Dị ka akụkụ dị mkpa nke ihe injinịa na ihe arụ ọrụ, ihe seramiiki dị elu nwere atụmanya ngwa ngwa na ume ọhụrụ, ngwa elektrọnịk nzikọrịta ozi, semiconductor, ikuku ikuku na mpaghara mmepụta ihe ndị ọzọ. Otú ọ dị, n'ihi na seramiiki ntụ ntụ bụ nke ukwuu ionic bond ma ọ bụ covalent bond compound, omenala sintering usoro iji kwadebe ok.ihe seramiikina-achọ elu sintering okpomọkụ na ogologo ejide oge, nke na-apụghị izere ezere na-eduga ná ọka coarsening na porosity fọdụrụnụ, na mgbe ahụ na-emetụta Njirimara nke.seramiiki injection ịkpụzi. Iji belataígwè sinteringokpomọkụ, na-ebelata oge nkwụsịtụ, melite njupụta njupụta na ihe onwunwe, ndị nchọpụta emepụtawo nkà na ụzụ ọhụrụ dị iche iche.
Spark plasma sintering (SPS)
Nkà na ụzụ SPS bụ ụdị nkà na ụzụ ọsịsọ n'ike n'ike nke emetụtala ma mụọ na ụwa agụmakwụkwọ. FIG. 1 na-egosi ụkpụrụ ọrụ ya.
Teknụzụ SPS sụrụ ụzọ iwebata dc pulse current n'imeusoro ịgbakọ. Ihe ntinye aka na-arụ ọrụ dị ka onye na-ebu ugbu a ka ọ na-agafe mgbe ọ na-etinye nrụgide na ihe. N'adịghị ka usoro ịmegharị ihe ọdịnala, nke na-ejikarị ọkụ ọkụ nke ahụ kpo oku, SPS na-eji mmetụta ọkụ nke nnukwu ọkụ eletrik na-agafe na ebu ma ọ bụ na-eduzi sample iji kpoo ihe ahụ ọkụ. Maka ihe atụ mkpuchi mkpuchi, a na-ejikarị graphite nwere ezigbo ọkụ eletrik dị ka ihe ọkpụkpụ, a na-ejikwa okpomọkụ na-eguzogide ọgwụ na-eme ka nlele ahụ na-ebili ngwa ngwa. N'ihi na conductive samples, ihe mkpuchi ebu nwere ike iji kpoo a ugbu a ozugbo site sample. The kpo oku ọnụego nwere ike iru 1000 ℃ / min. Mgbe ihe nlele ahụ ruru uru a na-etinye, enwere ike ịmechaa sintering mgbe obere oge nke nchekwa okpomọkụ gasịrị.
Nkà na ụzụ SPS nwere uru dị n'obere okpomọkụ dị ala, oge njide dị mkpirikpi, ọnụego ọkụ ọkụ ngwa ngwa, nrụgide siri ike na-agbanwe agbanwe, na njikọ multi-field (electric-mechanical-thermal).
Ngwa ngwa ngwa (FS)
Ebu ụzọ kọwaa teknụzụ FS na 2010 site na Cologna et al sitere na Mahadum Colorado, dabere na nyocha nke teknụzụ na-enyere aka metal powder sintering technology (FAST)
FS technology tumadi na-agụnye atọ usoro parameters, ya bụ ọkụ ọkụ (Tf), ubi ike (E) na ugbu a (J). Ọgụgụ 3C na-egosi mgbanwe mgbanwe nke oke ọ bụla na usoro FS ọdịnala. Na ọnọdụ a, a na-etinye ọkụ eletrik na-adịgide adịgide na ihe onwunwe na ọkụ ọkụ na-ebili na ọnụ ọgụgụ mgbe niile. Mgbe ọkụ ọkụ dị ala, ihe mgbochi ihe dị elu na nke ugbu a na-agafe na ihe dị ntakịrị. Site na mmụba nke okpomọkụ ọkụ ọkụ, ihe nlele resistivity na-ebelata ma ugbu a na-abawanye nwayọọ nwayọọ. Nke a ogbo ka a na-akpọ incubation ogbo na sistemụ na-achịkwa voltaji. Mgbe ọkụ ọkụ na-ebili na okpomọkụ dị oke egwu, ihe mgbochi ihe na-adaba na mberede, ugbu a na-ebili nke ọma, na FS na-eme. Ebe ọ bụ na ike ubi ka na-akwụsi ike n'oge a, ike usoro (W = EJ) ga-eru ngwa ngwa ike nke ike ọkụ, na usoro ahụ ga-agbanwe site na njikwa voltaji na njikwa ugbu a, nke a na-akpọ FS ogbo. Mgbe resistivity nke ihe anaghị ebili, ike ubi na-emeziwanye ọzọ, sintering na-abanyekwa n'ọnọdụ kwụsiri ike, ya bụ, mkpuchi mkpuchi nke FS. Mgbe ọkwa mkpuchi ahụ gasịrị, usoro FS zuru ezu na-agwụ.
N'iji ya tụnyere omenala omenala, FS nwere uru ndị a: belata oge nkwụsịtụ ma belata ọkụ ọkụ ọkụ chọrọ maka ịmị mkpụrụ, na-egbochi uto ọka, nwere ike nweta ihe na-abụghị nha nha, ngwa dị mfe, ọnụ ala.
Oge nzipu: Jun-07-2022