{"id":716,"date":"2026-10-11T21:20:22","date_gmt":"2026-10-11T13:20:22","guid":{"rendered":"https:\/\/siliconcarbide.net\/?p=716"},"modified":"2026-10-11T21:20:22","modified_gmt":"2026-10-11T13:20:22","slug":"pse-karbidi-i-silicit-i-lidhur-me-nitrid-humb-forcen-pas-8-12-muajsh","status":"publish","type":"post","link":"https:\/\/siliconcarbide.net\/sq\/why-nitride-bonded-silicon-carbide-lose-strength-after-8-12-months\/","title":{"rendered":"Pse karbidi i silicit t\u00eb lidhur me nitrid humbet forc\u00ebn pas 8\u201312 muajsh"},"content":{"rendered":"

Pse karbidi i silicit t\u00eb lidhur me nitrid humbet rezistenc\u00ebn pas 8\u201312 muajsh n\u00eb atmosfera oksiduese<\/strong><\/h1>\n

Kam kaluar dymb\u00ebdhjet\u00eb vjet duke punuar me pajisje me temperatura t\u00eb larta n\u00eb Shanghai dhe n\u00eb impiantet p\u00ebrreth t\u00eb qeramik\u00ebs dhe metalurgjis\u00eb. Nj\u00eb nga problemet m\u00eb t\u00eb vazhdueshme q\u00eb shoh me karbidi silikoni i lidhur me nitrid \u00ebsht\u00eb se raftet, pllakat dhe mbajt\u00ebset e furr\u00ebs duken t\u00eb forta kur futen, por pas disa muajsh sh\u00ebrbimi normal fillojn\u00eb t\u00eb \u00e7ahen ose t\u00eb p\u00ebrkuen n\u00ebn ngarkesa q\u00eb m\u00eb par\u00eb i p\u00ebrballonin pa problem. Shumica e operator\u00ebve supozojn\u00eb se materiali thjesht \u201cu konsumua\u201d ose se cikli i pjekjes ishte tep\u00ebr agresiv. N\u00eb linjat me t\u00eb cilat punoj, shkaku kryesor \u00ebsht\u00eb oksidimi progresiv i faz\u00ebs lidh\u00ebse t\u00eb nitridit sapo sip\u00ebrfaqja ekspozohet ndaj ajrit n\u00eb temperatur\u00eb.<\/p>\n

Karburidi i silicit i lidhur me nitrid bazohet n\u00eb matric\u00ebn e nitridit t\u00eb silicit p\u00ebr t\u00eb mbajtur kokrrat e karburidit t\u00eb silicit s\u00eb bashku dhe p\u00ebr t'i dh\u00ebn\u00eb pjes\u00ebs forc\u00ebn dhe rezistenc\u00ebn ndaj goditjeve termike. N\u00eb nj\u00eb atmosfer\u00eb reduktuese ose neutrale, ky lidh\u00ebs mbetet relativisht i q\u00ebndruesh\u00ebm. Pasi furr\u00eb ose tenxherja funksionon me aj\u00ebr t\u00eb tep\u00ebrt\u2014gj\u00eb e zakonshme n\u00eb pjekjet e nd\u00ebrprera t\u00eb qeramik\u00ebs ose n\u00eb disa cikle trajtimi termik t\u00eb metaleve\u2014oksigjeni sulmon nitridin. Nj\u00eb shtres\u00eb e holl\u00eb e pasur me silic formohet n\u00eb sip\u00ebrfaqe dhe, m\u00eb e r\u00ebnd\u00ebsishmja, n\u00eb kufijt\u00eb e grimcave. Pjesa nuk d\u00ebshton papritmas; ajo gradualisht humb rezistenc\u00ebn ndaj p\u00ebrkuljes dhe b\u00ebhet m\u00eb e ndjeshme ndaj gradient\u00ebve termik\u00eb. Un\u00eb rregullisht shoh pllaka q\u00eb, kur ishin t\u00eb reja, kishin matje shum\u00eb mbi 40 MPa, t\u00eb bien n\u00eb t\u00eb ul\u00ebtat e 20-ave pas 8\u201312 muajsh t\u00eb cikleve ditore midis 1200 \u00b0C dhe temperatur\u00ebs s\u00eb dhom\u00ebs.<\/p>\n

Konsekuenca praktike shfaqet n\u00eb dy m\u00ebnyra. S\u00eb pari, raftet zhvillojn\u00eb \u00e7arje t\u00eb holla q\u00eb fillojn\u00eb n\u00eb skajet ose rreth pikave mb\u00ebshtet\u00ebse dhe pastaj p\u00ebrhapen n\u00ebn pesh\u00ebn e tyre plus ngarkes\u00ebn e mallrave. S\u00eb dyti, kapaciteti efektiv i mbajtjes s\u00eb ngarkes\u00ebs bie edhe para se t\u00eb shfaqen \u00e7arje t\u00eb dukshme, k\u00ebshtu q\u00eb operator\u00ebt ose reduktojn\u00eb numrin e pjes\u00ebve p\u00ebr raft ose pranojn\u00eb norma m\u00eb t\u00eb larta thyerjeje. N\u00eb t\u00eb dyja rastet, fabrika p\u00ebrfundon duke z\u00ebvend\u00ebsuar mobiljet m\u00eb her\u00ebt se sa ishte parashikuar n\u00eb llogaritjen e blerjes fillestare. Fabrikat q\u00eb p\u00ebrdorin furrat me shtyt\u00ebs t\u00eb pand\u00ebrprer\u00eb ose furrat me rrota me kontroll m\u00eb t\u00eb rrept\u00eb t\u00eb atmosfer\u00ebs zakonisht arrijn\u00eb jet\u00ebgjat\u00ebsi m\u00eb t\u00eb gjat\u00eb nga i nj\u00ebjti grad\u00eb; furrat me ngarkesa t\u00eb nd\u00ebrprera, t\u00eb zakonshme n\u00eb rajonin e Shangait, tregojn\u00eb problemin m\u00eb shpejt sepse \u00e7do ftohje lejon q\u00eb ajri i fresk\u00ebt t\u00eb arrij\u00eb n\u00eb sip\u00ebrfaqet e nxehta.<\/p>\n

Ajo q\u00eb n\u00eb t\u00eb v\u00ebrtet\u00eb ngadal\u00ebson degradimin \u00ebsht\u00eb e thjesht\u00eb sapo ta trajtosh faz\u00ebn e lidhjes si faktorin kufizues. Mbaje temperatur\u00ebn maksimale dhe koh\u00ebn n\u00eb temperatur\u00eb sa m\u00eb t\u00eb ul\u00ebta q\u00eb lejon procesi; \u00e7do 50 \u00b0C shtes\u00eb mbi 1350 \u00b0C e p\u00ebrshpejton duksh\u00ebm ritmin e oksidimit q\u00eb un\u00eb mas n\u00eb pjes\u00ebt e kthyera. Kur dizajni i furr\u00ebs e lejon, nj\u00eb pastrim i shkurt\u00ebr ose nj\u00eb atmosfer\u00eb paksa reduktuese gjat\u00eb mbajtjes n\u00eb temperatur\u00eb t\u00eb lart\u00eb ul mjaftuesh\u00ebm presionin e pjessh\u00ebm t\u00eb oksigjenit p\u00ebr t\u00eb zgjatur jet\u00ebn e p\u00ebrdorueshme me disa muaj. Po aq e r\u00ebnd\u00ebsishme \u00ebsht\u00eb edhe ngarkesa mekanike. Nitridi i lidhur me SIC, i mb\u00ebshtetur vet\u00ebm n\u00eb skaje dhe q\u00eb mban ngarkesa t\u00eb r\u00ebnda dhe t\u00eb pabarabarta, zhvillon stres m\u00eb t\u00eb lart\u00eb t\u00eb t\u00ebrheqjes n\u00eb pjes\u00ebn e poshtme; sapo sip\u00ebrfaqja t\u00eb dob\u00ebsohet nga oksidimi, k\u00ebto strese shkaktojn\u00eb \u00e7arje m\u00eb her\u00ebt. Kalimi n\u00eb mb\u00ebshtetje trepik\u00ebshe ose t\u00eb vazhdueshme, ose thjesht reduktimi i ngarkes\u00ebs maksimale p\u00ebr pllak\u00eb me 15\u201320 %, shpesh rikthen intervalin origjinal t\u00eb z\u00ebvend\u00ebsimit pa ndryshuar klas\u00ebn e materialit.<\/p>\n

Un\u00eb gjithashtu kontrolloj pllakat e kthyer p\u00ebr trash\u00ebsin\u00eb e shtres\u00ebs s\u00eb oksiduar. Nj\u00eb film sip\u00ebrfaq\u00ebsor i nj\u00ebtrajtsh\u00ebm gri i hapur me disa qindra mikron \u00ebsht\u00eb normal; shkall\u00eb m\u00eb e trash\u00eb e lokalizuar ose pluhurosje n\u00eb skaje zakonisht tregon ose nj\u00eb pik\u00eb t\u00eb nxeht\u00eb n\u00eb furr\u00eb ose ekspozim t\u00eb zgjatur mbi kufirin e rekomanduar. Fabrikant\u00ebt q\u00eb regjistrojn\u00eb matjet e atmosfer\u00ebs dhe ngarkes\u00ebn maksimale n\u00eb raft, s\u00eb bashku me numrin e cikleve para shfaqjes s\u00eb \u00e7arjeve t\u00eb para, zakonisht mund t\u00eb rrisin jet\u00ebn mesatare nga rreth 10 muaj n\u00eb 14\u201316 muaj n\u00eb t\u00eb nj\u00ebjtin sic t\u00eb lidhur me nitrid. Ata q\u00eb vazhdojn\u00eb t\u00eb p\u00ebrdorin modelin origjinal t\u00eb ngarkes\u00ebs s\u00eb dendur dhe atmosfer\u00ebn plot\u00ebsisht ajrore, thjesht z\u00ebvend\u00ebsojn\u00eb pllakat sipas nj\u00eb orari m\u00eb t\u00eb shkurt\u00ebr dhe m\u00eb t\u00eb shtrenjt\u00eb, dhe vazhdojn\u00eb t\u00eb pyesin veten pse seti i ri nuk zgjat m\u00eb shum\u00eb se ai i fundit.<\/p>\n

Vet\u00eb materiali \u00ebsht\u00eb n\u00eb gjendje t\u00eb ofroj\u00eb nj\u00eb jet\u00ebgjat\u00ebsi t\u00eb gjat\u00eb sh\u00ebrbimi kur faza e lidhjes mbrohet. Dallimi q\u00eb shoh n\u00eb terren pothuajse kurr\u00eb nuk \u00ebsht\u00eb nj\u00eb ndryshim i papritur n\u00eb cil\u00ebsin\u00eb e l\u00ebnd\u00ebs s\u00eb par\u00eb; ai q\u00ebndron n\u00ebse impjanti i trajton oksidimin dhe ngarkes\u00ebn si variabla t\u00eb kontrollueshme apo si kushte sfondi t\u00eb pashmangshme.<\/p>","protected":false},"excerpt":{"rendered":"

Why Nitride Bonded Silicon Carbide Lose Strength After 8\u201312 Months in Oxidizing Atmospheres I\u2019ve spent twelve years dealing with high-temperature equipment around Shanghai and the surrounding ceramics and metallurgy plants. One of the most consistent problems I see with nitride bonded silicon carbide is that the kiln shelves, plates, and setters look solid when they… <\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"off","neve_meta_content_width":70,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","ngg_post_thumbnail":0,"footnotes":""},"categories":[30],"tags":[],"class_list":["post-716","post","type-post","status-publish","format-standard","hentry","category-sic-knowledge"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/siliconcarbide.net\/sq\/wp-json\/wp\/v2\/posts\/716","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/siliconcarbide.net\/sq\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/siliconcarbide.net\/sq\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/siliconcarbide.net\/sq\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/siliconcarbide.net\/sq\/wp-json\/wp\/v2\/comments?post=716"}],"version-history":[{"count":1,"href":"https:\/\/siliconcarbide.net\/sq\/wp-json\/wp\/v2\/posts\/716\/revisions"}],"predecessor-version":[{"id":717,"href":"https:\/\/siliconcarbide.net\/sq\/wp-json\/wp\/v2\/posts\/716\/revisions\/717"}],"wp:attachment":[{"href":"https:\/\/siliconcarbide.net\/sq\/wp-json\/wp\/v2\/media?parent=716"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siliconcarbide.net\/sq\/wp-json\/wp\/v2\/categories?post=716"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siliconcarbide.net\/sq\/wp-json\/wp\/v2\/tags?post=716"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}