Silicon nitride yog grey ceramic nrog lub siab tawg toughness, zoo heev thaum tshav kub kub poob tsis kam, thiab kuj impenetrable zog rau molten hlau.
Siv cov yam ntxwv no, nws yog siv rau hauv combustion engine qhov chaw xws li tsheb cav qhov chaw, vuam tshuab blowpipe nozzles, thiab lwm yam., tshwj xeeb tshaj yog qhov chaw uas yuav tsum tau siv nyob rau hauv hnyav ib puag ncig xws li overheating.
Nrog nws cov hnav tsis kam thiab siab txhua yam muaj zog, nws cov ntawv thov hauv cov kabmob cov menyuam qhov chaw, rotating ncej bearings thiab cov khoom siv semiconductor ntau lawm cov khoom seem txuas ntxiv.
Cov khoom ntawm silicon nitride ceramics
1, muaj lub zog loj hauv qhov kub thiab txias;
2, siab tawg toughness;
3, zoo dabtsi yog khoov zog;
4, tsis kam mus rau txhua yam qaug zog thiab creep;
5, lub teeb - tsawg ntom;
6, siab hardness thiab hnav tsis kam;
7, zoo heev thermal shock kuj;
8, tsis tshua muaj thermal expansion;
9, hluav taws xob rwb thaiv tsev;
10, zoo oxidation tsis kam;
11, zoo tshuaj corrosion kuj.
Silicon nitride ceramics muaj tsawg thermal expansion coefficient thiab siab thermal conductivity, yog li ntawd lawv muaj zoo heev kub poob siab kuj. Cov kub nias sintered silicon nitride yuav tsis tawg tom qab tau rhuab mus rau 1000 ℃ thiab muab tso rau hauv dej txias. Thaum tsis kub dhau, silicon nitride muaj lub zog siab thiab cuam tshuam, tab sis siab dua 1200 ℃ yuav raug puas ntsoog nrog kev loj hlob ntawm lub sijhawm siv, kom nws lub zog txo qis, ua rau qaug zog ntau dua 1450 ℃, yog li kev siv ntawm Si3N4 kub feem ntau tsis tshaj 1300 ℃.
Yog li ntawd, silicon nitride tau dav siv hauv:
1. Rotating pob thiab cov menyuam bearings;
2. Cav Cheebtsam: valve, rocker caj npab ncoo, sealing nto;
3. Induction cua sov coil bracket;
4. Turbine hniav, hniav, thoob;
5. Vuam thiab brazing fixtures;
6. Cua sov caij sib dhos;
7. Vuam positioner;
8. Precision shafts thiab lub tes tsho nyob rau hauv high-wear ib puag ncig;
9. Thermocouple sheath thiab raj;
10. Cov txheej txheem semiconductor khoom siv.
