A szil\u00edciumkarbid kiv\u00e1l\u00f3 tulajdons\u00e1gainak k\u00f6sz\u00f6nhet\u0151en sz\u00e1mos ipari alkalmaz\u00e1ssal rendelkezik. Ezek k\u00f6z\u00e9 tartozik a korr\u00f3zi\u00f3val, oxid\u00e1ci\u00f3val \u00e9s h\u0151hat\u00e1ssal szembeni ellen\u00e1ll\u00e1sa.<\/p>\n
A reakt\u00edv k\u00f6t\u00e9s\u0171 SiC-t szinterel\u00e9si elj\u00e1r\u00e1ssal \u00e1ll\u00edtj\u00e1k el\u0151 \u00fagy, hogy foly\u00e9kony szil\u00edciumot sziv\u00e1rogtatnak a szil\u00edciumkarbid por\u00f3zus z\u00f6ld testekbe, majd nyom\u00e1s alatt inf\u00fazi\u00f3val. A k\u00e9sz anyag t\u00f6r\u00e9si sz\u00edv\u00f3ss\u00e1ga alacsony.<\/p>\n
A szil\u00edcium-karbid ker\u00e1mi\u00e1k rendk\u00edv\u00fcl kem\u00e9ny fel\u00fclet\u00fckr\u0151l ismertek, amelyek kiv\u00e1l\u00f3 kop\u00e1s-, korr\u00f3zi\u00f3- \u00e9s h\u0151\u00e1ll\u00f3s\u00e1gi tulajdons\u00e1gokkal rendelkeznek. Ezenk\u00edv\u00fcl ez az anyag kiv\u00e1l\u00f3 oxid\u00e1ci\u00f3\u00e1ll\u00f3s\u00e1gi tulajdons\u00e1gokkal rendelkezik, valamint er\u0151s magas h\u0151m\u00e9rs\u00e9kleti szil\u00e1rds\u00e1gi szintekkel, k\u00e9miai stabilit\u00e1si tulajdons\u00e1gokkal, valamint mechanikai kem\u00e9nys\u00e9gi tulajdons\u00e1gokkal.<\/p>\n
A k\u00fcl\u00f6nb\u00f6z\u0151 szabv\u00e1nyos m\u00e9retekben \u00e9s geometri\u00e1kban kaphat\u00f3 szilikont\u00f6m\u00edt\u00e9sek a technol\u00f3giai berendez\u00e9sek alkalmaz\u00e1saihoz kiv\u00e1l\u00f3 kop\u00e1s\u00e1ll\u00f3s\u00e1got biztos\u00edtanak, cs\u00f6kkentett s\u00farl\u00f3d\u00e1ssal a szivatty\u00fat\u00f6m\u00edt\u00e9sek p\u00e1rhuzamos alkatr\u00e9szeivel szemben.<\/p>\n
A szinterezett szil\u00edciumkarbid er\u00f3zi\u00f3- \u00e9s kop\u00e1s\u00e1ll\u00f3s\u00e1ga tov\u00e1bb n\u00f6velhet\u0151 b\u00f3r- vagy volfr\u00e1mkarbidok alkalmaz\u00e1s\u00e1val, \u00e9s ezek a speci\u00e1lis min\u0151s\u00e9gek a kiss\u00e9 magasabb nyersanyag- \u00e9s gy\u00e1rt\u00e1si k\u00f6lts\u00e9gek ellen\u00e9re is jobb anyagmechanik\u00e1t k\u00edn\u00e1lnak magas h\u0151m\u00e9rs\u00e9kleten.<\/p>\n
A SiC-ker\u00e1mi\u00e1k reakci\u00f3k\u00f6t\u00e9se vagy nyom\u00e1s n\u00e9lk\u00fcli szinterez\u00e9se k\u00fcl\u00f6nb\u00f6z\u0151 mikroszerkezeteket eredm\u00e9nyez, \u00e9s a v\u00e1lasztott form\u00e1z\u00e1si m\u00f3dszer hat\u00e1rozza meg a v\u00e9geredm\u00e9nyt. A reakci\u00f3k\u00f6t\u00e9ses szil\u00edciumkarbid alacsonyabb feldolgoz\u00e1si h\u0151m\u00e9rs\u00e9kletet, kiv\u00e1l\u00f3 alak\u00edthat\u00f3s\u00e1got \u00e9s alacsonyabb k\u00f6lts\u00e9geket k\u00edn\u00e1l, mint a nyom\u00e1s n\u00e9lk\u00fcli szinterezett SiC; azonban a magas h\u0151m\u00e9rs\u00e9klet\u0171 szil\u00e1rds\u00e1ga \u00e9s hajl\u00edt\u00f3szil\u00e1rds\u00e1ga gyeng\u00e9bb, mint a nyom\u00e1s n\u00e9lk\u00fcli szinterezett SiC-\u00e9; ez\u00e9rt a reakci\u00f3k\u00f6t\u00e9ses szil\u00edciumkarbid jobban alkalmazhat\u00f3 olyan alkalmaz\u00e1sokban, amelyek nem k\u00f6vetelik meg a maxim\u00e1lis teljes\u00edtm\u00e9nyt a ker\u00e1miaanyagt\u00f3l.<\/p>\n
A szil\u00edcium-karbid ker\u00e1mia a ker\u00e1mi\u00e1k k\u00f6z\u00fcl az egyik legmagasabb korr\u00f3zi\u00f3\u00e1ll\u00f3s\u00e1gi \u00e9rt\u00e9kkel b\u00fcszk\u00e9lkedhet, \u00e9s figyelemre m\u00e9lt\u00f3 kem\u00e9nys\u00e9g\u00e9nek, szil\u00e1rds\u00e1g\u00e1nak, h\u0151vezet\u0151 k\u00e9pess\u00e9g\u00e9nek \u00e9s kop\u00e1s\u00e1ll\u00f3s\u00e1gi tulajdons\u00e1gainak k\u00f6sz\u00f6nhet\u0151en m\u00e9g a s\u00falyos k\u00e9miai k\u00f6rnyezeteknek is ellen\u00e1ll. A szil\u00edcium-karbid tov\u00e1bb\u00e1 kiv\u00e1l\u00f3 oxid\u00e1ci\u00f3\u00e1ll\u00f3s\u00e1got, valamint kop\u00e1s\u00e1ll\u00f3s\u00e1gi tulajdons\u00e1gokat k\u00edn\u00e1l.<\/p>\n
A szinterezett szil\u00edciumkarbidot (SSiC) finom szemcs\u00e9s SiC por \u00e9s nem oxidos szinterez\u00e9si seg\u00e9danyagok pasztaszer\u0171 kever\u00e9kk\u00e9 t\u00f6rt\u00e9n\u0151 pr\u00e9sel\u00e9s\u00e9vel \u00e9s szinterez\u00e9s\u00e9vel (meleg\u00edt\u00e9s\u00e9vel) \u00e1ll\u00edtj\u00e1k el\u0151, amely ezut\u00e1n az alkalmaz\u00e1shoz sz\u00fcks\u00e9ges m\u00f3don t\u00f6m\u00f6r\u00edthet\u0151 vagy alak\u00edthat\u00f3, vagy szersz\u00e1mokon kereszt\u00fcl szinterezett szil\u00edciumkarbid cs\u00f6vekk\u00e9 pr\u00e9selhet\u0151.<\/p>\n
A reakt\u00edv szinterez\u00e9s t\u00f6bbelem\u0171 eutektikus oxidok (p\u00e9ld\u00e1ul Y2O3-Al2O3) kever\u00e9s\u00e9t jelenti alacsony eutektikus h\u0151m\u00e9rs\u00e9kleten, hogy foly\u00e9kony f\u00e1zist k\u00e9pezzen a SiC-r\u00e9szecsk\u00e9k mozg\u00e1s\u00e1hoz, diff\u00fazi\u00f3j\u00e1hoz, t\u00f6meg\u00e1tad\u00e1s\u00e1hoz a s\u0171r\u00edt\u00e9s sor\u00e1n a pontos m\u00e9retekkel rendelkez\u0151 szinterezett ker\u00e1miaterm\u00e9kekbe; azonban h\u00e1tr\u00e1nyai vannak, mint a dr\u00e1ga nyersanyagfogyaszt\u00e1s \u00e9s energiak\u00f6lts\u00e9gek, valamint a korr\u00f3zi\u00f3s viselked\u00e9s a s\u0171r\u00edt\u00e9s sor\u00e1n, amelyet gondosan kell kezelni a SiC-ker\u00e1mia legjobb teljes\u00edtm\u00e9nye \u00e9rdek\u00e9ben.<\/p>\n
A szil\u00edciumkarbid ellen\u00e1ll a magas h\u0151m\u00e9rs\u00e9kletnek, \u00edgy kiv\u00e1l\u00f3 anyag a vegyipari feldolgoz\u00f3 berendez\u00e9sekben, p\u00e9ld\u00e1ul kemenc\u00e9kben val\u00f3 felhaszn\u00e1l\u00e1sra. Tov\u00e1bb\u00e1 a k\u00e9miai korr\u00f3zi\u00f3\u00e1ll\u00f3s\u00e1ga miatt ak\u00e1r 1 900 \u00b0C-os h\u0151m\u00e9rs\u00e9kletet is kib\u00edr, mik\u00f6zben nagyszer\u0171 mechanikai kem\u00e9nys\u00e9gi tulajdons\u00e1gokkal b\u00fcszk\u00e9lkedhet.<\/p>\n
A reakci\u00f3k\u00f6t\u00e9s\u0171 SiC-ker\u00e1mi\u00e1kat por\u00f3zus sz\u00e9n alapanyagb\u00f3l \u00e9s olvasztott szil\u00edciumb\u00f3l \u00e1ll\u00edtj\u00e1k el\u0151, \u00e9s olyan m\u00f3dszerekkel alak\u00edtj\u00e1k ki, mint a sz\u00e1raz pr\u00e9sel\u00e9s, \u00f6nt\u00e9s \u00e9s extrud\u00e1l\u00e1s. Gyakran alkalmazz\u00e1k \u0151ket a ballisztikus fenyeget\u00e9sek ellen haszn\u00e1lt kompozit p\u00e1nc\u00e9lrendszerekben.<\/p>\n
A nyom\u00e1s n\u00e9lk\u00fcl szinterezett szil\u00edciumkarbid (PSiC) egy fejlett anyag, amely rendk\u00edv\u00fcli szil\u00e1rds\u00e1ggal, kem\u00e9nys\u00e9ggel \u00e9s h\u0151vezet\u0151 k\u00e9pess\u00e9ggel, valamint korr\u00f3zi\u00f3val, oxid\u00e1ci\u00f3val \u00e9s hajl\u00edt\u00e1ssal szembeni ellen\u00e1ll\u00e1ssal rendelkezik - ide\u00e1lis olyan alkatr\u00e9szekhez, mint a f\u00fav\u00f3k\u00e1k, t\u00f6m\u00edt\u00e9sek \u00e9s kop\u00f3gy\u0171r\u0171k.<\/p>\n
A PSiC szinterel\u00e9si hat\u00e9konys\u00e1g\u00e1nak n\u00f6vel\u00e9se \u00e9rdek\u00e9ben foly\u00e9kony f\u00e1zis hozhat\u00f3 l\u00e9tre egy vagy t\u00f6bb t\u00f6bb elemet tartalmaz\u00f3 eutektikus oxid, p\u00e9ld\u00e1ul Y2O3-Al2O3 hozz\u00e1ad\u00e1s\u00e1val, amelyek alacsony eutektikus ponttal rendelkeznek, \u00e9s el\u0151seg\u00edtik a SiC-r\u00e9szecsk\u00e9k mozg\u00e1s\u00e1t, diff\u00fazi\u00f3j\u00e1t \u00e9s \u00e1trendez\u0151d\u00e9s\u00e9t, ami a term\u00e9k s\u0171r\u0171s\u00f6d\u00e9s\u00e9t eredm\u00e9nyezi. Ennek eredm\u00e9nyek\u00e9nt az el\u0151\u00e1ll\u00edtott SiC-ker\u00e1mi\u00e1k kiv\u00e1l\u00f3 hajl\u00edt\u00f3szil\u00e1rds\u00e1ggal \u00e9s h\u0151m\u00e9rs\u00e9klet-ellen\u00e1ll\u00f3s\u00e1gi jellemz\u0151kkel rendelkeznek.<\/p>\n
A szinterezett szil\u00edciumkarbid nagy szil\u00e1rds\u00e1ggal b\u00fcszk\u00e9lkedhet, amely magas h\u0151m\u00e9rs\u00e9kleten is viszonylag \u00e1lland\u00f3 marad, \u00edgy sz\u00e1mos alkalmaz\u00e1shoz kiv\u00e1l\u00f3 anyagv\u00e1laszt\u00e1s. Ezenfel\u00fcl a k\u00e9miai korr\u00f3zi\u00f3\u00e1ll\u00f3s\u00e1ga miatt sz\u00e1mos ipari k\u00f6rnyezetben alkalmazhat\u00f3.<\/p>\n
A reakci\u00f3k\u00f6t\u00e9s\u0171 szil\u00edciumkarbid (RBSiC) viszont \u00fagy j\u00f6n l\u00e9tre, hogy az olvadt szil\u00edciumot por\u00f3zus sz\u00e9n- vagy grafit-el\u0151form\u00e1kba sziv\u00e1rogtatj\u00e1k, \u00e9s ezek strukt\u00far\u00e1i k\u00f6z\u00f6tt por\u00f3zus ter\u00fcleteket hoznak l\u00e9tre. Az RBSiC kisebb szil\u00e1rds\u00e1ggal \u00e9s kem\u00e9nys\u00e9ggel rendelkezik, mint az SSiC, de nagyobb k\u00e9miai \u00e9s termikus sokk\u00e1ll\u00f3s\u00e1got biztos\u00edt.<\/p>\n
A szinterez\u00e9s lehet\u0151v\u00e9 teszi a pontos m\u00e9retekkel \u00e9s s\u0171r\u0171s\u00e9ggel rendelkez\u0151 ker\u00e1miaterm\u00e9kek el\u0151\u00e1ll\u00edt\u00e1s\u00e1t, de vannak h\u00e1tr\u00e1nyai is: a magas szinterel\u00e9si h\u0151m\u00e9rs\u00e9klet a s\u0171r\u00edt\u00e9s sor\u00e1n zsugorod\u00e1st okozhat; tov\u00e1bb\u00e1 ez az elj\u00e1r\u00e1s reped\u00e9seket hozhat l\u00e9tre az anyagban, ami egyenetlen k\u00e9miai \u00f6sszet\u00e9telhez vagy s\u0171r\u0171s\u00e9ghez vezethet, ami befoly\u00e1solhatja a teljes\u00edtm\u00e9nyt, ha oxid\u00e1l\u00f3 vagy korroz\u00edv k\u00f6rnyezetnek van kit\u00e9ve. Ez\u00e9rt a legt\u00f6bb kutat\u00f3 a folyad\u00e9kf\u00e1zis\u00fa szinterez\u00e9st v\u00e1lasztja, amely k\u00f6rnyezetbar\u00e1tabb is.<\/p>\n
A szil\u00edciumkarbid az egyik legkem\u00e9nyebb \u00e9s leger\u0151sebb anyag a F\u00f6ld\u00f6n. Ez a kombin\u00e1ci\u00f3 ellen\u00e1ll\u00f3v\u00e1 teszi a korr\u00f3zi\u00f3val, kop\u00e1ssal \u00e9s h\u0151hat\u00e1sokkal szemben, mik\u00f6zben j\u00f3 kop\u00e1s\u00e1ll\u00f3s\u00e1got \u00e9s alacsony cs\u00fasz\u00e1si s\u00farl\u00f3d\u00e1st biztos\u00edt sz\u00e1mos k\u00fcl\u00f6nb\u00f6z\u0151 p\u00e1rhuzamos anyaggal szemben.<\/p>\n
A szinterezett SiC-ker\u00e1mi\u00e1k nagy szil\u00e1rds\u00e1gukat a SiC-r\u00e9szecsk\u00e9k k\u00f6z\u00f6tti er\u0151s szinterk\u00f6t\u00e9sek kialakul\u00e1s\u00e1val \u00e9rik el. A szil\u00edciumkarbid nyom\u00e1s n\u00e9lk\u00fcli szinterez\u00e9se vagy forr\u00f3 izosztatikus pr\u00e9sel\u00e9se gyakorlatilag p\u00f3rusmentes term\u00e9keket eredm\u00e9nyez, ami tov\u00e1bb jav\u00edtja a ker\u00e1miaterm\u00e9kek mechanikai tulajdons\u00e1gait.<\/p>\n
A reakci\u00f3k\u00f6t\u00e9s\u0171 szil\u00edciumkarbid (RSIC) a HPSIC-hez vagy HIPSIC-hez k\u00e9pest nyitottabb porozit\u00e1ssal \u00e9s durv\u00e1bb szemcseszerkezettel rendelkezik, ami cs\u00f6kkenti a hajl\u00edt\u00f3szil\u00e1rds\u00e1g\u00e1t, \u00e9s kev\u00e9sb\u00e9 teszi alkalmass\u00e1 magas h\u0151m\u00e9rs\u00e9klet\u0171 alkalmaz\u00e1sokhoz.<\/p>\n
A k\u00f6zvetlen\u00fcl szinterezett szil\u00edciumkarbid finomabb szemcs\u00e9kkel rendelkezik, mint az RSIC, \u00e9s ez\u00e9rt nagyobb ellen\u00e1ll\u00e1st ny\u00fajt az oxid\u00e1ci\u00f3val szemben, \u00edgy dr\u00e1g\u00e1bb, mint t\u00e1rsa, de kiv\u00e1l\u00f3 kop\u00e1si, h\u0151- \u00e9s magas h\u0151m\u00e9rs\u00e9kleti szil\u00e1rds\u00e1gi tulajdons\u00e1gokkal rendelkezik, amelyek t\u00f6k\u00e9letess\u00e9 teszik szivatty\u00fat\u00f6m\u00edt\u00e9sekhez vagy m\u00e1s ig\u00e9nyes, magas h\u0151m\u00e9rs\u00e9klet\u0171 alkalmaz\u00e1sokhoz. A k\u00f6zvetlen\u00fcl szinterezett szil\u00edciumkarbidot \u00e1ltal\u00e1ban olyan szivatty\u00fat\u00f6m\u00edt\u00e9sekhez \u00edrj\u00e1k el\u0151, amelyek kiv\u00e1l\u00f3 magas h\u0151m\u00e9rs\u00e9kleti szil\u00e1rds\u00e1got, valamint kiv\u00e1l\u00f3 magas h\u0151m\u00e9rs\u00e9kleti szil\u00e1rds\u00e1gi teljes\u00edtm\u00e9nyt ig\u00e9nyelnek.<\/p>","protected":false},"excerpt":{"rendered":"
Silicon carbide has an array of applications in industry due to its excellent properties. These include its resistance against corrosion, oxidation and thermal impact. React-bonded SiC is produced through the sintering process by infiltrating liquid silicon into porous green bodies of silicon carbide and infusing it under pressure. The final material has low fracture toughness. […]<\/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-91","post","type-post","status-publish","format-standard","hentry","category-knowledge"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/ceramicatijolart.com\/hu\/wp-json\/wp\/v2\/posts\/91","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ceramicatijolart.com\/hu\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ceramicatijolart.com\/hu\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ceramicatijolart.com\/hu\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ceramicatijolart.com\/hu\/wp-json\/wp\/v2\/comments?post=91"}],"version-history":[{"count":1,"href":"https:\/\/ceramicatijolart.com\/hu\/wp-json\/wp\/v2\/posts\/91\/revisions"}],"predecessor-version":[{"id":92,"href":"https:\/\/ceramicatijolart.com\/hu\/wp-json\/wp\/v2\/posts\/91\/revisions\/92"}],"wp:attachment":[{"href":"https:\/\/ceramicatijolart.com\/hu\/wp-json\/wp\/v2\/media?parent=91"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ceramicatijolart.com\/hu\/wp-json\/wp\/v2\/categories?post=91"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ceramicatijolart.com\/hu\/wp-json\/wp\/v2\/tags?post=91"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}