1. Kemikari Make-up uye Mamiriro Emaitiro eBoron Carbide Powder
1.1 B ₄ C Stoichiometry uye Atomic Style
(Boron Carbide)
Boron carbide (B ZVINA C) hupfu isimbi isiri-oxide ceramic zvinhu inoumbwa zvakanyanya ne boron uye kabhoni maatomu, ine yakakwana stoichiometric formula B ₄ C, kunyangwe ichiratidza huwandu hukuru hwekuumbwa kwekupokana kubva paB ₄ C kusvika B ₁₀. shanu C.
Chimiro chayo chekristaro chinobva kune rhombohedral system, inoratidzwa netiweki ye12-atomu icosahedra– imwe neimwe ine 11 boron maatomu uye 1 carbon atomu– yakabatanidzwa naDirect B– C kana C– B– C zvakananga triatomic cheni pamwe chete [111] mirayiridzo.
Iyi yakakosha kurongeka kwecosahedra yakasungwa nekubatana uye cheni dzekubatanidza dzinoburitsa kusimba kunoshamisa uye kugadzikana kwekupisa., kugadzira boron carbide imwe yezvakaoma zvinozivikanwa zvigadzirwa, yakapfuura nekungoita cubic boron nitride nedhaimani.
Kuvapo kwekukanganisa kwekuvaka, senge kushomeka kwekabhoni mucheni yakananga kana substitutional kusagadzikana mukati meiyo icosahedra, zvinoshamisa zvinokanganisa michina, zvemagetsi, uye neutron absorption yekugara zvivakwa, inoda kunyatso kudzora panguva yeupfu synthesis.
Aya maatomu-level maficha anowedzerawo kune yakaderedzwa ukobvu (~ 2.52 g/cm MATATU), iyo yakakosha kune lightweight shield application uko kusimba-kune-huremu chikamu chakakosha.
1.2 Phase Kuchena uye Kusvibisa Impacts
Kushandiswa kwepamusoro-soro kunoda boron carbide powders ine high phase kuchena uye kusvibiswa kuduku kubva kuokisijeni, simbi inosvibisa, kana nhanho dzechipiri dzakadai se boron suboxides (B ₂ O VAVIRI) kana kabhoni isingadhuri.
Kusvibiswa kweokisijeni, kazhinji inounzwa panguva yekugadzirisa kana kubva kune zvakakosha zvinhu, inogona kuita B TWO O ₃ pamiganhu yezviyo, iyo inoputika pakupisa uye inovandudza porosity mukati mekupisa, zvakakomba kuputsa kutendeseka kwemichina.
Kusvibiswa kwesimbi senge simbi kana silicon kunogona kuita sekubatsira kwekupisa asi kunogonawo kugadzira eutectics yakaderera-inonyunguduka kana nhanho dzechipiri dzinokanganisa kuoma uye kugadzikana kwekupisa..
Nokuda kwechikonzero ichocho, nzira dzekuchenesa dzakadai se acid leaching, kudziya kwepamusoro-soro pasi peinert ambiences, kana kushandiswa kwe-ultra-pure precursors kwakakosha kugadzira poda yakakodzera kune innovative ceramics.
Iyo diki dimension yekugovera uye ruzivo nharaunda yehupfu zvakare inoita basa rakakosha mukuona sinterability uye yekupedzisira microstructure., ne submicron powders kazhinji zvichiita kuti zvikwanise kukwirisa densification pakudzikira tembiricha.
2. Synthesis uye Kubata Boron Carbide Powder
(Boron Carbide)
2.1 Maindasitiri neLabhoritari-Scale Kugadzira Nzira
Boron carbide poda inonyanya kugadzirwa nepamusoro-tembiricha carbothermal kuderera kweboron-ine inotungamira., vazhinji kazhinji boric acid (H VASHANU BO VAVIRI) kana boron oxide (B ₂ O MATANHU), kushandisa kabhoni zviwanikwa zvakaita seoiri coke kana marasha.
The reaction, inowanzoitwa mumagetsi arc heaters patembiricha iri pakati 1800 °C uye 2500 °C, anoenderera mberi achiti: 2B ZVIVIRI ZVINA + 7C → B INA C + 6CO.
Iyi nzira inobereka yakaoma, hupfu husina kuumbwa hunodaidzira kugaya kwakazara uye chikamu kuti zvizadzise zvidimbu zvakakura zvinodiwa pakugadzirwa kweceramic..
Dzimwe nzira dzakadai selaser-induced chemical vapor deposition (CVD), plasma-yakabatsirwa synthesis, uye mechanochemical kubata dhiri makosi kuti aite zvakanaka, yakawanda homogeneous poda ine kutonga kuri nani pamusoro pe stoichiometry uye morphology.
Mechanochemical synthesis, semuyenzaniso, inosanganisira yakakwirira-simba rakatenderedza kugaya yakakosha boron uye kabhoni, kuita kuti zvikwanisike mukamuri-tembiricha kana kudzika-tembiricha kuvandudzwa kweB ₄ C kuburikidza nemhinduro dzakasimba-dzinotungamirwa nemagetsi emagetsi..
Aya maitiro akaomarara, nepo zvakanyanya kudhura, vari kuwana kufarira kwekugadzira nanostructured poda ine boosted sinterability uye inoshanda inoshanda.
2.2 Powder Morphology uye Surface Dhizaini
Iyo morphology ye boron carbide poda– kana angular, round, kana nanostructured– yakatwasuka inokanganisa kuyerera kwayo, kurongedza density, uye reactivity mukati mekubatanidzwa kwechikwereti.
Angular bits, zvakajairwa zvekupwanywa nemuchina wakagadzirwa poda, kuita kupindirana, kuwedzera simba rakasvibira asi zvichigona kupa materu akakora.
Round powders, kazhinji inogadzirwa kuburikidza nekupfapfaidza kuomesa kunze kana plasma spheroidization, inopa yepamusoro yekutenderera maitiro ekuwedzera ekugadzira uye inopisa kusundira maapplication.
Kugadziriswa kwepamusoro, kusanganisira kuvhara nekabhoni kana polymer dispersants, inogona kuwedzera kupararira kwehupfu mumaslurries uye kudzivirira sumbu, izvo zvakakosha pakuwana yunifomu microstructures mune sintered zvinhu.
Uyezve, pre-sintering marapirwo senge annealing mune inert kana kudzikira nharaunda anobatsira kubvisa pamusoro oxides uye adsorbed marudzi., kuvandudza sinterability uye kuvhurika kwekupedzisira kana simba remagetsi.
3. Dzimba Dzinoshanda uye Kuita Metrics
3.1 Mechanical uye Thermal Habits
Boron carbide powder, kana yakabatanidzwa mumisara ceramics, inoratidza dzimba dzemagetsi dzepamusoro, kusanganisira Vickers kuoma kwe30– 35 GPa, zvichiita kuti ive imwe yezvakaoma dhizaini zvigadzirwa zviripo.
Simba rayo rekumanikidza rinopfuura 4 GPa, uye inochengetedza kutendeseka kwechimiro pamatanho ekupisa zvakanyanya 1500 ° C munzvimbo inert, kunyangwe oxidation inosvika pakuve yakakosha pamusoro 500 ° C mumhepo nekuda kweB ₂ O maitiro matanhatu.
Chigadzirwa chakaderera ukobvu (~ 2.5 g/cm MATANHU) inopa simba rakatanhamara-kune-huremu chikamu, bhenefiti yakakosha muaerospace uye ballistic kuchengetedza masisitimu.
Zvakadaro, boron carbide yakasikwa brittle uye iri panjodzi ye amorphization pasi pepamusoro-kushushikana mhedzisiro, kunzwa kunozivikanwa se “kurasikirwa kweshear kuoma,” iyo inodzikamisa kushanda kwayo mune chaiyo nhovo mamiriro anosanganisira yakakwirira-velocity projectiles.
Tsvagiridzo yekudzidza mukati mekugadzirwa kwemubatanidzwa– sekubatanidza B FOUR C nesilicon carbide (SiC) kana carbon fibers– inovavarira kudzikisira ichi chinomanikidza nekuvandudza simba rekutsemuka uye kupera simba.
3.2 Neutron Absorption uye Nuclear Applications
Chimwe chezvinhu zvinonyanya kukosha zveboron carbide ndeyekupisa kwayo neutron absorption cross-section., kunyanya semhedzisiro ye ¹⁰ B isotope, iyo inoita ¹⁰ B(n, a)⁷ Li nyukireya kuita pakubata neutron.
Ichi chivakwa chinoita B FOUR C poda ive chaiyo chigadzirwa chekuchengetedza neutron, kudzora tsvimbo, uye kuvhara pellets mumagetsi eatomu, uko inonyatsotora manyuturoni akawandisa kugadzirisa mhinduro dzefission.
Izvo zvinokonzerwa nealpha particles uye lithium ions ipfupi-renji, zvigadzirwa zvisiri-gasi, kuderera kwekukuvara kwechimiro uye gasi kuvaka mukati me activator zvinhu.
Kuvandudza iyo ¹⁰ B isotopu inovandudza neutron absorption zvirinani., kubvumira mutete, yakawedzera inoshanda kuchengetedza zvigadzirwa.
Pamusoro pe, boron carbide's chemical chengetedzo uye nemwaranzi kuramba kunoita mamwe anogara kwenguva refu kushanda munzvimbo dzakakwirira-mwaranzi.
4. Zvishandiso muAdvanced Manufacturing uye Technology
4.1 Ballistic Dziviriro uye Wear-Resistant Zvikamu
Iko kushandiswa kwakakosha kweboron carbide poda inoramba iri mukugadzirwa kwehuremu hweceramic nhumbi dzokurwa dzevashandi, marori, uye ndege.
Kana yakanyudzwa mumataira epasi uye kuiswa mukati chaimo mumubatanidzwa masisitimu ezvombo ane polymer kana simbi zvinotsigira., B ZVINA C zvinonyatso bvisa iyo kinetic simba repamusoro-velocity projectiles nekutsemuka., kuputika kwepurasitiki yepini, uye hurongwa hwekunyudza simba.
Iyo yakaderera density inobvumira yakareruka nhovo masisitimu akasiyana kune dzimwe nzira senge tungsten carbide kana simbi., zvakakosha pakufamba kwemauto uye kuita gasi.
Kare kudzivirira, boron carbide inoshandiswa mukupfeka-resistant zvinhu senge nozzles, zvisimbiso, uye kuderedza midziyo, uko kusimba kwayo kwakanyanya kunovimbisa hupenyu hurefu munzvimbo dzakaoma.
4.2 Additive Production uye Arising Technologies
Ikozvino kufambira mberi mukuwedzera kwekugadzira (AM), kunyanya binder jetting uye laser poda mubhedha musanganiswa, vakanyatsovhura mikana mitsva yekugadzira yakaoma-yakaita boron carbide zvikamu.
High-kuchena, spherical B FOUR C poda yakakosha pakuita izvi, inoda kuyerera kwakatanhamara uye kurongedza density kuti iite imwe layer inowirirana uye kugadzikana kwechikamu.
Nepo matambudziko anoramba aripo– senge yakakwira melting point, thermal tension fracturing, uye porosity inodzokororwa– kudzidza kuri kufambira mberi kune gobvu chose, net-shape ceramic zvikamu zveaerospace, nuclear, uye kushandiswa kwesimba.
Uyezve, boron carbide iri kuwanikwa mune thermoelectric gadget, slurries isingafadzi yekunyatso polishing, uye sechikamu chekusimbisa musimbi matrix compounds.
Muchidimbu, boron carbide poda inomira padanho rinotungamira rezvigadzirwa zveceramic zvigadzirwa, kubatanidza kuoma kwakanyanya, kuderedzwa ukobvu, uye neutron absorption kugona mune yega inorganic system.
Kuburikidza nekudzora kwakananga kwekugadzira, morphology, uye kubata, inoita kuti zvikwanisike kune matekinoroji emazuva ano ari kushanda mune imwe yenzvimbo dzinonyanya kudiwa, kubva kunhandare yehondo kusvika kune nuclear reactor cores.
Sezvo synthesis uye nzira dzekugadzira dzichiramba dzichikura, boron carbide powder zvirokwazvo icharamba iri yakakosha inogonesa yechizvarwa chinotevera chepamusoro-kuita zvinhu.
5. Provider
RBOSCHCO mutengesi akavimbika wepasi rose wemakemikari zvinhu & mugadziri ane pamusoro 12 makore ruzivo mukupa emhando yepamusoro makemikari uye Nanomaterials. Iyo kambani inotumira kune dzimwe nyika, zvakadai seUSA, Kanadha, Europe, UAE, Chamhembe Afrika, Tanzania, Kenya, Ijipita, Naijeriya, Kameruni, Uganda, Teki, Mekisiko, Azabhaijani, Bherujiyamu, Saipurasi, Czech Republic, Bhuraziri, Chire, Ajendina, Dubai, Japani, Korea, Vhetinamu, Tairendi, Marazhiya, Indonezhiya, Ositireriya,Jerimani, Furanzi, Itari, Portugal nezvimwe. Semugadziri anotungamira nanotechnology kuvandudza, RBOSCHCO inotonga pamusika. Chikwata chedu chebasa chehunyanzvi chinopa mhinduro dzakakwana kubatsira kuvandudza kugona kwemaindasitiri akasiyana, kugadzira kukosha, uye nyore nyore kubata nematambudziko akasiyana-siyana. Kana uri kutsvaga boron carbide mutengo pakg, ndapota tumira email kune: [email protected]
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