Reak\u010dne viazan\u00fd karbid krem\u00edka je mimoriadne odoln\u00fd keramick\u00fd materi\u00e1l, ktor\u00fd pon\u00faka v\u00fdnimo\u010dn\u00fa pevnos\u0165 proti n\u00e1razom a opotrebovaniu, odolnos\u0165 proti tepeln\u00fdm \u0161okom a chemick\u00fdm vplyvom.<\/p>\n
Formul\u00e1cie por\u00e9znych SiC a uhl\u00edkov\u00fdch \u010dast\u00edc sa po infiltr\u00e1cii kvapaln\u00fdm alebo plynn\u00fdm krem\u00edkom samovo\u013ene via\u017eu v d\u00f4sledku chemickej reakcie medzi krem\u00edkom a uhl\u00edkom. Krem\u00edk reaguje s uhl\u00edkom za vzniku \u010fal\u0161\u00edch \u010dast\u00edc karbidu krem\u00edka, ktor\u00e9 \u010falej sp\u00e1jaj\u00fa p\u00f4vodn\u00e9 \u010dastice.<\/p>\n
Reak\u010dne viazan\u00fd karbid krem\u00edka (RBSiC) je mimoriadne odoln\u00fd keramick\u00fd materi\u00e1l, ktor\u00fd pon\u00faka vynikaj\u00facu chemick\u00fa odolnos\u0165, pevnos\u0165 v n\u00e1raze, odolnos\u0165 proti opotrebovaniu a odolnos\u0165 vo\u010di tepeln\u00fdm \u0161okom. Vyr\u00e1ba sa infiltr\u00e1ciou roztaven\u00e9ho krem\u00edka do p\u00f3rovit\u00fdch uhl\u00edkov\u00fdch alebo grafitov\u00fdch predliskov, kde reaguje s uhl\u00edkom za vzniku SiC, a v\u010faka svojej vynikaj\u00facej pevnosti a vysokej \u0165a\u017enosti je RBSiC ide\u00e1lny pre procesy tv\u00e1rnenia v bl\u00edzkosti siete, ako je lisovanie, vstrekovanie a vytl\u00e1\u010danie, ktor\u00e9 umo\u017e\u0148uj\u00fa vytv\u00e1ra\u0165 ve\u013ek\u00e9 diely s mal\u00fdmi toleranciami.<\/p>\n
Ni\u017e\u0161ia tvrdos\u0165 RB SiC v porovnan\u00ed so spekan\u00fdm karbidom krem\u00edka u\u013eah\u010duje jeho tvarovanie, v\u010faka \u010domu sa zlo\u017eit\u00e9 kon\u0161truk\u010dn\u00e9 diely vyroben\u00e9 z tohto materi\u00e1lu \u013eah\u0161ie ako kedyko\u013evek predt\u00fdm tvaruj\u00fa a navrhuj\u00fa tak, aby chr\u00e1nili zariadenia pred odieran\u00edm a n\u00e1razmi, \u010d\u00edm sa zvy\u0161uje ich odolnos\u0165, ako aj bezpe\u010dnos\u0165. Okrem toho jeho odolnos\u0165 vo\u010di tepeln\u00fdm \u0161okom a schopnos\u0165 r\u00fdchlo sa zotavi\u0165 z r\u00fdchlych zmien teploty z neho rob\u00ed vynikaj\u00facu vo\u013ebu materi\u00e1lu na pou\u017eitie v elektr\u00e1r\u0148ach, oceliar\u0148ach, bansk\u00fdch prev\u00e1dzkach alebo v\u0161ade tam, kde musia zariadenia fungova\u0165 pri extr\u00e9mnych teplot\u00e1ch.<\/p>\n
RBSiC sa vyzna\u010duje nielen vynikaj\u00facou pevnos\u0165ou, ale aj v\u00fdnimo\u010dnou rozmerovou stabilitou a mimoriadnou odolnos\u0165ou proti kor\u00f3zii. Okrem toho sa RBSiC m\u00f4\u017ee pochv\u00e1li\u0165 extr\u00e9mne n\u00edzkym koeficientom tepelnej roz\u0165a\u017enosti a zachov\u00e1va si svoje mechanick\u00e9 vlastnosti aj pri vysok\u00fdch teplot\u00e1ch, v\u010faka \u010domu je vhodn\u00fd pre tunelov\u00e9 pece, hydraulick\u00e9 \u0161tiepacie \u010derpadl\u00e1 a in\u00e9 priemyseln\u00e9 pou\u017eitie. Okrem toho sa tento \u013eahk\u00fd materi\u00e1l d\u00e1 \u013eahko formova\u0165 do v\u00e4\u010d\u0161\u00edch komponentov pre aplik\u00e1cie, ako s\u00fa mechanick\u00e9 tesnenia a tlmi\u010de na regul\u00e1ciu prietoku v bansk\u00fdch prev\u00e1dzkach.<\/p>\n
Reak\u010dne viazan\u00e1 keramika z karbidu krem\u00edka odol\u00e1va teplot\u00e1m a\u017e do 1350 stup\u0148ov C bez toho, aby do\u0161lo k v\u00fdraznej zmene rozmerov, a m\u00e1 vynikaj\u00face vlastnosti chemickej odolnosti, v\u010faka \u010domu je ide\u00e1lna pre aplik\u00e1cie v \u0165a\u017eobnom priemysle, ako s\u00fa cykl\u00f3ny, tlmi\u010de na regul\u00e1ciu prietoku a ve\u013ek\u00e9 opotrebov\u00e1van\u00e9 komponenty.<\/p>\n
Reakt\u00edvna infiltr\u00e1cia taveniny (RMI) uhl\u00edkov\u00fdch predliskov zah\u0155\u0148a ich infiltr\u00e1ciu tekut\u00fdm krem\u00edkom prostredn\u00edctvom reakt\u00edvnej infiltr\u00e1cie taveniny (RMI). V r\u00e1mci procesu RMI kvapaln\u00fd krem\u00edk prenik\u00e1 kapil\u00e1rnou silou do p\u00f3rov a reaguje s amorfn\u00fdm uhl\u00edkom za vzniku b-SiC. Zvy\u0161n\u00e9 nezreagovan\u00e9 uhl\u00edkov\u00e9 \u010dastice a nezreagovan\u00fd uhl\u00edk sa zu\u0161\u013each\u0165uj\u00fa prostredn\u00edctvom viacf\u00e1zov\u00e9ho uhl\u00edka, \u010d\u00edm sa \u010falej zjem\u0148uje p\u00f3rovitos\u0165 a zni\u017euje sa tvorba ostrov\u010dekov v r\u00e1mci RB-SiC v r\u00e1mci tvorby siete s vynikaj\u00facimi rozmerov\u00fdmi toleranciami.<\/p>\n
Reak\u010dne viazan\u00fd karbid krem\u00edka prekon\u00e1va spekan\u00fd karbid krem\u00edka t\u00fdm, \u017ee m\u00e1 vy\u0161\u0161iu tepeln\u00fa vodivos\u0165 a ni\u017e\u0161\u00ed koeficient roz\u0165a\u017enosti pri vysok\u00fdch teplot\u00e1ch, v\u010faka \u010domu je vhodnej\u0161\u00ed na aplik\u00e1cie, v ktor\u00fdch prevl\u00e1daj\u00fa vibr\u00e1cie, n\u00e1razy, odieranie alebo tepeln\u00e9 \u0161oky. V\u010faka tomu je karbid krem\u00edka viazan\u00fd reakciou ide\u00e1lnou vo\u013ebou materi\u00e1lu v prostrediach, ako s\u00fa priemyseln\u00e9 stroj\u00e1rske dielne.<\/p>\n
Reak\u010dne viazan\u00fd karbid krem\u00edka pon\u00faka vynikaj\u00facu odolnos\u0165 vo\u010di vysokoteplotnej kor\u00f3zii, ako aj pas\u00edvnej a akt\u00edvnej oxid\u00e1cii, v\u010faka \u010domu je vhodn\u00fd na v\u00fdrobu ve\u013ekorozmern\u00fdch s\u00fa\u010diastok so svojou rozmerovou stabilitou, vysokou pevnos\u0165ou, chemickou odolnos\u0165ou a odolnos\u0165ou vo\u010di oderu. Mo\u017eno ho \u013eahko formova\u0165 do r\u00f4znych tvarov a ve\u013ekost\u00ed. V\u010faka svojej tvarovate\u013enosti je obzvl\u00e1\u0161\u0165 vhodn\u00fd na v\u00fdrobu ve\u013ek\u00fdch a zlo\u017eit\u00fdch komponentov.<\/p>\n
Reak\u010dne viazan\u00fd karbid krem\u00edka (RB SiC) m\u00e1 vynikaj\u00facu odolnos\u0165 proti teplotn\u00fdm \u0161okom, v\u010faka \u010domu je vhodn\u00fd pre aplik\u00e1cie, kde s\u00fa be\u017en\u00e9 extr\u00e9mne teploty. Je to sp\u00f4soben\u00e9 jeho n\u00edzkym koeficientom tepelnej roz\u0165a\u017enosti, \u010do znamen\u00e1, \u017ee sa pri r\u00fdchlych zmen\u00e1ch teploty v\u00fdrazne neroz\u0165ahuje ani nezmen\u0161uje. Okrem toho sa m\u00f4\u017ee pochv\u00e1li\u0165 jednou z najvy\u0161\u0161\u00edch hodn\u00f4t tvrdosti medzi technick\u00fdmi materi\u00e1lmi, v\u010faka \u010domu je RB SiC neuverite\u013ene tvrd\u00fd a odoln\u00fd.<\/p>\n
RB SiC dobre odol\u00e1va n\u00e1razom, v\u010faka \u010domu je vynikaj\u00facou vo\u013ebou materi\u00e1lu pre mechanick\u00e9 tesnenia, v\u00fdstelky potrub\u00ed, mechanick\u00e9 komponenty, tlmi\u010de na regul\u00e1ciu prietoku a v\u00e4\u010d\u0161ie opotrebovan\u00e9 komponenty v \u0165a\u017eobnom priemysle a \u0165a\u017ek\u00fdch strojoch. Vyr\u00e1ba sa vstrekovan\u00edm roztaven\u00e9ho krem\u00edka do por\u00e9znych uhl\u00edkov\u00fdch alebo grafitov\u00fdch predliskov a reakciou s uhl\u00edkom za vzniku karbidu krem\u00edka; tvary a ve\u013ekosti sa m\u00f4\u017eu prisp\u00f4sobi\u0165 v z\u00e1vislosti od \u0161pecifick\u00fdch po\u017eiadaviek na aplik\u00e1ciu.<\/p>\n
She et al. vykonali testy karbidu krem\u00edka RB s cie\u013eom vyhodnoti\u0165 jeho odolnos\u0165 vo\u010di tepeln\u00fdm \u0161okom, a to vyhodnoten\u00edm jeho pevnosti v \u0161tvorbodovom ohybe po vystaven\u00ed zv\u00fd\u0161eniu teploty z izbovej teploty a\u017e na 1 000 stup\u0148ov Celzia. Ich zistenia uk\u00e1zali, \u017ee tepeln\u00e9 nam\u00e1hanie sp\u00f4sobuje poruchy v keramike viazanej vl\u00e1knami s trhlinami \u0161\u00edriacimi sa medzi vl\u00e1knit\u00fdmi prvkami a cez ich rozhrania; ich zdroje uhl\u00edka pou\u017eit\u00e9 po\u010das reak\u010dn\u00e9ho spekania, ako s\u00fa uhl\u00edkov\u00e9 sadze alebo hrub\u00fd mikrosf\u00e9rick\u00fd grafitovan\u00fd uhl\u00edk, ur\u010dovali spr\u00e1vanie materi\u00e1lu.<\/p>\n
Reak\u010dne viazan\u00fd karbid krem\u00edka (RB SiC) je keramick\u00fd materi\u00e1l s vysokou hustotou a vynikaj\u00facimi vlastnos\u0165ami odolnosti vo\u010di chemick\u00fdm l\u00e1tkam a kor\u00f3znemu po\u0161kodeniu vr\u00e1tane kysel\u00edn, z\u00e1sad a rozp\u00fa\u0161\u0165adiel, ako aj odolnosti vo\u010di kor\u00f3znemu po\u0161kodeniu. V\u010faka svojmu n\u00edzkemu koeficientu roz\u0165a\u017enosti m\u00f4\u017ee by\u0165 prisp\u00f4soben\u00fd pre mnoh\u00e9 tvary a ve\u013ekosti vr\u00e1tane mechanick\u00fdch tesnen\u00ed, tlmiviek na regul\u00e1ciu prietoku, \u010derpadiel a ve\u013ek\u00fdch komponentov podliehaj\u00facich opotrebovaniu, ktor\u00e9 sa be\u017ene vyskytuj\u00fa v bansk\u00fdch cykl\u00f3nov\u00fdch aplik\u00e1ci\u00e1ch.<\/p>\n
Karbid krem\u00edka vyroben\u00fd infiltr\u00e1ciou p\u00f3rovit\u00fdch uhl\u00edkov\u00fdch alebo grafitov\u00fdch predliskov tekut\u00fdm alebo plynn\u00fdm krem\u00edkom je pevnej\u0161\u00ed a m\u00e1 lep\u0161iu tepeln\u00fa stabilitu ako spekan\u00e9 druhy. Preto je t\u00e1to forma ide\u00e1lna pre aplik\u00e1cie, ktor\u00e9 vy\u017eaduj\u00fa ni\u017e\u0161iu tvrdos\u0165, ale vy\u0161\u0161iu teplotn\u00fa stabilitu.<\/p>\n
Kor\u00f3zne po\u0161kodenie RB SiC keramiky je minim\u00e1lne, s vynikaj\u00facou odolnos\u0165ou vo\u010di oxid\u00e1cii, kyseline chlorovod\u00edkovej, kyseline s\u00edrovej, kyseline hydrobr\u00f3movej a siln\u00fdm z\u00e1sad\u00e1m. Okrem toho jej n\u00edzka priepustnos\u0165 pom\u00e1ha dosiahnu\u0165 v\u00fdnimo\u010dn\u00fa chemick\u00fa odolnos\u0165.<\/p>\n
Spekan\u00fd karbid krem\u00edka je zvy\u010dajne drah\u0161\u00ed ako RB SiC; m\u00f4\u017ee v\u0161ak by\u0165 u\u017eito\u010dn\u00fd v aplik\u00e1ci\u00e1ch, kde s\u00fa prijate\u013en\u00e9 n\u00edzke \u00farovne tvrdosti, ale vy\u017eaduje sa lep\u0161ia tepeln\u00e1 stabilita. RB SiC pon\u00faka v\u00e4\u010d\u0161iu v\u00fdrobn\u00fa flexibilitu a je cenovo v\u00fdhodnej\u0161\u00ed ako spekan\u00fd karbid krem\u00edka.<\/p>","protected":false},"excerpt":{"rendered":"
Reaction-bonded silicon carbide is an ultra-resilient ceramic material that offers exceptional strength against impact and wear, thermal shock resistance, and chemical attack. Formulations of porous SiC and carbon particles, when infiltrated with liquid or gaseous silicon, become self-bonding due to chemical reaction between silicon and carbon. Silicon reacts with carbon to form additional silicon carbide […]<\/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":"","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":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","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":[64],"tags":[],"class_list":["post-331","post","type-post","status-publish","format-standard","hentry","category-knowledge"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/posts\/331","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/comments?post=331"}],"version-history":[{"count":1,"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/posts\/331\/revisions"}],"predecessor-version":[{"id":332,"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/posts\/331\/revisions\/332"}],"wp:attachment":[{"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/media?parent=331"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/categories?post=331"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/tags?post=331"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}