CN102260812A - Magnesium-based material with comprehensive rays and neutron shielding effect - Google Patents
Magnesium-based material with comprehensive rays and neutron shielding effect Download PDFInfo
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- CN102260812A CN102260812A CN2011101884434A CN201110188443A CN102260812A CN 102260812 A CN102260812 A CN 102260812A CN 2011101884434 A CN2011101884434 A CN 2011101884434A CN 201110188443 A CN201110188443 A CN 201110188443A CN 102260812 A CN102260812 A CN 102260812A
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Abstract
The invention belongs to a magnesium-based shielding material with comprehensive gamma rays and neutron shielding effect, in particular relates to a shielding material with light weight and multiple shielding effects. The shielding material comprises the following components by weight percent: 90%-99.7% of substrate and 0.3%-10% of boron or boride, wherein the substrate is magnesium-based alloy MgPbAl (20%-45% of Pb, 5%-20% of Al and the balance of Mg, based on weight percent); and boron or boride is a neutron absorber. Compared with the traditional magnesium-based material, Pb/B3C and lead boron polyethylene composite material, the magnesium-based shielding material containing boron or boride has a superior comprehensive x and gamma rays and neutron shielding effect, the tensile strength and Brinell Hardness (BH) of the magnesium-based shielding material are far higher than those of the existing Pb-B polyethylene and Pb-B4C composite shielding material.
Description
Technical field
The invention belongs to have X, the magnesium base shielding material of gamma-rays and the comprehensive shielded effect of neutron and preparation method thereof, the particularly shielding material of lightweight, multiple shield effectiveness and preparation method.
Background technology
Along with being on the rise of global greenhouse effect, more and more come into one's own as its application of nuclear energy of clean clean energy.Because nuclear reactor can discharge a large amount of heap human body harmfuls' ray and neutron radiation, should this need adopt shielding material that nuclear reactor is shielded, the exploitation that therefore has multiple ray and the comprehensive shielded material of neutron is the important topic in Nuclear safety field always.
The comprehensive shielded material of existing X, gamma-rays and neutron mainly contains lead-boron polythene, B
4C/Pb matrix material, leaded boron concrete and boronated stainless steel.In lead-boron polythene composite material, because polyethylene belongs to macromolecular material, softening temperature is 130 ℃, the mechanical strength and the poor heat resistance that cause lead-boron polythene composite material, its tensile strength is about 10MPa, and Brinell hardness only is 3～4, has seriously restricted its application; B
4The C/Pb matrix material is with Pb-X (X=Sb, Sn, Ag, Au, Cr etc.) alloy and B
4C strengthens body and is composited by powder metallurgy or fusion cast process method, can be used as intercept neutrons, block X, gamma-ray material, but intensity and plasticity are lower, its tensile strength is 48.2MPa, Brinell hardness is 22.13, cause it not use as structured material separately, and be difficult to prepare large-sized matrix material; Leaded boron weight concrete is big, and mobility is relatively poor, complicated component; Boronated stainless steel is more superior than iron to the shielding properties of gamma-rays and neutron, but because boron content is on the low side, the neutron assimilation effect is undesirable, have to increase the thickness of boronated stainless steel, cause the shielding harness gross weight to increase, and improve boron content the ductility and the impact resistance of boronated stainless steel alloy there is disadvantageous effect, limited the structured material of boronated stainless steel as spent fuel storage and transportation equipment, in addition, chromium in the stainless steel, nickel, elements such as manganese, be subjected to neutron irradiation postactivated, palpus restriction personnel are approaching after the reactor shutdown.
Although the comprehensive shielded material of various rays and neutron is arranged, all be unable to do without boron and plumbous two fundamental elements.Boron has the characteristic of superior shielding neutron.Plumbous the strongest to X, β, gamma-ray absorption and scattering, can mask once and the secondary gamma-rays, can not become radioactive source for the second time yet.The two combination is optimal nuclear radiation shield material.And magnesium alloy has following superiority: lightweight, rigidity are higher, absorption of vibrations good, the hertzian wave insulativity is good, thermal diffusivity is good, solidity to corrosion is good, texture is splendid, recyclable.Therefore, utilize magnesium can with the combining of alloying elements such as lead, aluminium, boron, develop the comprehensive shielded material of X, gamma-rays and neutron of characteristics such as having multiple shield effect, light weight, improve the mechanical property and the shielding properties of shielding material, being not only the important subject in Nuclear safety field, also is simultaneously to promote the important leverage that nuclear energy is used.
Summary of the invention
Technical problem to be solved by this invention provides a kind of mg-based material with ray and the comprehensive shielded effect of neutron and preparation method thereof, with magnesium as matrix, play tackiness agent, lead, boron are combined into matrix material in physical metallurgy bonded mode, and utilize aluminium to improve the solidity to corrosion of material.
Solving the technical scheme that technical problem of the present invention adopts is: shielding material is made up of MgPbAl Magnuminium and boron or boride.
Described shielding material is formed constituent mass per-cent, boron or boride 0.3%～10%, and all the other are Magnuminium.
The mass percent of each component is that Pb 20%～45%, Al 5%～20%, surplus are magnesium in the described MgPbAl Magnuminium.
The preparation technology of the mg-based material with ray and the comprehensive shielded effect of neutron that the present invention is above-mentioned is: prepare the MgPbAl Magnuminium earlier, add boron or boride at last, each constituent element is fully reacted, fine and closely woven to obtain to organize, in conjunction with good magnesium base shielding material with ray and the comprehensive shielded effect of neutron.In the preparation process, should guarantee that each constituent element fully reacts.
Because there are greatest differences in the physics and the chemical property of boron, plumbous two elements, boron-lead belongs to the immiscible alloy system, is difficult to boron or boride are uniformly distributed in the lead.At first, add boron or boride again, utilize the mutual capacitive of Mg, Al and boron or boride, realize homogenizing of plumbous, boron, obtain MgPbAl-boron or boride magnesium base ray/neutron shielding material lead and magnesium, the compound MgPbAl Magnuminium of preparing of aluminium.
The invention has the beneficial effects as follows: by the adding of element M g, Al and boron or boride, utilize the mutual capacitive of Mg, Al and boron or boride, when improving mechanical property, obtain MgPbAl-boron or boride magnesium base ray/neutron shielding material, its tensile strength and hardness number are much higher than Pb-B
4C matrix material and lead-boron polythene reach 295MPa and 146HBS respectively, and unit elongation is 10.21%.Has the comprehensive shielded effect of X, gamma-rays and neutron simultaneously, thickness is the MgPbAl-boron of 20mm or boride magnesium base ray/neutron shielding material to energy is that the X ray shielding rate of 65KeV, 118KeV and 250KeV reaches 97.95%, 99.19% and 89.48% respectively, has solved energy " the weak uptake zone of Pb " problem between 40～88KeV effectively; To gamma-ray shielding rate be 47.37% (
137The Cs source) and 31.97% (
60The Co source); The shielding rate of neutron is up to 90.18%; Have now under the low situation of shielding material at Pb and B content, the MgPbAl-boron of unit mass or boride magnesium base ray/neutron shield matrix material shield effectiveness are better than Pb/B
4C matrix material and boronated stainless steel, and suitable with lead-boron polythene.Function of shielding-mechanical structure of realizing MgPbAl-boron or boride magnesium base ray/neutron shielding material is integrated.When improving shielding properties, realize the simplification and the lightweight of shield facility.
Description of drawings
Fig. 1 is the microtexture sem photograph of MgPbAl-boron magnesium base ray/neutron shielding material of the present invention.
Fig. 2 is the microtexture sem photograph of MgPbAl-boride magnesium base ray/neutron shielding material of the present invention.
Embodiment
Embodiment 1: add mass percent and be 49% Mg, 44.1% Pb and 4.9% Al in smelting furnace, add 2.0% boron again.MgPbAl Magnuminium mass percent is 98% in the whole shielding material at this moment; B is 2%; Respectively forming constituent mass per-cent in the MgPbAl alloy is: Mg 50%, Pb 45%, Al 5%.Stir 2～5min, make each constituent element fully react generation.Casting is prepared into high strength MgPbAl-boron magnesium base ray/neutron shielding material.The test effect is as follows:
1. Microstructure characteristics: after specimen surface is handled (polishing → polishing → corrosion), the Microstructure characteristics of employing scanning electron microscope (model is XL30ESEM-TMP) observation analysis sample, as shown in Figure 1.Test shows: alloy structure is evenly distributed, and the interface bonding state of each phase is good.
2. tensile strength test: be prepared into the test sample rod and carry out the tensile strength test on the stretching mechanical trier, test result shows: the tensile strength of MgPbAl-boron magnesium base ray/neutron shielding material reaches 295MPa, is Pb/B
4C matrix material and lead-boron polythene 6～30 times see Table 1.Unit elongation is 7.35%.
3. Brinell hardness test: measure the Brinell hardness of shielding material on HB-3000 type Brinell tester, test result shows: the Brinell hardness of MgPbAl-boron magnesium base ray/neutron shielding material is 146, is Pb/B
4C matrix material and lead-boron polythene 6～35 times see Table 1.
4. shielding properties test: utilize MG452 type x-ray system to carry out the X ray shielding properties and detect, the X ray energy is respectively 65keV, 118keV and 250keV.Utilize gammairradiation amount standard set-up to carry out the test of gamma ray shielding performance, radioactive source is
137Cs (ray energy 661KeV) and
60Co (ray energy 1.25MeV).The neutron shield experiment adopts PTW-UNIDOS ionization chamber type standard dose instrument and Am-Be neutron source slowing down experimental installation to detect.Table 2 shows that MgPbAl-boron magnesium base ray/neutron shielding material is that the X ray shielding rate of 65KeV, 118KeV and 250KeV reaches 97.95%, 99.19% and 89.48% respectively to energy, has solved energy " the weak uptake zone of Pb " problem between 40～88KeV effectively; To gamma-ray shielding rate be 47.37% (
137The Cs source) and 31.97% (
60The Co source); The shielding rate of neutron reaches 90.18%.Table 3 explanation has now under the low situation of shielding material at Pb and B content, and the MgPbAl-boron magnesium base ray/neutron shielding material shield effectiveness of unit mass is better than pure lead and Pb/B
4The C matrix material, and suitable with lead-boron polythene.
Embodiment 2: add mass percent and be 54% Mg, 18% Pb and 18% Al in smelting furnace, add 10% boride again.MgPbAl Magnuminium mass percent is 90% in the whole shielding material at this moment; Boride is 10%; Respectively forming constituent mass per-cent in the MgPbAl alloy is: Mg 60%, Pb 20%, Al 20%.Stir 2～5min, make each constituent element fully react generation.Casting is prepared into high strength MgPbAl-boride magnesium base ray/neutron shielding material.The test effect is as follows:
1. Microstructure characteristics: after specimen surface is handled (polishing → polishing → corrosion), the Microstructure characteristics of employing scanning electron microscope (model is XL30ESEM-TMP) observation analysis sample, as shown in Figure 1.Test shows: alloy structure is evenly distributed, and the interface bonding state of each phase is good.
2. tensile strength test: be prepared into the test sample rod and carry out the tensile strength test on the stretching mechanical trier, test result shows: the tensile strength of MgPbAl-boride magnesium base ray/neutron shielding material reaches 282MPa, sees Table 1.Unit elongation is 10.21%.
3. Brinell hardness test: measure the Brinell hardness of shielding material on HB-3000 type Brinell tester, test result shows: the Brinell hardness of MgPbAl-boride magnesium base ray/neutron shielding material is 140, sees Table 1.
4. shielding properties test: utilize MG452 type x-ray system to carry out the X ray shielding properties and detect, the X ray energy is respectively 65keV, 118keV and 250keV.Utilize gammairradiation amount standard set-up to carry out the test of gamma ray shielding performance, radioactive source is
137Cs (ray energy 661KeV) and
60Co (ray energy 1.25MeV).The neutron shield experiment adopts PTW-UNIDOS ionization chamber type standard dose instrument and Am-Be neutron source slowing down experimental installation to detect.Table 2 shows that MgPbAl-boride magnesium base ray/neutron shielding material is that the X ray shielding rate of 65KeV, 118KeV and 250KeV reaches 77.92%, 79.18% and 68.45% respectively to energy; To gamma-ray shielding rate be 36.81% (
137The Cs source) and 21.51% (
60The Co source); The shielding rate of neutron reaches 96.78%.Table 3 explanation has under the low situation of shielding material the MgPbAl-boride magnesium base ray/neutron shielding material shield effectiveness excellence of unit mass now at Pb and B content.
Table 1 is the tensile strength and the Brinell hardness contrast table of shielding material of the present invention.
Table 1
| Title material | Tensile strength (MPa) | Brinell hardness | Unit elongation (%) |
| MgPbAl-boron shielding material | 295 | 146 | 7.35 |
| MgPbAl-boride shielding material | 282 | 143 | 10.21 |
| Pure Pb | 10～20 | 4～9 | - |
| The Pb-B polyethylene | 10 | 3～4 | - |
| Pb/B 4The C matrix material | 48.2 | 22.13 | - |
Table 2 is that thickness is the shielding properties table of the shielding material of the present invention of 20mm.
Table 2
Table 3 is the shielding material of the present invention of same thickness and pure lead, Pb/B
4C matrix material and lead-boron polythene shielding properties contrast table.
Table 3
Claims (3)
1. mg-based material with ray and the comprehensive shielded effect of neutron, it is characterized in that: it is characterized in that: shielding material is made up of MgPbAl Magnuminium and boron or boride.
2. by the described mg-based material with ray and the comprehensive shielded effect of neutron of claim 1, it is characterized in that: described shielding material is formed constituent mass per-cent and is, boron or boride 0.3%～10%, and all the other are Magnuminium.
3. by the described mg-based material with ray and the comprehensive shielded effect of neutron of claim 2, it is characterized in that: the mass percent of each component is that Pb 20%～45%, Al 5%～20%, surplus are magnesium in the described MgPbAl Magnuminium.
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| CN201110188443.4A CN102260812B (en) | 2011-07-06 | There is the mg-based material of ray and neutron comprehensive shielding effect |
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| CN201110188443.4A CN102260812B (en) | 2011-07-06 | There is the mg-based material of ray and neutron comprehensive shielding effect |
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| CN102260812B CN102260812B (en) | 2016-11-30 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104726731A (en) * | 2015-02-11 | 2015-06-24 | 太原理工大学 | Preparation method of enhanced magnesium alloy-based neutron absorption plate |
| WO2017063407A1 (en) * | 2015-10-15 | 2017-04-20 | 南京中硼联康医疗科技有限公司 | Neutron moderation material |
| US20170321306A1 (en) * | 2015-01-23 | 2017-11-09 | University Of Florida Research Foundation, Inc. | Radiation shielding and mitigating alloys, methods of manufacture thereof and articles comprising the same |
| CN114015136A (en) * | 2021-11-03 | 2022-02-08 | 王利军 | Production method of impact-resistant ultra-high molecular weight polyethylene buoy |
| US11491257B2 (en) | 2010-07-02 | 2022-11-08 | University Of Florida Research Foundation, Inc. | Bioresorbable metal alloy and implants |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1654711A (en) * | 2003-04-02 | 2005-08-17 | 赵全玺 | Metal member coated by anode sheath |
| CN101476057A (en) * | 2009-01-05 | 2009-07-08 | 昆明理工大学 | High strength lead alloy and manufacturing method thereof |
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1654711A (en) * | 2003-04-02 | 2005-08-17 | 赵全玺 | Metal member coated by anode sheath |
| CN101476057A (en) * | 2009-01-05 | 2009-07-08 | 昆明理工大学 | High strength lead alloy and manufacturing method thereof |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11491257B2 (en) | 2010-07-02 | 2022-11-08 | University Of Florida Research Foundation, Inc. | Bioresorbable metal alloy and implants |
| US20170321306A1 (en) * | 2015-01-23 | 2017-11-09 | University Of Florida Research Foundation, Inc. | Radiation shielding and mitigating alloys, methods of manufacture thereof and articles comprising the same |
| US10662508B2 (en) * | 2015-01-23 | 2020-05-26 | University Of Florida Research Foundation, Inc. | Radiation shielding and mitigating alloys, methods of manufacture thereof and articles comprising the same |
| US10995392B2 (en) | 2015-01-23 | 2021-05-04 | University Of Florida Research Foundation, Inc. | Radiation shielding and mitigating alloys, methods of manufacture thereof and articles comprising the same |
| CN104726731A (en) * | 2015-02-11 | 2015-06-24 | 太原理工大学 | Preparation method of enhanced magnesium alloy-based neutron absorption plate |
| WO2017063407A1 (en) * | 2015-10-15 | 2017-04-20 | 南京中硼联康医疗科技有限公司 | Neutron moderation material |
| US10157693B2 (en) | 2015-10-15 | 2018-12-18 | Neuboron Medtech Ltd. | Neutron moderation material |
| CN110507915A (en) * | 2015-10-15 | 2019-11-29 | 南京中硼联康医疗科技有限公司 | The slow material of neutron |
| CN110507915B (en) * | 2015-10-15 | 2021-03-09 | 南京中硼联康医疗科技有限公司 | Neutron retarding material |
| CN114015136A (en) * | 2021-11-03 | 2022-02-08 | 王利军 | Production method of impact-resistant ultra-high molecular weight polyethylene buoy |
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