Silicon Carbide Ceramic

Silicon carbide wani nau'in carbide ne na roba tare da kwayoyin SiC. Lokacin da aka ƙarfafa, silica da carbon yawanci suna samuwa a yanayin zafi sama da 2000 ° C. Silicon carbide yana da ƙarancin ka'idar 3.18g/cm3, taurin Mohs wanda ke biye da lu'u-lu'u, da microhardness na 3300kg/mm3 tsakanin 9.2 da 9.8. Saboda tsananin taurinsa da tsayin daka, yana da sifofin juriya na zafin jiki kuma ana amfani da shi don nau'ikan juriya iri-iri, juriya da juriya da zafin jiki na inji. Sabuwar nau'in fasaha ce ta yumbu mai jure lalacewa.

1. Chemical Properties.

(1) Juriya na Oxidation: Lokacin da silica carbide abu ne mai tsanani zuwa 1300 ° C a cikin iska, silicon dioxide Layer kariya Layer fara halitta a saman ta silicon carbide crystal. Tare da thickening na karewa Layer, ciki silicon carbide ci gaba da oxidize, sabõda haka, silicon carbide yana da kyau hadawan abu da iskar shaka juriya. Lokacin da zafin jiki ya kai fiye da 1900K (1627 ° C), fim ɗin kariya na silicon dioxide ya fara lalacewa, kuma oxidation na silicon carbide yana ƙaruwa, don haka 1900K shine zafin aiki na silicon carbide a cikin yanayi mai oxidizing.

(2) Acid da alkali juriya: saboda rawar da fim ɗin kariya na silicon dioxide, silicon carbide yana da kaddarorin a cikin rawar fim ɗin kariya na silicon dioxide.

2. Jiki da inji Properties.

(1) Yawa: The barbashi yawa na daban-daban silicon carbide lu'ulu'u ne sosai kusa, kullum dauke su zama 3.20g / mm3, da kuma halitta shiryawa yawa na silicon carbide abrasives ne tsakanin 1.2-1.6g / mm3, dangane da barbashi size. abun da ke ciki size abun da ke ciki da barbashi size siffar.

(2) Taurin: Taurin Mohs na silicon carbide shine 9.2, micro-density na Wessler shine 3000-3300kg/mm2, taurin Knopp shine 2670-2815kg/mm, abrasive ya fi corundum, kusa da lu'u-lu'u, cubic boron nitride da boron carbide.

(3) Abubuwan da ke cikin Lailiyar Lantarki: Kayan Silicon Carbide suna da babban aiki na zafi, ƙarancin fadada yanayin fadada, kuma kayan kwalliyar Therner ta shimfida inganci.

3. Electrical Properties.