grinding, Ball-milling Time 1-20h, after ball milling, abrading-ball is separated, obtain slurry, slurry after drying, obtains mixed powder.
7., according to claim 5 containing the preparation method of B composite shielding material, it is characterized in that, in described step 4, rare gas element is argon gas.
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| CN111968769B (en) * | 2020-09-10 | 2022-11-01 | 中国工程物理研究院核物理与化学研究所 | High-temperature-resistant fast neutron shielding material, composite shielding material and preparation method thereof |
| CN112522546B (en) * | 2020-10-26 | 2022-02-08 | 中北大学 | Preparation of B by using SLM technology4Method for C reinforced aluminium base composite material |
| CN113458394B (en) * | 2021-05-20 | 2023-04-07 | 中国工程物理研究院材料研究所 | Homogeneous boron carbide/aluminum composite material with high boron carbide content and preparation method thereof |
| CN114561569A (en) * | 2022-02-28 | 2022-05-31 | 东北大学 | Tungsten-titanium boride-based nuclear shielding composite material and preparation method thereof |
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| CN102268582A (en) * | 2011-07-06 | 2011-12-07 | 昆明理工大学 | Alumina-based material with comprehensive shielding effect of rays and neutrons |
| CN103045916A (en) * | 2012-12-26 | 2013-04-17 | 四川材料与工艺研究所 | Composite shielding material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102268582A (en) * | 2011-07-06 | 2011-12-07 | 昆明理工大学 | Alumina-based material with comprehensive shielding effect of rays and neutrons |
| CN103045916A (en) * | 2012-12-26 | 2013-04-17 | 四川材料与工艺研究所 | Composite shielding material and preparation method thereof |
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