Karfe-karbaiyd na siliki da aka ha\u0257a da nitraidi ba ya samun kulawa iri \u0257aya da SiC da aka ha\u0257a ta hanyar amsawa ko SiC da aka sinter. Wannan ba matsala. Yana aiki wajen \u0257aukar keken murhu, shimfi\u0257a bangon \u0199wayoyin aluminium, da jure gogayya da bulo da aka ha\u0257a da oksidi ba zai iya jurewa ba. Na shafe isasshen lokaci tare da NSiC \u2014 wanda ake kuma rubuta shi NBSiC ko nitride-bonded SiC \u2014 don in fa\u0257i a fili: ba sigar arha ce ta SiC mai cike ba. Wani kayan ne daban da ke da aiki daban.<\/p>\n
Hanyar yin sa a kan takarda tana da sau\u0199i. Ana \u0257aukar \u0199wayoyin silicon carbide, a \u0199ara \u0199arfen silicon, a yi siffa, sannan a gasa shi a cikin nitrogen. Silicon \u0257in zai koma silicon nitride, kuma wannan nitride \u0257in zai zama man ha\u0257i da ke ri\u0199e \u0199wayoyin SiC tare. Yawanci abubuwan da ake samu suna da kusan kashi 70\u201380% SiC da kashi 20\u201330% Si\u2083N\u2084. Ragowar girma yayin yin nitriding \u0199anana ce, shi ya sa za a iya yin manyan faranti, bulo, da siffofi masu wahala ba tare da matsalar karkacewa kamar yadda ake gani a wasu kayan yumbu ba.<\/p>\n
<\/p>\n
Yawanci \u0199arfin nauyi yana tsakanin 2.6\u20132.8 g\/cm\u00b3. Bu\u0257a\u0257\u0257en ramuka a kan matakan da aka saba amfani da su sau da yawa yana kusan 12\u201317%. Wannan ramuka ne abu na farko da mutane ke kuskure fahimta. Ba lahani ba ne ta atomatik. Shi ne dalilin da ya sa kayan ke iya jure bugun zafi wanda zai fashe abu mai cike gaba \u0257aya, kuma shi ne dalilin da ya sa yake da sau\u0199i fiye da SiC da aka ha\u0257a ta hanyar amsawa a cikin keken murhu. Wasu sabbin nau'uka ana sake gasa su ko ana tsara su don rufe ramukan saman da fatar silica. Wa\u0257annan suna aiki kamar kayan hana wuta da aka rufe fiye da sponj.<\/p>\n
\u0198arfin sa ya fi \u0199asa fiye da na SiSiC mai cunkoso. A yanayin zazzabi na \u0257aki, \u0199imar fashewar (modulus of rupture) na nau'ikan kilin na gama gari da na watsawa na iya kaiwa cikin dubban MPa, ba MPa 250 da ake ji game da sandunan da aka ha\u0257a ta hanyar amsawa ba. Abin amfani shi ne abin da ke faruwa a yanayin zafi. Silicon carbide da aka ha\u0257a da nitride na ri\u0199e \u0199arfin \u0257aukar nauyi sosai sama da matakin da siliki mai 'yanci a cikin reaction bonded SiC ke fara laushi. Ana yawan ambaton aikin a zahiri a tsakanin 1450\u20131600\u00b0C, gwargwadon yanayi, nauyi, da ko ingancin ya kasance \u0199aramin jiki na slip-cast ko bulo mai kauri da aka matsa. Idan ka bi lambar talla ba tare da duba aikin ba, za ka har yanzu lan\u0199wasa faranti.<\/p>\n
Gudun watsawar zafi yana da kyau idan aka kwatanta da cordierite ko mullite, kuma gaba\u0257aya ya fi \u0199asa fiye da RBSiC mai cunkoso. Fa\u0257a\u0257a \u0199an\u0199anta ce. Wannan ha\u0257in, tare da ha\u0257in nitride, shi ne dalilin da ya sa kayan daki ke tsira daga dumama da sanyaya ba tare da samun \u0199aramin tsagewa ba a ranar Talata.<\/p>\n
A ta fuskar sinadarai, yana da \u0199arfi sosai a yawancin yanayin masana'antu. Aluminiyamu mai narkewa da cryolite su ne misali mafi shahara: SiC da aka ha\u0257a da nitride ya zama kayan bango na gefe da aka fi so a cikin \u0199wayoyin rage sinadarai saboda carbon yana \u0199onewa kuma bulo na oxide bai dawwama. Haka kuma, yana jure gogayya, yawancin tarkace, da iskar datti a cikin siklon fiye da bulo na SiC da laka ta ha\u0257a. Ba shi da rai har abada. Alkalai masu \u0199arfi, rashin yin nitridation yadda ya kamata tare da ragowar silicon mai yanci, da rashin kulawa wajen oxidation a fuskar zafi za su ci gaba da lalata shi.<\/p>\n
Kayan ginin murhu kasuwanci ne na kullum. Batts, faranti, setters, sanduna, da sandunan giciye a cikin kayan wanka, kayan tebur, faranti na lantarki, da keramiki na fasaha. Idan aka kwatanta da cordierite, za ka samu zafin jiki mafi girma, \u0257aukar nauyi mafi kyau, sassa masu siriri, da \u0199arancin nauyin maras amfani a cikin murhu. Wannan kalmar \u0199arshe ba wa\u0199a ba ce. Rage nauyin kayan ginin murhu yana nufin samar da kayayyaki da yawa da kuma amfani da \u0199arancin mai a kowane zagaye.<\/p>\n
Aluminiyamu shi ne babban gidan na biyu. Bulo-bulo na bango a layukan tukunyar nika suna bu\u0199atar gudanar da zafi, \u0199arfin injiniya, da juriya ga sinadaran ruwan wanka. NSiC yana yin wannan aikin a farashi da masana'antu za su iya jurewa. Sashin \u0199asan bututun fitar hayaki na tanda mai fashewa, wuraren lalacewa na mayar da sharar zuwa makamashi, da murfin cyclone a hakar ma'adinai ko samar da wutar lantarki suna amfani da wannan ka'ida: \u0199wayoyin SiC masu tauri, ha\u0257i da zai jure zafi, da siffa da za a iya girka a matsayin bulo ko a matsayin sashi da aka zuba.<\/p>\n
Sassan da ke lalacewa da amfani ma suna bayyana \u2014 tayaloli, bututun feshi, sassan famfo \u2014 idan muhalli yana da zafi kuma mai gogayya, amma ba ka bu\u0199atar kusan babu ramuka na reaction bonded SiC. Idan slurry \u0257in sanyi ne kuma abokin gaba \u0257aya shi ne gogayya ta zamewa, layin SiSiC mai cunkoso yawanci yafi \u0257orewa. Idan abokin gaba shi ne zafi tare da gogayya da sauyin zafi, NSiC yana fara bayyana a matsayin za\u0253i mai kyau.<\/p>\n
Silicon carbide da aka ha\u0257a ta hanyar amsa sinadarai (reaction bonded) ya fi cunkoso, \u0199arfi, kuma ha\u0257e sosai. Yana samar da kyawawan sanduna, gungurawa, da sassan sawa masu daidaito a \u0199asa da kimanin 1350\u20131380\u00b0C. A sama da haka, siliki mai 'yanci shi ne mai mulki. NSiC ba shi da wannan tafkin \u0199arfe a cikin \u0199ananan tsarin gine-gine, don haka yana ci gaba da aiki a zafi mafi girma. Hakanan shi ne za\u0253i mai amfani don manyan siffofin da ke jure zafi inda shigar siliki cikin babban bulo ba shine manufar ba.<\/p>\n
SiC da aka sake kristalization yana jure zafi sosai kuma yana kasancewa mai tsabta a wasu yanayin murhu, amma yana da ramuka da yawa kuma galibi ba shi da \u0199arfi. SiC da aka ha\u0257a da oxide ya fi rahusa amma yana rasa \u0199arfin zafi da juriya ga girgiza. SiC da aka sinter shi shi ne \u0257an'uwa mai cunkoso kuma ana \u0199ididdige farashinsa yadda ya dace. NSiC yana cikin rukunin da masana'antu ke bu\u0199atar aikin SiC a manyan yanka ba tare da sayen keramiki na dakin gwaje-gwaje ba.<\/p>\n
Nitriding da bai kammala ba shine mai kashewa a hankali. Bulo na iya bayyana da kyau a waje amma ya \u0253oye ragowar silicon ko tsakiyar da ba ta da \u0199arfi. A cikin sel na aluminium, hakan na haifar da tsatsa da wuri. A farantin murhu, hakan na zama oxidation da ke sa saman ya zama foda kuma ya rage \u0199arfi. Danshi a cikin jiki mai ramuka, sai a yi masa gasa da sauri, wani misali ne na gargajiya. Tururi ba ya damu da jadawalin samarwarku.<\/p>\n
Mutane kuma suna matsa tunani mai yawa game da zafin jiki fiye da kima a kan matakin mai ramuka. NSiC ba bututun rufewa ba ne. Idan iska na iya shiga ciki, lalacewar \u0199arfe ta hanyar iskar oxygen da sinadaran danshi suna da mahimmanci. Kuma idan aikace-aikacen shine slurry mai saurin gudu a zafin jiki mai matsakaici, watakila ka sayi inshorar bugun zafi da ba ka bu\u0199ata.<\/p>\n
Kada ka aika da \u201cSiC brick\u201d ka yi fatan zai yi aiki. Ka kira shi nitride bonded. Ka bayar da kololuwar zafi, yanayi, nauyi, lokacin zagaye, da sinadarai \u2014 wanka na aluminium, tururin alkali, toka mai tashi, zubewar glaze, duk abin da ke ta\u0253a \u0253angaren. Nemi \u0199arfin nauyi, porosity na bayyane, modulus na fashewa a zafi, da siliki mai yanci da ya rage. Don kayan ginin murhu, tambayi ko an yi shi ne ta slip-cast mai \u0199wayoyin \u0199anana ko an matsa shi mai \u0199wayoyin manya. Wa\u0257annan kayayyaki biyu ba sa lalacewa ko watsawa zafi iri \u0257aya.<\/p>\n
Sic da nitride aka ha\u0257a shi ne kayan da kake amfani da shi lokacin da kayan oxide suka gaji, SiC da aka ha\u0257a ta hanyar amsa sinadarai yana da iyaka ga zafin jiki ko kuma yana da tsada sosai a manyan sassa, kuma dole ne masana'anta ta ci gaba da aiki. Ba abin jan hankali bane. Shi ne farantin da ke fitowa daga tanda a daidai, bango na gefe da ba ya lankwasawa, da kuma rufin ciki da ke nan har bayan aikin \u0199arshe. Za\u0253i darajar da ta dace da aikin, kuma za ta kasance haka.<\/p>","protected":false},"excerpt":{"rendered":"
Hotter Than RBSiC, Tougher Than the Old Bricks: A Practical Guide to Nitride Bonded Silicon Carbide Nitride bonded silicon carbide does not get the same attention as reaction bonded SiC or sintered SiC. That is fine. It is busy holding up kiln cars, lining aluminum cells, and taking abrasion that oxide-bonded brick cannot survive. I […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-54","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/nitridebondedsic.com\/ha\/wp-json\/wp\/v2\/posts\/54","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nitridebondedsic.com\/ha\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nitridebondedsic.com\/ha\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nitridebondedsic.com\/ha\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nitridebondedsic.com\/ha\/wp-json\/wp\/v2\/comments?post=54"}],"version-history":[{"count":2,"href":"https:\/\/nitridebondedsic.com\/ha\/wp-json\/wp\/v2\/posts\/54\/revisions"}],"predecessor-version":[{"id":56,"href":"https:\/\/nitridebondedsic.com\/ha\/wp-json\/wp\/v2\/posts\/54\/revisions\/56"}],"wp:attachment":[{"href":"https:\/\/nitridebondedsic.com\/ha\/wp-json\/wp\/v2\/media?parent=54"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nitridebondedsic.com\/ha\/wp-json\/wp\/v2\/categories?post=54"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nitridebondedsic.com\/ha\/wp-json\/wp\/v2\/tags?post=54"}],"curies":[{"name":"\u0199ir\u0199irar rubutu","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}