Silicon Carbide Ceramic

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Ko te Silicon carbide he momo carbide waihanga me te ngota ngota SiC. I te wa e whakakahangia ana, ka hangahia te silica me te waro i te pāmahana teitei i runga ake i te 2000°C. Ko te carbide silicone he 3.18g/cm3 te kiato ariā, he Mohs pakeke e whai ana i te taimana, me te microhardness o 3300kg/mm3 i waenga i te 9.2 me te 9.8. Na te kaha o te pakeke me te kaha o te kakahu, kei a ia nga ahuatanga o te wera nui o te wera me te whakamahia mo nga momo momo miihini-aukati, te waikura me nga waahanga miihini teitei. He momo hou o te hangarau karaera kakahu-atete.

1, āhuatanga matū.

(1) Atete oxidation: I te wa e wera ana te rauemi carbide silicon ki te 1300 ° C i roto i te rangi, ka timata te paparanga whakamarumaru o te silicon dioxide ki runga i te mata o tana karaihe carbide silicon. Na te matotoru o te paparanga whakamarumaru, kei te haere tonu te oxidize o te carbide silicon o roto, kia pai ai te aukati oxidation o te carbide silicon. Ka eke te pāmahana ki runga ake i te 1900K(1627 ° C), ka tiimata te pakaru o te kiriata whakamarumaru hauhauora, ka kaha ake te whakamaaramatanga o te carbide silicon, na ko te 1900K te pāmahana mahi o te silicon carbide i roto i te hau whakapouri.

(2) Atete waikawa me te kawakore: na te mahi o te kiriata whakamarumaru hauhaurua, he taonga a te carbide silicon i roto i te mahi o te kiriata whakamarumaru haurua.

2、Ko nga ahuatanga o te tinana me te miihini.

(1) Kiato: He tino tata te kiato matūriki o nga momo tioata carbide silicon, e kiia ana ko te 3.20g/mm3, a, ko te 1.2-1.6g/mm3 te kiato putunga taiao o te kirikiri carbide abrasives, i runga i te rahi o te matūriki, hanganga rahi matūriki me te hanga rahi matūriki.

(2) Maamaa: Ko te Mohs pakeke o te silicon carbide he 9.2, ko te micro-density o Wessler ko 3000-3300kg / mm2, ko te pakeke o Knopp he 2670-2815kg / mm, he teitei ake te abrasive i te corundum, tata ki te taimana, cubic boron nitride me te boron carbide.

(3) Waariki te kawe: ko nga hua carbide silicon he nui te kawe waiariki, he iti te whakareatanga whakareatanga waiariki, he nui te parenga waiariki, he taonga whakaahuru-kounga teitei.

3. Nga taonga hiko.

Tūemi Waeine Raraunga Raraunga Raraunga Raraunga Raraunga
RBsic(sisic) NBSiC SSiC RSiC OSiC
ihirangi SiC % 85 76 99 ≥99 ≥90
He ihirangi silicon kore utu % 15 0 0 0 0
Paemahana ratonga Max 1380 1450 1650 1620 1400
Kiato g/cm^3 3.02 2.75-2.85 3.08-3.16 2.65-2.75 2.75-2.85
Porosity tuwhera % 0 13-15 0 15-18 7-8
Te kaha piko 20℃ Mpa 250 160 380 100 /
Te kaha piko 1200 ℃ Mpa 280 180 400 120 /
Kōwae o te elasticity 20 ℃ Gpa 330 580 420 240 /
Modulus o te elasticity 1200 ℃ Gpa 300 / / 200 /
Te kawe werawera 1200 ℃ W/mk 45 19.6 100-120 36.6 /
Te whakarea o te roha wera K^-lx10^-8 4.5 4.7 4.1 4.69 /
HV kg/m^m2 2115 / 2800 / /
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