Ngwakọta na-abụghị ọla mejuru silicon na nitrogen, silicon nitride (Si3N4) bụkwa ihe seramiiki dị elu nwere ngwakọ igwe, ọkụ na ọkụ eletrik kachasị mma. Na mgbakwunye, atụnyere ọtụtụ seramiki ndị ọzọ, ọ bụ seramiiki na-arụ ọrụ dị elu nwere ọnụọgụ mgbasawanye ọkụ dị ala nke na-enye ezigbo nguzogide ujo ọkụ.
Atụmatụ
N'ihi ọnụọgụ mgbasawanye ọkụ ya dị ala, ihe ahụ nwere nguzogide ujo dị oke elu yana ezigbo mgbaji siri ike. Si3N4 workpieces na-eguzogide mmetụta na ujo. Ihe ndị a na-arụ ọrụ nwere ike ịnagide okpomọkụ ọrụ ruru 1400 Celsius C ma na-eguzogide ọgwụ kemịkalụ, mmetụta na-emebi emebi, na ọla a wụrụ awụ dị ka aluminom, yana acids na alkaline ngwọta. Akụkụ ọzọ bụ njupụta ya dị ala. Ọ nwere njupụta dị ala nke 3.2 ruo 3.3 g/cm3, nke fọrọ nke nta ka ọ bụrụ ọkụ dị ka aluminom (2.7 g/cm3), na ọ nwere ike na-ehulata max nke ≥900 MPa.
Na mgbakwunye, Si3N4 bụ ihe e ji mara oke nguzogide iyi yana gafere oke okpomọkụ nke ọtụtụ ọla, dị ka ike okpomọkụ dị elu na nguzogide na-akpụ akpụ. Ọ na-enye ngwakọta dị elu nke nguzogide na-akpụ akpụ na oxidation ma na-eme ka ikike okpomọkụ dị elu nke ọtụtụ ọla. N'ihi na ọ dị obere okpomọkụ conductivity na ike na-eyi na-eguzogide, ọ nwere ike iguzogide ọnọdụ kachasị njọ na ngwa ụlọ ọrụ na-achọsi ike. Ọzọkwa, silicon nitride bụ nnukwu nhọrọ mgbe achọrọ oke okpomọkụ na oke ibu.
Njirimara
● Nnukwu mgbaji siri ike
● Ike mgbanwe dị mma
● Njupụta dị oke ala
● Nguzogide ujo ọkụ na-enweghị atụ
● Ọnọdụ okpomọkụ dị elu na-arụ ọrụ na ikuku oxidizing
Usoro mmepụta
Usoro ise dị iche iche eji eme silicon nitride - na-eduga n'ihe na ngwa ọrụ dịtụ iche.
SRBSN ( silicon nitride na-emeghachi omume)
GPSN (gas mgbali sintered silicon nitride)
HPSN (silicon nitride na-ekpo ọkụ)
HIP-SN ( silicon nitride etinyere na-ekpo ọkụ)
RBSN ( silicon nitride na-emeghachi omume)
N'ime ise ndị a, GPSN bụ usoro mmepụta ihe a na-ejikarị eme ihe.
Ihe atụ ngwa
Bọọlụ na ihe na-atụgharị maka ọkụ
N'ihi nnukwu mgbaji siri ike na njirimara tribological dị mma, ceramik silicon nitride dabara nke ọma maka iji bọọlụ na ihe na-atụgharị maka ọkụ, ezigbo bearings, ngwa seramiiki na-arụ ọrụ dị arọ, yana akụrụngwa ụgbọ ala nwere nrụgide siri ike. Na mgbakwunye, usoro ịgbado ọkụ na-eji ihe 'mgbochi ujo siri ike na nguzogide oke okpomọkụ.
Ngwa dị oke ọkụ
E wezụga nke ahụ, ọ dịla anya a na-arụ ọrụ na ngwa okpomọkụ dị elu. Eziokwu ahụ bụ na ọ bụ otu n'ime ihe seramiiki monolithic ole na ole nwere ike iguzogide oke ọkụ ọkụ na gradients okpomọkụ nke igwe roket hydrogen/oxygen mepụtara.
Ụlọ ọrụ ụgbọ ala
Ugbu a, a na-eji silicon nitride ihe bụ isi na ụlọ ọrụ ụgbọ ala na ngwa maka akụkụ injin na ngwa ngwa injin, dị ka turbochargers maka obere inertia na mbelata injin na ikuku, plọg na-egbuke egbuke maka mmalite ngwa ngwa, valvụ njikwa gas na-abawanye ngwa ngwa, na ogwe aka rocker maka injin gas ka ọ na-eyi.
Ụlọ ọrụ eletrọnịkị
N'ihi ihe ọkụ eletrik ya dị iche iche, na ngwa microelectronics, silicon nitride na-arịwanye elu dị ka ihe mgbochi na mgbochi kemịkalụ na mmepụta nke sekit agbakwunyere maka nkwakọ ngwaahịa dị mma. A na-eji silicon nitride mee ihe dị ka oyi akwa ngafe nwere ihe mgbochi dị elu megide ion sodium na mmiri, nke bụ isi ihe abụọ na-akpata corrosion na enweghị ntụkwasị obi na microelectronics. Na capacitors maka ngwaọrụ analog, a na-ejikwa ihe ahụ dị ka ihe mkpuchi ọkụ n'etiti akwa polysilicon.
Mmechi
Silicon nitride ceramics bụ akụrụngwa bara uru. Ụdị seramiiki ọ bụla nwere atụmatụ pụrụ iche na-eme ka ọ baa uru n'akụkụ dị iche iche. Ịghọta ọtụtụ ụdị ceramics silicon nitride na-eme ka ọ dị mfe ịhọrọ nke kacha mma maka ngwa enyere.
