silicon carbide mmeghachi omume-sintered bụ ihe dị mkpa dị elu okpomọkụ ihe, na elu ike, elu ike ike, elu eyi na-eguzogide, elu corrosion na-eguzogide na elu ọxịdashọn na-eguzogide na ndị ọzọ magburu onwe Njirimara, na-ọtụtụ ebe na igwe, aerospace, chemical ụlọ ọrụ, ike na ndị ọzọ. ubi.
1. Nkwadebe ihe onwunwe
Nkwadebe nke reactive sintering silicon carbide akụrụngwa bụ tumadi carbon na silicon ntụ ntụ, nke carbon nwere ike iji dị iche iche nke carbon nwere ihe dị ka coke, graphite, unyi, wdg, silicon ntụ ntụ na-emekarị na-ahọrọ na urughuru. nha nke 1-5μm ntụ ntụ silicon dị ọcha. Nke mbụ, a na-agwakọta ntụ ntụ carbon na silicon n'otu akụkụ, na-agbakwunye ọnụọgụ kwesịrị ekwesị nke ihe nkedo na ihe na-asọpụta, ma na-akpali akpali. Mgbe ahụ, a na-etinye ngwakọta ahụ n'ime igwe ihe igwe maka bọọlụ ka ọ na-agwakọta otu ma na-egweri ruo mgbe nha ya na-erughị 1μm.
2. Usoro ịkpụzi
Usoro ịkpụzi bụ otu n'ime isi nzọụkwụ na silicon carbide n'ichepụta. Usoro ịkpụzi a na-ejikarị bụ ịpị ịkpụzi, ịkpụzi grouting na ịkpụzi static. Ịkpụpụta ịpị pụtara na a na-etinye ngwakọta ahụ n'ime ihe ebu ma kpụrụ ya site na nrụgide igwe. Ịkpụzi ịkpụzi na-ezo aka na ịgwakọta ngwakọta na mmiri ma ọ bụ ihe mgbaze organic, na-agbanye ya n'ime ihe ebu site na sirinji n'okpuru ọnọdụ agụụ, na ịmepụta ngwaahịa emechara ka ọ guzoro. Ịkpụzi nrụgide kwụ ọtọ na-ezo aka na ngwakọta n'ime ebu, n'okpuru nchebe nke agụụ ma ọ bụ ikuku maka ịkpụzi nrụgide static, na-emekarị na nrụgide 20-30MPa.
3. Usoro mmechi
Sintering bụ isi nzọụkwụ na n'ichepụta usoro nke mmeghachi omume-sintered silicon carbide. Igwe ọkụ na-ekpo ọkụ, oge nkwụsịtụ, ikuku ikuku na ihe ndị ọzọ ga-emetụta arụmọrụ nke silicon carbide mmeghachi omume. N'ozuzu, okpomọkụ sintering nke reactive sintering silicon carbide bụ n'etiti 2000-2400 ℃, sintering oge bụ n'ozuzu 1-3 awa, na sintering ikuku na-emekarị inert, dị ka argon, nitrogen, na na. N'oge sintering, ngwakọta ga-enweta mmeghachi omume kemịkalụ iji mepụta kristal silicon carbide. N'otu oge ahụ, carbon ga-emeghachi omume na gas na ikuku iji mepụta gas dị ka CO na CO2, nke ga-emetụta njupụta na ihe onwunwe nke silicon carbide. Ya mere, ịnọgide na-enwe ikuku ikuku kwesịrị ekwesị na oge nkwụsịtụ dị ezigbo mkpa maka ịmepụta silicon carbide mmeghachi omume.
4. Usoro ọgwụgwọ mgbe e mesịrị
silicon carbide mmeghachi omume na-achọ usoro ọgwụgwọ mgbe emechara ya. Usoro ọgwụgwọ ndị a na-ahụkarị bụ machining, egweri, polishing, oxidation na ndị ọzọ. Emebere usoro ndị a iji melite nkenke na ogo elu nke silicon carbide na-emeghachi omume. N'ime ha, egweri na polishing usoro bụ a na-emekarị nhazi usoro, nke nwere ike imezi njedebe na flatness nke silicon carbide elu. Usoro oxidation nwere ike ịmepụta oyi akwa oxide iji welie nguzogide oxidation na nkwụsi ike kemịkalụ nke silicon carbide mmeghachi omume-sintered.
Na nkenke, nrụpụta silicon carbide reactive sintering bụ usoro dị mgbagwoju anya, ọ dị mkpa ịmara ụdị teknụzụ na usoro dị iche iche, gụnyere nkwadebe akụrụngwa, usoro ịkpụzi, usoro ịgbanye na usoro ọgwụgwọ mgbe ọ gasịrị. Naanị site n'ịghọta teknụzụ na usoro ndị a nke ọma nwere ike imepụta ihe silicon carbide mmeghachi omume dị elu iji gboo mkpa mpaghara ngwa dị iche iche.
Oge nzipu: Jul-06-2023