{"id":361,"date":"2024-10-31T13:45:10","date_gmt":"2024-10-31T05:45:10","guid":{"rendered":"https:\/\/siliconcarbideceramic.net\/?p=361"},"modified":"2024-12-21T21:24:57","modified_gmt":"2024-12-21T13:24:57","slug":"reactie-lipita-sic-performanta-optima-pentru-conditii-extreme","status":"publish","type":"post","link":"https:\/\/siliconcarbideceramic.net\/ro\/reaction-bonded-sic-optimal-performance-for-extreme-conditions\/","title":{"rendered":"SiC legat prin reac\u021bie: performan\u021b\u0103 optim\u0103 pentru condi\u021bii extreme"},"content":{"rendered":"

Reaction Bonded SiC - Performan\u021b\u0103 optim\u0103 \u00een condi\u021bii extreme<\/h1>\n

Reaction Bonded SiC (RBSC) este un material ceramic dens compus din carbur\u0103 de siliciu \u0219i particule de carbon. Arderea duce la modific\u0103ri minime ale dimensiunilor sale, permi\u021b\u00e2nd producerea unei forme aproape nete f\u0103r\u0103 costuri suplimentare de prelucrare dup\u0103 ardere.<\/p>\n

S-a constatat c\u0103 structurile porilor RBSC depind de mai multe variabile-cheie legate de gradul de grafitizare, dimensiunea \u0219i morfologia surselor de carbon; influen\u021ba acestora asupra reactivit\u0103\u021bii carbonului fa\u021b\u0103 de siliciul topit a fost imens\u0103.<\/p>\n

Rezisten\u021b\u0103 ridicat\u0103<\/h2>\n

Carbura de siliciu este un material extrem de puternic \u0219i rigid care poate rezista la niveluri ridicate de stres f\u0103r\u0103 a-\u0219i pierde integritatea structural\u0103. Datorit\u0103 densit\u0103\u021bii sale reduse \u0219i rigidit\u0103\u021bii specifice ridicate, carbura de siliciu este un material de dorit \u00een situa\u021bii precum telescoapele spa\u021biale, unde trebuie luate \u00een considerare restric\u021biile de greutate.<\/p>\n

Iner\u021bia chimic\u0103 a RB SiC \u00eel face ideal pentru aplica\u021bii \u00een care intr\u0103 \u00een contact cu substan\u021be chimice agresive. \u00cen plus, rezisten\u021ba sa la \u0219ocuri de temperatur\u0103 \u00eei permite s\u0103 suporte schimb\u0103rile bru\u0219te ale condi\u021biilor de mediu.<\/p>\n

Pentru a cre\u0219te rezisten\u021ba la flexiune \u0219i modulul elastic al RB SiC, am studiat modul \u00een care diferite con\u021binuturi de carbon afecteaz\u0103 microstructura sa. Prin utilizarea unei solu\u021bii de precursor compozit de precursori PF \u0219i FA, am reu\u0219it s\u0103 control\u0103m at\u00e2t con\u021binutul, c\u00e2t \u0219i cristalinitatea carbonului \u00een preforma noastr\u0103 poroas\u0103, produc\u00e2nd RB SiC cu propriet\u0103\u021bi mai ridicate de rezisten\u021b\u0103 la flexiune \u0219i modul elastic.<\/p>\n

Conductivitate termic\u0103 ridicat\u0103<\/h2>\n

SiC are o conductivitate termic\u0103 ridicat\u0103, cu o conductivitate aproximativ\u0103 de 300 W\/mK - f\u0103c\u00e2nd din RBSC o op\u021biune excelent\u0103 pentru aplica\u021biile care necesit\u0103 performan\u021be la temperaturi ridicate.<\/p>\n

RBSC se m\u00e2ndre\u0219te cu o rezisten\u021b\u0103 excelent\u0103 la uzura abraziv\u0103 \u0219i eroziv\u0103, ceea ce \u00eel face ideal pentru mediile industriale solicitante. \u00cen plus, coeficientul s\u0103u sc\u0103zut de dilatare termic\u0103 permite fluctua\u021bii rapide de temperatur\u0103 f\u0103r\u0103 a compromite integritatea structural\u0103.<\/p>\n

Distribu\u021bia granulometric\u0103 a materiilor prime utilizate \u00een prepararea preformelor RBSC are un efect enorm asupra microstructurii \u0219i propriet\u0103\u021bilor fizice ale acestora, cum ar fi rezisten\u021ba la flexiune \u0219i valorile modulului elastic. O cre\u0219tere a con\u021binutului de negru de fum are ca rezultat o microstructur\u0103 \u00eembun\u0103t\u0103\u021bit\u0103, cu valori mai mari ale rezisten\u021bei la flexiune \u0219i ale modulului elastic \u00een produse finite cu o microstructur\u0103 mai bun\u0103.<\/p>\n

Expansiune la temperaturi sc\u0103zute<\/h2>\n

Reaction Bonded SiC ofer\u0103 aplica\u021biilor care necesit\u0103 rezisten\u021b\u0103 la temperaturi ridicate o capacitate remarcabil\u0103 de dilatare termic\u0103, ob\u021binut\u0103 prin utilizarea negrului de carbon \u0219i a grafitului micro-sferic \u00een procesul s\u0103u de fabrica\u021bie. Compozi\u021bia, structura \u0219i propriet\u0103\u021bile Reaction Bonded SiC variaz\u0103 \u00een func\u021bie de con\u021binutul de carbon, propor\u021bia, morfologia \u0219i forma surselor de carbon utilizate.<\/p>\n

Lipirea prin reac\u021bie ofer\u0103 o metod\u0103 eficient\u0103 de producere a materialelor ceramice, cum ar fi materialele refractare, corpurile filtrante poroase \u0219i componentele de uzur\u0103, cum ar fi garniturile mecanice \u0219i rulmen\u021bii.<\/p>\n

RB SiC este un material extrem de robust \u0219i fiabil care exceleaz\u0103 \u00een mai multe medii. Datorit\u0103 ratei sale sc\u0103zute de dilatare termic\u0103, acest material este perfect pentru aplica\u021bii care necesit\u0103 o stabilitate dimensional\u0103 precis\u0103, cum ar fi pompe, rulmen\u021bi \u0219i bobine de control al debitului. \u00cen plus, acest material versatil poate fi utilizat \u0219i pentru fabricarea componentelor pentru echipamentele de produc\u021bie a semiconductorilor, cum ar fi componentele de manipulare a pl\u0103cilor.<\/p>\n

Fric\u021biune redus\u0103<\/h2>\n

Carbura de siliciu legat\u0103 prin reac\u021bie (RBSC) este un material ceramic adaptabil, capabil s\u0103 fie modelat \u00een forme complicate pentru utiliz\u0103ri profesionale \u0219i industriale. RBSC se m\u00e2ndre\u0219te cu o rezisten\u021b\u0103 excelent\u0103 la uzur\u0103, cu un coeficient sc\u0103zut de dilatare, cu rezisten\u021b\u0103 la coroziune, precum \u0219i cu propriet\u0103\u021bi electrice remarcabile.<\/p>\n

RBSC este produs prin infiltrarea preformelor poroase din carbur\u0103 de siliciu cu siliciu lichid. Se creeaz\u0103 astfel o ceramic\u0103 cu o structur\u0103 impermeabil\u0103, rezistent\u0103 la fluide moderat caustice \u0219i acide, precum \u0219i la hidrocarburi u\u0219oare. \u00cen plus, compozi\u021bia sa impermeabil\u0103 \u0219i textura suprafe\u021bei reduc frecarea pentru a prelungi durata de via\u021b\u0103 a componentelor \u0219i este u\u0219oar\u0103 \u0219i rigid\u0103, ceea ce o face potrivit\u0103 pentru telescoapele spa\u021biale unde exist\u0103 limite de greutate a sarcinii utile; suprafa\u021ba sa foarte stabil\u0103 din punct de vedere dimensional adaug\u0103 \u0219i mai mult\u0103 valoare.<\/p>\n

Rezisten\u021b\u0103 chimic\u0103 ridicat\u0103<\/h2>\n

Reaction Bonded SiC este foarte rezistent la coroziunea chimic\u0103, ceea ce \u00eel face ideal pentru mediile care utilizeaz\u0103 materiale corozive. \u00cen plus, expansiunea termic\u0103 redus\u0103 \u0219i rezisten\u021ba sa \u00eei permit s\u0103 reziste la temperaturi extreme.<\/p>\n

Produc\u021bia legat\u0103 prin reac\u021bie implic\u0103 injectarea siliciului topit \u00een materialul poros de carbon ambalat \u00een forma piesei dorite, unde reac\u021bioneaz\u0103 apoi cu moleculele de carbon pentru a forma carbur\u0103 de siliciu.<\/p>\n

Cercet\u0103rile au stabilit c\u0103 rezisten\u021ba la flexiune, modulul de elasticitate \u0219i porozitatea ceramicii RBSC depind de con\u021binutul \u0219i propor\u021bia de material surs\u0103 de carbon. Realizarea unei grada\u021bii rezonabile at\u00e2t \u00een ceea ce prive\u0219te sursa de carbon, c\u00e2t \u0219i morfologia \u00eembun\u0103t\u0103\u021be\u0219te semnificativ performan\u021ba; acest lucru asigur\u0103 o distribu\u021bie uniform\u0103 a particulelor de sic libere \u00een cadrul microstructurii compacte \u0219i propriet\u0103\u021bi superioare pentru produsele finale.<\/p>\n

\"Reaction<\/p>","protected":false},"excerpt":{"rendered":"

Reaction Bonded SiC – Optimal Performance for Extreme Conditions Reaction Bonded SiC (RBSC) is a dense ceramic material composed of […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"footnotes":""},"categories":[5],"tags":[],"class_list":["post-361","post","type-post","status-publish","format-standard","hentry","category-product-related"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/siliconcarbideceramic.net\/ro\/wp-json\/wp\/v2\/posts\/361","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/siliconcarbideceramic.net\/ro\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/siliconcarbideceramic.net\/ro\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/ro\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/ro\/wp-json\/wp\/v2\/comments?post=361"}],"version-history":[{"count":3,"href":"https:\/\/siliconcarbideceramic.net\/ro\/wp-json\/wp\/v2\/posts\/361\/revisions"}],"predecessor-version":[{"id":383,"href":"https:\/\/siliconcarbideceramic.net\/ro\/wp-json\/wp\/v2\/posts\/361\/revisions\/383"}],"wp:attachment":[{"href":"https:\/\/siliconcarbideceramic.net\/ro\/wp-json\/wp\/v2\/media?parent=361"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/ro\/wp-json\/wp\/v2\/categories?post=361"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/ro\/wp-json\/wp\/v2\/tags?post=361"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}