Kev siv tshuaj sintering silicon carbide yog ib txoj kev los npaj cov khoom siv ceramic ua tau zoo. Nws reacts thiab nias silicon carbide hmoov nrog lwm cov tshuaj lom neeg hauv qab qhov kub siab kom tsim cov khoom ntom ntom, tawv, hnav tsis kam thiab tiv taus corrosion.
1. Txoj kev npaj. Cov txheej txheem npaj ntawm reactive sintering silicon carbide feem ntau muaj ob kauj ruam: reaction thiab sintering. Hauv theem reaction, cov hmoov silicon carbide reacts nrog lwm cov tshuaj ntawm qhov kub siab los tsim cov tshuaj nrog cov ntsiab lus melting qis dua, xws li alumina, boron nitride thiab calcium carbonate. Cov tshuaj no tuaj yeem ua haujlwm ua cov binders thiab fillers los pab ua kom muaj peev xwm sib txuas thiab fluidity ntawm silicon carbide hmoov thaum txo cov qhov hws thiab qhov tsis zoo hauv cov khoom. Hauv theem sintering, cov khoom tshuaj yog sintered ntawm qhov kub siab los tsim cov khoom siv ceramic ntom ntom. Cov yam xws li kub, siab thiab huab cua tiv thaiv yuav tsum tau tswj hwm hauv cov txheej txheem sintering kom ntseeg tau tias cov khoom muaj kev ua tau zoo. Cov khoom siv ceramic silicon carbide tau txais muaj cov yam ntxwv ntawm kev nyuaj siab, lub zog siab, kev tiv thaiv corrosion siab thiab kev tiv thaiv hnav siab.
2. Cov Khoom. Cov khoom siv silicon carbide uas tau sintered muaj ntau yam khoom zoo heev, ua rau nws siv dav hauv ntau qhov chaw. Ua ntej tshaj plaws, cov khoom siv silicon carbide ceramic muaj qhov nyuaj heev thiab tuaj yeem txiav cov khoom tawv xws li hlau. Qhov thib ob, cov khoom siv silicon carbide ceramic muaj kev tiv thaiv zoo thiab tuaj yeem siv tau ntev hauv cov xwm txheej hnyav xws li kub thiab siab. Tsis tas li ntawd, cov khoom siv silicon carbide ceramic muaj kev tiv thaiv corrosion siab thiab kev ruaj khov kub, thiab tuaj yeem siv tau ntev hauv cov chaw corrosive thiab kub siab.
3. Cov teb thov. Cov tshuaj silicon carbide uas tau sintered siv rau ntau qhov chaw. Piv txwv li, hauv kev lag luam tsim khoom, cov khoom siv ceramic silicon carbide siv dav hauv cov khoom siv abrasives, cov cuab yeej txiav thiab cov khoom hnav. Nws qhov nyuaj thiab kev tiv thaiv kev hnav ua rau nws muaj txiaj ntsig zoo rau kev txiav, sib tsoo thiab sib tsoo.
Zoo tagnrho rau kev txhuam thiab lwm yam teb. Hauv kev lag luam tshuaj lom neeg, cov khoom siv silicon carbide ceramic tuaj yeem siv los tsim cov tshuaj xws li sulfuric acid thiab cov kua qaub muaj zog xws li hydrofluoric acid vim lawv qhov kev tiv thaiv corrosion siab thiab kev ruaj khov kub siab. Hauv kev lag luam aerospace thiab kev tiv thaiv, cov khoom siv silicon carbide ceramic tuaj yeem siv los ua cov foob pob hluav taws thiab cov khoom siv tiv thaiv thermal rau cov dav hlau ceev ceev. Tsis tas li ntawd, cov khoom siv silicon carbide ceramic kuj tseem tuaj yeem siv rau hauv kev kho mob biomedical ntawm cov pob qij txha dag thiab cov cuab yeej phais orthopedic, vim lawv muaj kev sib raug zoo biocompatibility thiab hnav tsis kam.
Kev siv tshuaj silicon carbide sintering yog ib txoj kev los npaj cov khoom siv ceramic ua haujlwm siab. Nws reacts thiab nias silicon carbide hmoov nrog lwm yam tshuaj nyob rau hauv qhov kub siab kom tsim cov khoom siv ntom ntom, siab hardness, siab hnav tsis kam thiab siab corrosion. Silicon carbide ceramic khoom muaj cov yam ntxwv zoo, xws li siab hardness, siab hnav tsis kam, siab corrosion tsis kam thiab siab kub stability, yog li nws yog dav siv hauv ntau qhov chaw xws li kev tsim khoom, kev lag luam tshuaj lom neeg, aerospace thiab kev tiv thaiv teb chaws thiab biomedical teb.
Lub sijhawm tshaj tawm: Lub Xya Hli-08-2023