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Silicon nitride ceramic nrog zoo heev lub cev, tshuaj, thiab txhua yam khoom
Silicon nitride ceramics muaj qhov zoo tshaj plaws: tsis tshua muaj ntom, kub tsis kam, nws tus kheej lubrication, corrosion kuj. Dense Si3N4ceramics kuj tseem muaj cov khoom tawg yooj yim, siab modulus zog thiab nws tus kheej lubricity, uas tuaj yeem ua tau zoo heev rau ntau yam hnav thiab tiv taus qhov hnyav hnyav uas tuaj yeem ua rau lwm cov ntaub ntawv ceramic tawg, deform lossis tawg, nrog rau qhov kub thiab txias, qhov kub thiab txias sib txawv, thiab ultra-high nqus tsev vacuum.
Daim ntawv thov tseem ceeb ntawm Silicon Nitride Ceramics
Mechanical Engineering: Silicon nitride ceramics muaj siab hardness, zoo heev hnav tsis kam thiab corrosion kuj, thiab yog dav siv nyob rau hauv mechanical engineering teb. Nws tuaj yeem siv los tsim cov khoom xws li cov kabmob, cov ntsaws ruaj ruaj, cov cuab yeej txiav thiab cov nozzles ntawm qhov kub thiab txias, muab kev ua haujlwm zoo thiab lub neej ntev.
Automotive kev lag luam: Vim tias qhov kub thiab txias ruaj khov thiab hnav tsis kam ntawm silicon nitride ceramics, nws yog siv los tsim cov khoom siv hauv tsheb. Silicon nitride ceramics tuaj yeem siv los ua cov khoom siv ua haujlwm siab xws li piston rings, lub tog raj kheej liners thiab li qub, pab txhim kho roj efficiency thiab txo cov emissions.
Aerospace: Lub teeb yuag, siab zog thiab kub tsis kam ntawm silicon nitride ceramics ua rau lawv cov ntaub ntawv zoo tagnrho rau kev siv aerospace. Nws tuaj yeem siv los tsim cov khoom tseem ceeb xws li cov khoom siv cav, cov hniav turbine, cov khoom siv thermal rho tawm thiab kev tiv thaiv lub dav hlau kom ua tau raws li qhov yuav tsum tau muaj ntawm qhov kub thiab txias, kev kub siab thiab huab cua puag ncig.
Kev lag luam tshuaj: Silicon nitride ceramics tau dav siv hauv kev lag luam tshuaj vim lawv cov tshuaj lom neeg zoo heev thiab kev tiv thaiv corrosion. Silicon nitride ceramics tuaj yeem siv los tsim cov tshuaj tiv thaiv cov hlab ntsha, catalyst carriers, acid thiab alkali resistant khoom thiab kav, thiab tuaj yeem tiv taus corrosive media thiab kub kub.
Optoelectronics: Silicon nitride ceramics muaj cov khoom siv kho qhov muag thiab hluav taws xob zoo heev, yog li lawv muaj cov ntawv thov tseem ceeb hauv kev lag luam optoelectronics. Nws tuaj yeem siv los tsim cov khoom kub thiab lub zog siab fiber ntau amplifiers, lasers, optical kev sib txuas lus thiab kho qhov muag qhov rais ... thiab lwm yam., nrog rau qhov zoo tshaj plaws optical transmittance thiab thermal stability.
| Cov khoom kuaj | Kev ua tau zoo | |
| Qhov ceev (g / cm3) | 3.2 | |
| Elastic Modulus (GPa) | 320 | |
| Poisson tus ratio | 0.24 ib | |
| Thermal conductivity W / (m * k) Chav Temp | 25 | |
| Coefficient ntawm Thermal | 2.79 ib | |
| Expansion (10-6/K) (RT ~ 500 ° C) | ||
| Rupture Strength 3 Point (MPa) | 950 ua | |
| Weibull Modulus | 13.05 Nws | |
| Vickers Hardness (HV10) Kg / hli | 1490 ib | |
| Fracture Toughness (KI, IFR) | 6.5-6.6 | |
| Qhov Loj (gm) | ≤ 7 | |
| Mix (ntau / cm) | 25-50 | 2 |
| 50-100 | 0 | |
| 100-200 | 0 | |
| > 200 | 0 | |