Ihe onwunwe

A na-akpọ Silicon carbide (SiC) dị ka carborundum, nke a na-eji ájá quartz, petroleum coke (ma ọ bụ coal coke), ibe osisi (nke ekwesịrị ịgbakwunye mgbe ọ na-emepụta silicon carbide green) na ihe ndị ọzọ. Silicon carbide nwekwara obere ịnweta na okike, mulberry. N'oge a C, N, B na ndị ọzọ na-abụghị oxide elu technology refractory akụrụngwa, silicon carbide bụ otu n'ime ndị kasị ọtụtụ ebe na echekwa ihe, nke nwere ike na-akpọ ọla nchara ájá ma ọ bụ refractory ájá. Ka ọ dị ugbu a, a na-ekewa mmepụta nke silicon carbide na silicon carbide na silicon carbide na-acha akwụkwọ ndụ akwụkwọ ndụ, nke abụọ bụ kristal hexagonal nwere oke 3.20 ~ 3.25 na microhardness nke 2840 ~ 3320kg / m².

A na-ekewa ngwaahịa silicon carbide n'ụdị dị iche iche dabere na mpaghara ngwa dị iche iche. A na-ejikarị ya eme ihe ọzọ. Dịka ọmụmaatụ, silicon carbide bụ ezigbo ihe maka silicon carbide mechanical akara n'ihi ezigbo nguzogide corrosion nke kemịkalụ ya, ike dị elu, isi ike dị elu, nkwụsi ike dị mma, obere ọnụọgụ esemokwu na oke okpomọkụ.

Enwere ike kewaa mgbanaka akara SIC na mgbanaka static, mgbanaka na-akpụ akpụ, mgbanaka dị larịị na ihe ndị ọzọ. Enwere ike ịme silicon silicon ka ọ bụrụ ngwaahịa carbide dị iche iche, dị ka mgbanaka silicon carbide rotary, silicon carbide stationary oche, silicon carbide bushes, na ihe ndị ọzọ, dị ka ihe pụrụ iche chọrọ nke ndị ahịa. A pụkwara iji ya mee ihe na ihe graphite, na ọnụ ọgụgụ esemokwu ya dị ntakịrị karịa alumina seramiiki na alloy siri ike, ya mere enwere ike iji ya na uru PV dị elu, karịsịa na ọnọdụ acid siri ike na alkali siri ike.

Esemokwu mbelata nke SIC bụ otu n'ime uru dị mkpa dị n'iji ya rụọ ọrụ na akara igwe. Ya mere SIC nwere ike iguzogide iyi na ịdọka mma karịa ihe ndị ọzọ, na-agbatị ndụ nke akara. Na mgbakwunye, mbelata esemokwu nke SIC na-ebelata ihe achọrọ maka mmanu mmanu. Enweghị mmanu mmanu na-ebelata ohere nke mmetọ na corrosion, meziwanye arụmọrụ na ntụkwasị obi.

SIC nwekwara nnukwu nguzogide iyi. Nke a na-egosi na ọ nwere ike ịtachi obi n'iji ya eme ihe n'emebighị ma ọ bụ mebie. Nke a na-eme ka ọ bụrụ ihe zuru oke maka ojiji nke na-achọ ọkwa dị elu nke ntụkwasị obi na ịdịte aka.

Enwere ike ịsacha ya ọzọ ma na-egbuke egbuke ka e wee megharịa akara ọtụtụ ugboro n'oge ndụ ya. A na-ejikarị ya eme ihe n'ụzọ dị iche iche, dị ka na nchikota igwe maka ezigbo nguzogide corrosion kemịkalụ, ike dị elu, isi ike dị elu, nkwụsi ike dị mma, obere ọnụọgụ esemokwu na nguzogide okpomọkụ dị elu.

Mgbe ejiri ya maka ihu akara igwe, silicon carbide na-arụpụta arụmọrụ ka mma, ndụ akara na-abawanye, ọnụ ahịa mmezi dị ala, yana ọnụ ala na-agba ọsọ maka ngwa ngbanwe dị ka turbines, compressors, na nfuli centrifugal. Silicon carbide nwere ike inwe ihe dị iche iche dabere n'otú e siri rụọ ya. A na-emepụta mmeghachi omume silicon carbide site na ijikọ ihe ndị dị na silicon carbide na ibe ha na usoro mmeghachi omume.

Usoro a anaghị emetụta ọtụtụ n'ime ihe ndị dị na anụ ahụ na nke okpomọkụ nke ihe ahụ, agbanyeghị na ọ na-amachi nguzogide kemịkalụ nke ihe ahụ. Kemịkalụ a na-ahụkarị bụ nsogbu bụ caustics (na kemịkalụ pH ndị ọzọ dị elu) na acid siri ike, ya mere, a gaghị eji silicon carbide na-emeghachi omume na ngwa ndị a.

Batara mmeghachi omume-sinteredsilicon carbide. N'ime ihe ndị dị otú ahụ, a na-ejupụta pores nke ihe mbụ SIC na usoro nke infiltration site na-ere ọkụ silicon ọla, si otú ahụ SiC nke abụọ na-apụta na ihe ahụ na-enweta ihe ndị pụrụ iche na-arụ ọrụ, na-aghọ ndị na-eguzogide ọgwụ. N'ihi ntakịrị mbelata ya, enwere ike iji ya na-emepụta akụkụ buru ibu ma dị mgbagwoju anya na nso nso. Otú ọ dị, ọdịnaya silicon na-egbochi oke okpomọkụ na-arụ ọrụ na 1,350 Celsius C, nguzogide kemịkalụ na-ejedebekwa ihe dịka pH 10. A naghị atụ aro ihe ahụ maka iji mee ihe na gburugburu alkaline ike.

EjikọtaraA na-enweta silicon carbide site n'inweta granulate SIC mara mma nke ọma na okpomọkụ nke 2000 Celsius iji mepụta njikọ siri ike n'etiti ọka nke ihe ahụ.
Nke mbụ, lattice na-eto eto, mgbe ahụ, porosity na-ebelata, n'ikpeazụkwa, njikọ dị n'etiti mkpụrụ osisi. N'ime usoro nhazi dị otú ahụ, mbelata dị ukwuu nke ngwaahịa na-eme - ihe dịka 20%.
Mgbanaka akara SSIC na-eguzogide ọgwụ niile. Ebe ọ bụ na ọ dịghị silicon ọla dị na nhazi ya, enwere ike iji ya na okpomọkụ ruo 1600C na-emetụtaghị ike ya.