NBSiC sa m\u00f4\u017ee pochv\u00e1li\u0165 vysokou nosnos\u0165ou pri zv\u00fd\u0161en\u00fdch teplot\u00e1ch, ako aj odolnos\u0165ou vo\u010di kyselin\u00e1m, roztaven\u00fdm soliam a halog\u00e9nom. Okrem toho sa tento v\u00fdrobok s n\u00edzkou hmotnos\u0165ou d\u00e1 tvarova\u0165 do zlo\u017eit\u00fdch tvarov, aby r\u00f4znymi sp\u00f4sobmi nahradil kovov\u00e9 diely.<\/p>\n
Materi\u00e1l sa vyzna\u010duje vynikaj\u00facou odolnos\u0165ou proti krehk\u00e9mu praskaniu a n\u00e1razov\u00e9mu opotrebovaniu. Okrem toho m\u00e1 guma lep\u0161iu odolnos\u0165 proti abraz\u00edvnemu opotrebovaniu ako oce\u013e v ka\u017edom type p\u00f4dy.<\/p>\n
Keramika NBSiC pon\u00faka vynikaj\u00facu mechanick\u00fa pevnos\u0165 pre aplik\u00e1cie v abraz\u00edvnom prostred\u00ed, ako aj chemick\u00fa inertnos\u0165 a odolnos\u0165 vo\u010di kyselin\u00e1m. Okrem toho m\u00e1 tento \u017eiaruvzdorn\u00fd materi\u00e1l vynikaj\u00facu tepeln\u00fa stabilitu, \u010do znamen\u00e1, \u017ee odol\u00e1va vysok\u00fdm teplot\u00e1m bez toho, aby praskal alebo degradoval, tak\u017ee je vhodn\u00fd na ochranu termo\u010dl\u00e1nkov pred drsn\u00fdm prostred\u00edm alebo na vytv\u00e1ranie v\u00fdmuroviek pec\u00ed.<\/p>\n
Pevnos\u0165 je dan\u00e1 rozlo\u017een\u00edm ve\u013ekosti z\u0155n a pr\u00edtomnos\u0165ou \u010dast\u00edc nitridu krem\u00edka medzi zrnami karbidu krem\u00edka. Tribologick\u00e1 odolnos\u0165 proti opotrebovaniu kles\u00e1 s rast\u00facou ve\u013ekos\u0165ou z\u0155n. V pr\u00edpade NBSiC vytv\u00e1ra nitrid krem\u00edka medzi ve\u013ek\u00fdmi zrnami jemn\u00e9 p\u00f3rov\u00e9 \u0161trukt\u00fary, ktor\u00e9 umo\u017e\u0148uj\u00fa v\u00fdstu\u017enej f\u00e1ze op\u00e4tovne atakova\u0165 obrusovan\u00e9 povrchy a zni\u017eova\u0165 za\u0165a\u017eenie jednotliv\u00fdch z\u0155n.<\/p>\n
NBSiC sa d\u00e1 formova\u0165 do zlo\u017eit\u00fdch tvarov pomocou Blaschovho procesu na pou\u017eitie v \u017eiaruvzdorn\u00fdch aplik\u00e1ci\u00e1ch, preto\u017ee sa \u013eahko formuje. Pri tvarovan\u00ed do komponentov m\u00e1 presnos\u0165 a\u017e nieko\u013eko mikr\u00f3nov. Okrem toho NBSiC vykazuje v\u00fdnimo\u010dn\u00fa odolnos\u0165 proti opotrebovaniu pri extr\u00e9mnych teplot\u00e1ch, ako aj proti opotrebovaniu \u010dasticami p\u00f4dy, pri\u010dom prekon\u00e1va dokonca aj \u0161peci\u00e1lne ocele ur\u010den\u00e9 \u0161peci\u00e1lne na pr\u00e1cu s p\u00f4dou, pri\u010dom pri sk\u00fa\u0161kach opotrebovania vykazuje dev\u00e4\u0165kr\u00e1t men\u0161iu intenzitu opotrebovania v podmienkach stredne \u0165a\u017ekej p\u00f4dy a a\u017e 1,2-kr\u00e1t men\u0161iu intenzitu opotrebovania v podmienkach \u0165a\u017ekej p\u00f4dy, ako uk\u00e1zali sk\u00fa\u0161ky ocele.<\/p>\n
Karbid krem\u00edka viazan\u00fd nitridom je modern\u00fd \u017eiaruvzdorn\u00fd materi\u00e1l s vynikaj\u00facou h\u00fa\u017eevnatos\u0165ou, odolnos\u0165ou proti oderu a pevnostn\u00fdmi vlastnos\u0165ami. Dok\u00e1\u017ee odol\u00e1va\u0165 extr\u00e9mnym teplot\u00e1m, pri\u010dom zost\u00e1va mimoriadne stabiln\u00fd s obmedzenou r\u00fdchlos\u0165ou line\u00e1rnej expanzie a kontrakcie, ako aj s vlastnos\u0165ami odolnosti vo\u010di tepeln\u00fdm \u0161okom. Karbid krem\u00edka viazan\u00fd nitridom mo\u017eno \u010dasto vidie\u0165 v \u017eeleziarskych vysok\u00fdch peciach (najm\u00e4 v spodn\u00fdch \u010dastiach kom\u00edna, brucha a b\u00f4\u0161i), v aplik\u00e1ci\u00e1ch na v\u00fdrobu keramiky, ako aj na in\u00e9 priemyseln\u00e9 \u00fa\u010dely.<\/p>\n
Karbid krem\u00edka (SiC drvina a kovov\u00fd krem\u00edkov\u00fd pr\u00e1\u0161ok) sa vyr\u00e1baj\u00fa procesom nitrid\u00e1cie, pri\u010dom sa mie\u0161aj\u00fa a vypa\u013euj\u00fa pri vysok\u00fdch teplot\u00e1ch v prostred\u00ed bohatom na dus\u00edk, aby sa vytvorili reak\u010dne spojen\u00e9 zrn\u00e1 karbidu krem\u00edka do hust\u00fdch keramick\u00fdch materi\u00e1lov so siln\u00fdmi v\u00e4zbami podobn\u00fdmi oceli pou\u017e\u00edvanej na v\u00fdrobu keramiky.<\/p>\n
\u0160t\u00fadie karbidu krem\u00edka s nitridovou v\u00e4zbou preuk\u00e1zali jeho vy\u0161\u0161iu \u00fa\u010dinnos\u0165 pri zni\u017eovan\u00ed abraz\u00edvneho opotrebenia ako pri oceli v r\u00f4znych p\u00f4dnych podmienkach, ke\u010f sa porovn\u00e1val s jeho v\u00fdkonom vo\u010di oceli, b\u00f3rovej oceli a C+ Cr + Nb v\u00fdpl\u0148ov\u00e9mu zvaru v r\u00f4znych aplik\u00e1ci\u00e1ch. Okrem toho sa zistilo, \u017ee distrib\u00facia ve\u013ekosti z\u0155n priamo ovplyv\u0148uje jeho odolnos\u0165 proti opotrebovaniu a odolnos\u0165 tohto materi\u00e1lu proti opotrebovaniu.<\/p>\n
So zmen\u0161uj\u00facou sa ve\u013ekos\u0165ou z\u0155n karbidu krem\u00edka viazan\u00e9ho nitridom sa zvy\u0161uje jeho odolnos\u0165 proti opotrebovaniu a st\u00e1va sa ide\u00e1lnym materi\u00e1lom na v\u00fdrobu s\u00fa\u010diastok na spracovanie zeminy.<\/p>\n
Karbid krem\u00edka viazan\u00fd nitridom vykazuje vynikaj\u00facu stabilitu, mechanick\u00fa pevnos\u0165 a lomov\u00fa h\u00fa\u017eevnatos\u0165 pri teplot\u00e1ch vy\u0161\u0161\u00edch ako 1375 \u00b0C (teplota topenia krem\u00edka). Spolo\u010dnos\u0165 Silcarb pou\u017e\u00edva na v\u00fdrobu keramiky NBSIC pokro\u010dil\u00fd v\u00fdrobn\u00fd proces naz\u00fdvan\u00fd odlievanie\/lisovanie s n\u00e1sledn\u00fdm vyp\u00e1len\u00edm v prostred\u00ed s kontrolovan\u00fdm obsahom kysl\u00edka, aby sa dosiahla maxim\u00e1lna mo\u017en\u00e1 prev\u00e1dzkov\u00e1 teplota. Karbid krem\u00edka viazan\u00fd nitridmi nach\u00e1dza viacero priemyseln\u00fdch vyu\u017eit\u00ed vr\u00e1tane bo\u010dn\u00fdch stien n\u00e1bytku pec\u00ed na tavenie hlin\u00edka alebo spodn\u00fdch kom\u00ednov vo vysok\u00fdch peciach.<\/p>\n
Tento materi\u00e1l pon\u00faka vynikaj\u00facu odolnos\u0165 proti kor\u00f3zii v r\u00f4znych prostrediach, od such\u00e9ho vzduchu a\u017e po roztaven\u00e9 soli a kovy, ako aj v zlo\u017eit\u00fdch prostrediach, ako je uho\u013en\u00fd popol a trosky. Karbid krem\u00edka s nitridovou v\u00e4zbou by dokonca mohol v ur\u010dit\u00fdch pr\u00edpadoch nahradi\u0165 oce\u013e ako vhodn\u00fa vo\u013ebu.<\/p>\n
Karbid krem\u00edka viazan\u00fd nitridom pon\u00faka p\u00f4sobiv\u00fa odolnos\u0165 proti opotrebovaniu v abraz\u00edvnych podmienkach p\u00f4dy. \u0160t\u00fadie preuk\u00e1zali, \u017ee je a\u017e dev\u00e4\u0165kr\u00e1t odolnej\u0161\u00ed ako \u0161peci\u00e1lne ocele pou\u017e\u00edvan\u00e9 na obr\u00e1banie p\u00f4dy a viac ako dvakr\u00e1t odolnej\u0161\u00ed ako oce\u013e obsahuj\u00faca b\u00f3r, ktor\u00e1 sa pou\u017e\u00edva ako v\u00fdpl\u0148ov\u00fd zvar na oce\u013e 38GSA. V\u00fdkonnos\u0165 v \u013eahk\u00fdch p\u00f4dnych podmienkach \u010dasto prevy\u0161ovala stredne \u0165a\u017ek\u00e9 a \u0165a\u017ek\u00e9 podmienky; obzvl\u00e1\u0161\u0165 v\u00fdhodn\u00e9 s\u00fa \u013eahk\u00e9 oproti stredne \u0165a\u017ek\u00fdm podmienkam.<\/p>\n
Karbid krem\u00edka viazan\u00fd nitridom sa \u010dasto pou\u017e\u00edva v aplik\u00e1ci\u00e1ch, ktor\u00e9 vy\u017eaduj\u00fa pevnos\u0165, h\u00fa\u017eevnatos\u0165 a tepeln\u00fa stabilitu. Tento materi\u00e1l sa \u010dasto vyskytuje v opotrebovan\u00fdch dieloch, lo\u017eisk\u00e1ch a d\u00fdzach na \u00fa\u010dely odolnosti proti opotrebovaniu; okrem toho sa \u010dasto pou\u017e\u00edva v leteckom a automobilovom priemysle vr\u00e1tane komponentov plynov\u00fdch turb\u00edn, \u010dast\u00ed motorov a v\u00fdmenn\u00edkov tepla v\u010faka jeho vynikaj\u00facim vlastnostiam pri vysok\u00fdch teplot\u00e1ch.<\/p>\n
Nitrid v spojovacej f\u00e1ze poskytuje ochranu pred kor\u00f3ziou hor\u00facimi plynmi, roztaven\u00fdmi so\u013eami a kovmi. Materi\u00e1ly \u010dasto dost\u00e1vaj\u00fa dodato\u010dn\u00fa vrstvu oxidu kremi\u010dit\u00e9ho, aby sa \u010falej zv\u00fd\u0161ila ich odolnos\u0165 proti kor\u00f3zii, pri\u010dom karbid krem\u00edka chr\u00e1ni pred er\u00f3ziou a z\u00e1rove\u0148 zlep\u0161uje celkov\u00fa odolnos\u0165 proti kor\u00f3zii. Nitrid tie\u017e prispieva k odolnosti vo\u010di tepeln\u00fdm \u0161okom, tak\u017ee sa m\u00f4\u017eu \u00fa\u010dinne pou\u017e\u00edva\u0165 pri aplik\u00e1ci\u00e1ch, ktor\u00e9 zah\u0155\u0148aj\u00fa r\u00fdchle zmeny teploty.<\/p>\n
\u017diaromateri\u00e1ly z karbidu krem\u00edka viazan\u00e9ho dus\u00edkom (NBC) sa \u010dasto pou\u017e\u00edvaj\u00fa v n\u00e1ro\u010dn\u00fdch prev\u00e1dzkov\u00fdch podmienkach ako n\u00e1hrada zliatin a in\u00fdch foriem \u017eiaruvzdorn\u00fdch materi\u00e1lov, napr\u00edklad legovan\u00fdch materi\u00e1lov. Medzi be\u017en\u00e9 pr\u00edklady patria cykl\u00f3nov\u00e9 vlo\u017eky pre z\u00e1vody na spracovanie miner\u00e1lov, ako aj s\u00fa\u010dasti \u010derpadiel, oblo\u017eenia ventilov, hrdiel a d\u00fdz vyroben\u00e9 z liatych \u017eiaruvzdorn\u00fdch materi\u00e1lov obsahuj\u00facich NBC.<\/p>\n
Dus\u00edkom viazan\u00e9 tehly z karbidu krem\u00edka maj\u00fa po\u010detn\u00e9 uplatnenie v oceliarskych a ne\u017eelezn\u00fdch metalurgick\u00fdch peciach na pou\u017eitie ako bo\u010dn\u00e9 steny a spodn\u00e9 kom\u00edny hlin\u00edkov\u00fdch taviacich kotlov, vysok\u00fdch pec\u00ed, n\u00e1bytku pec\u00ed a vysok\u00fdch pec\u00ed. K ich vlastnostiam patr\u00ed vynikaj\u00faca odolnos\u0165 proti n\u00e1razu, mo\u017enos\u0165 jednoduch\u00e9ho tvarovania do zlo\u017eit\u00fdch tvarov a v\u00fdnimo\u010dn\u00e1 odolnos\u0165 proti oderu.<\/p>","protected":false},"excerpt":{"rendered":"
NBSiC boasts high load carrying capacities at elevated temperatures, as well as being resistant to acids, molten salts and halogens. Furthermore, this low mass product can be formed into complex shapes to replace metal parts in various ways. Material features excellent resistance to brittle cracking and impact wear. Furthermore, rubber has superior abrasive wear resistance […]<\/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-108","post","type-post","status-publish","format-standard","hentry","category-knowledge"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/posts\/108","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=108"}],"version-history":[{"count":1,"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/posts\/108\/revisions"}],"predecessor-version":[{"id":109,"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/posts\/108\/revisions\/109"}],"wp:attachment":[{"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/media?parent=108"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/categories?post=108"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/tags?post=108"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}