T\u00e1 carb\u00e1id shileacain, ar a dtugtar carburandam n\u00edos coitianta, chomh crua le diamant agus an-fhrithsheasmhach in aghaidh caitheamh. Ina theannta sin, mar gheall ar a air\u00edonna ceirmeacha, t\u00e1 s\u00e9 oiri\u00fanach do thimpeallachta\u00ed ardteochta agus do thimpeallachta\u00ed ardvoltais.<\/p>\n
Is \u00e9 toradh t\u00e1irgeadh pr\u00f3iseas Lely p\u00fadar ar f\u00e9idir \u00e9 a ghearradh ina sheoid\u00ed moissanite lena n-\u00fas\u00e1id mar sheoid\u00ed, agus \u00fas\u00e1ideann monar\u00f3ir\u00ed \u00e9 freisin chun earra\u00ed gr\u00e1inn\u00edneacha agus t\u00e1irg\u00ed a \u00e9il\u00edonn cruas a mhonar\u00fa.<\/p>\n
Is comhdh\u00fail an-chrua de sileacan agus de charb\u00f3n \u00e9 an carb\u00e1id sileacain (SiC), ar a dtugtar carborundam freisin \/krbnm\/, a fhoirm\u00edonn go n\u00e1d\u00fartha mar an mianra moissan\u00edte agus a dt\u00e1irgtear go m\u00f3r ar mh\u00f3rsc\u00e1la mar \u00e1bhar scr\u00edobach \u00f3 dheireadh an 19\u00fa haois. Tr\u00ed SiC a cheangal le ch\u00e9ile i gceirmeacha crua n\u00f3 tr\u00ed \u00e9 a dh\u00f3p\u00e1il le n\u00edtrigin, fosfar, beiriliam n\u00f3 al\u00famanam, is f\u00e9idir leathsheolt\u00f3ir\u00ed de chine\u00e1l n n\u00f3 p a chruth\u00fa.<\/p>\n
Is gn\u00e1ch SiC tionscla\u00edoch a th\u00e1irgeadh tr\u00ed Phr\u00f3iseas Acheson, ina nd\u00e9antar gaineamh sileac\u00e1ite a th\u00e9amh le foins\u00ed carb\u00f3in cos\u00fail le c\u00f3ic peitriliam go teochta\u00ed arda i bhfoirn\u00e9is oscailte, as a dtagann gr\u00e1in ghlasa n\u00f3 dhubha ag brath ar a leibh\u00e9al \u00edonachta.<\/p>\n
T\u00e1 c\u00e1il ar SiC as a sh\u00e1r-ind\u00e9antacht theirmeach agus a fhrithsheasmhacht in aghaidh creimthe. Le c\u00f3imheas \u00edseal leathnaithe theirmigh, c\u00f3imheas ard neart\/cruas, cobhsa\u00edocht cheimiceach agus \u00e9asca\u00edocht innealt\u00f3ireachta, feidhm\u00edonn s\u00e9 mar phr\u00edomh-amh\u00e1bhar i go leor feidhmchl\u00e1r tionscla\u00edoch amhail \u00e1bhair mh\u00fascailteacha\/\u00e1bhair ghr\u00e1inn\u00edneacha\/ceirmeacha d'ardghr\u00e1d [16].<\/p>\n
Is \u00e1bhar ceirmeach teicni\u00fail \u00e9 Carb\u00f3nsileacan (SiC) a bhfuil air\u00edonna uath\u00fala aige, lena n-\u00e1ir\u00edtear neamhghn\u00edomha\u00edocht cheimiceach ag gach teocht, friota\u00edocht in aghaidh turraing theirmigh, agus insintertacht ard. \u00das\u00e1idtear SiC i bhfeidhmeanna \u00e9ags\u00fala ceirmeacha teicni\u00fala, lena n-\u00e1ir\u00edtear d\u00e9ant\u00fasa\u00edocht trosc\u00e1in \u00e1ith agus trealaimh l\u00e1imhse\u00e1la sreabh\u00e1n, chomh maith le himthaca\u00ed agus p\u00e1irteanna caitheamh. I measc \u00fas\u00e1id\u00ed breise SiC, t\u00e1 scagair\u00ed c\u00e1ithn\u00edn\u00ed d\u00edosail agus cosaint balist\u00edoch. Cuireann Washington Mills trealamh br\u00faite, meilte agus aicmithe ar f\u00e1il at\u00e1 in ann amh\u00e1bhair a th\u00e1irgeadh a chomhl\u00edonann caighde\u00e1in ANSI, FEPA agus JIS.<\/p>\n
Is f\u00e9idir le p\u00fadair SiC a bheith \u00e9ags\u00fail \u00f3 thaobh m\u00e9id gr\u00e1in de ag brath ar a riocht tosaigh agus ar an bhfoinse charb\u00f3in. Pr\u00f3iseas ullmh\u00fach\u00e1in coitianta le haghaidh sint\u00e9is SiC is ea an laghd\u00fa teirmeach carb\u00f3in; baineann s\u00e9 seo le measc\u00e1n ina bhfuil n\u00edos l\u00fa n\u00e1 200 mech de SiO2 in aghaidh an mhoil agus 1.5-3 mhol d'fhoinse charb\u00f3in a imoibri\u00fa, ansin an tuaslag\u00e1n a fhaightear a shileadh le haig\u00e9ad, a th\u00e9amh agus a imoibri\u00fa chun carb\u00f3n gloine a chosc \u00f3 th\u00e1irgeadh.<\/p>\n
D\u00e9antar p\u00fadair SiC a th\u00e1irgtear tr\u00ed anail\u00eds chainn\u00edocht\u00fail XRD a anail\u00edsi\u00fa a thuilleadh tr\u00ed \u00fas\u00e1id a bhaint as anail\u00eds ar chruth na gc\u00e1ithn\u00edn, ar chumad\u00f3ireacht ghr\u00e1n\u00falach agus ar an dromchla sonrach. I measc na ngn\u00e9ithe t\u00e1bhachtacha t\u00e1 cruth na gc\u00e1ithn\u00edn, an chumad\u00f3ireacht ghr\u00e1n\u00falach agus an dromchla sonrach. De ghn\u00e1th, l\u00e9ir\u00edonn c\u00e1ithn\u00edn\u00ed SiC strucht\u00fair chomhr\u00e9idheacha, splinc\u00edneacha le fo-strucht\u00fair lochtacha a shaintr\u00e9ithr\u00edtear le greill\u00ed d\u00edlsithe ar a dteorainneacha \u2013 gn\u00e9 mh\u00ed-inmhianaithe a d'fh\u00e9adfadh cur isteach go di\u00faltach ar phr\u00f3isis shint\u00e9ireachta.<\/p>\n
Cuireann an carb\u00f3n sileacain go leor saintr\u00e9ithe ar f\u00e1il a fh\u00e1gann gur f\u00e9idir \u00e9 a \u00fas\u00e1id i r\u00e9ims\u00ed tionscla\u00edocha \u00e9ags\u00fala. Go h\u00e1irithe, t\u00e1 s\u00e9 thar a bheith crua, le r\u00e1t\u00e1il chruas Mohs de 9. Ina theannta sin, t\u00e1 an t-\u00e1bhar seo neamhghn\u00edomhach go ceimiceach agus cuireann s\u00e9 friota\u00edocht mh\u00f3r ar chreimeadh ar f\u00e1il, friota\u00edocht teasa suas go teochta\u00ed arda, agus t\u00e1 neart teanntachta maith agus c\u00f3imheas \u00edseal leathnaithe theirmigh aige \u2013 c\u00e1il\u00edochta\u00ed a fh\u00e1gann go bhfuil an carb\u00f3n sileacain oiri\u00fanach do go leor \u00fas\u00e1id\u00ed tionscla\u00edocha.<\/p>\n
B\u00edonn tionchar ollmh\u00f3r ag pr\u00f3isis t\u00e1irgthe carb\u00e1id shileacain ar a chuid air\u00edonna agus \u00fas\u00e1id\u00ed. D'fhorbair Edward Goodrich Acheson pr\u00f3iseas Acheson, a bhaineann le measc\u00e1n de ghaineamh grianchloiche, coke peitriliam agus scealp\u00f3ga adhmaid a th\u00e9amh go teochta\u00ed an-ard chun frithghn\u00edomhartha ceimiceacha a spreagadh a th\u00e1irgeann criostail charb\u00e1ide sileacain \u2013 is f\u00e9idir na criostail seo a bhr\u00fa ansin ina ngal\u00e1n n\u00f3 iad a chaitheamh ina n-ingneoga le d\u00edol.<\/p>\n
\u00das\u00e1idtear an p\u00fadar gr\u00e1inn\u00edneach seo go coitianta ag tionscail an aerfh\u00f3irne agus na ngluaiste\u00e1n le haghaidh snas\u00fa agus lap\u00e1il p\u00e1irteanna chun tois\u00ed beachta agus bailchr\u00edocha m\u00edn a bhaint amach, agus \u00fas\u00e1idtear \u00e9 freisin i gceirmeach, i dt\u00e1irgeadh gloine agus i dt\u00e1irgeadh cruach agus miotal eile. Chruthaigh Alter Technology ciorcad raidi\u00f3 leis an \u00e1bhar seo at\u00e1 in ann seasamh in aghaidh dh\u00e1la\u00ed f\u00edor-dhian na sp\u00e1is.<\/p>\n
Is \u00e1bhar neamh-ocsa\u00edde den scoth \u00e9 ceirmeach carb\u00f3nsileacain le feidhmeanna \u00e9ags\u00fala mar gheall ar a chruas (cruas Mohs > 9), a neamhghn\u00edomha\u00edocht cheimiceach, a cho\u00e9ifeacht \u00edseal leathnaithe theirmigh agus a fhriota\u00edocht ar theas agus ar thionchar araon. Baintear \u00fas\u00e1id as carb\u00f3nsileacain mar chodanna frithchaitheamh in \u00e1bhar scr\u00edobach n\u00f3 mar chodanna frithchaitheamh i gcodanna frithchaitheamh i gceirmeacha teimhneacha, chomh maith le feidhmeanna leathsheolt\u00f3ra agus leictreacha, mar gheall ar a air\u00edonna seoltachta teirmeach.<\/p>\n
Chun SiC a th\u00e1irgeadh, nascann monar\u00f3ir\u00ed sileac\u00e1it aimorfach le carb\u00f3n ar dt\u00fas ag teochta\u00ed arda \u2013 gual-c\u00f3ic mar fhoinse charb\u00f3in de ghn\u00e1th \u2013 sula meiltear go mion \u00e9 agus go measctar le m\u00e9ideanna beaga bauxite \u00e9 chun r\u00e9amhfhoirm a chruth\u00fa. Ansin d\u00e9antar \u00e9 a dhoipithe le haghaidh n\u00edtrigin-dhoipithe (SiC de chine\u00e1l n) n\u00f3 doipithe le b\u00f3r, al\u00famanam, agus galliam (SiC de chine\u00e1l p), ag brath ar an bhfeidhmchl\u00e1r at\u00e1 ag teast\u00e1il.<\/p>\n
Ansin, \u00fas\u00e1ideann monar\u00f3ir\u00ed an r\u00e9amhfhoirm seo chun carb\u00e1id sileacain chi\u00fabach a th\u00e1irgeadh tr\u00ed nascadh tr\u00ed imoibri\u00fa n\u00f3 tr\u00ed leagan s\u00edos gaile ceimiceach. Is \u00e9 nascadh tr\u00ed imoibri\u00fa an cur chuige is coitianta; baineann s\u00e9 seo lena th\u00e9amh go 1410\u00b0C agus lena dhoip\u00edocht le n\u00edtrigin n\u00f3 le b\u00f3r chun SiC de chine\u00e1l n a th\u00e1irgeadh. \u00c9il\u00edonn leagan s\u00edos gaile ceimiceach i bhfad n\u00edos m\u00f3 fuinnimh agus trealaimh d\u00e1 phr\u00f3iseas; \u00e9il\u00edonn nascadh tr\u00ed imoibri\u00fa i bhfad n\u00edos l\u00fa.<\/p>\n
T\u00e1 p\u00fadar SiC de ghr\u00e1d leathsheolt\u00f3ra seoltach deartha chun freastal ar na riachtanais f\u00e1is uath\u00fala a bhaineann le modhanna \u00e9ags\u00fala chun aonchriostail aonair de charb\u00f3n sileacain seoltach de chine\u00e1l n den tr\u00ed\u00fa gl\u00fain a fh\u00e1s. T\u00e1 d\u00e1ileadh m\u00e9ide c\u00e1ithn\u00edn\u00ed optamach ag an gcine\u00e1l seo p\u00fadair le f\u00edorbheag\u00e1n fol\u00fas, agus leibh\u00e9il \u00edonachta t\u00e1irge \u00e1 sol\u00e1thar a sh\u00e1ra\u00edonn 6N.<\/p>","protected":false},"excerpt":{"rendered":"
Conas P\u00fadar Carb\u00e1id Sileacain a Dh\u00e9anamh T\u00e1 carb\u00e1id sileacain, ar a dtugtar carborundam n\u00edos coitianta, chomh crua le diamant agus an-fhrithsheasmhach in aghaidh caitheamh. Ina theannta sin, d\u00e9anann a chuid air\u00edonna ceirmeacha oiri\u00fanach \u00e9 do thimpeallachta\u00ed ardteochta agus do thimpeallachta\u00ed voltais. Is \u00e9 an toradh ar an bpr\u00f3iseas t\u00e1irgthe n\u00e1 p\u00fadar ar f\u00e9idir \u00e9 a ghearradh ina sheoid\u00ed moissanite lena n-\u00fas\u00e1id mar sheoid\u00ed, agus \u2026 L\u00e9igh tuilleadh<\/a><\/p>","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-19","post","type-post","status-publish","format-standard","hentry","category-knowledge"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/siliconcarbidepowders.com\/ga\/wp-json\/wp\/v2\/posts\/19","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/siliconcarbidepowders.com\/ga\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/siliconcarbidepowders.com\/ga\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/siliconcarbidepowders.com\/ga\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/siliconcarbidepowders.com\/ga\/wp-json\/wp\/v2\/comments?post=19"}],"version-history":[{"count":1,"href":"https:\/\/siliconcarbidepowders.com\/ga\/wp-json\/wp\/v2\/posts\/19\/revisions"}],"predecessor-version":[{"id":20,"href":"https:\/\/siliconcarbidepowders.com\/ga\/wp-json\/wp\/v2\/posts\/19\/revisions\/20"}],"wp:attachment":[{"href":"https:\/\/siliconcarbidepowders.com\/ga\/wp-json\/wp\/v2\/media?parent=19"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siliconcarbidepowders.com\/ga\/wp-json\/wp\/v2\/categories?post=19"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siliconcarbidepowders.com\/ga\/wp-json\/wp\/v2\/tags?post=19"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}