Under de senaste \u00e5ren har m\u00e4nniskor genomf\u00f6rt mycket forskning om sintring av lufttryck och uppn\u00e5tt stora framsteg. Gastryckssintring av kiselnitridkeramik utf\u00f6rs vid en temperatur av cirka 2000 \u00b0 C under ett gastryck p\u00e5 1 till 10 MPa. H\u00f6gt kv\u00e4vetryck undertrycker pyrolys av kiselnitrid. P\u00e5 grund av anv\u00e4ndningen av h\u00f6gtemperatursintring \u00e4r tillsatsen av mindre sintringshj\u00e4lpmedel tillr\u00e4cklig f\u00f6r att fr\u00e4mja tillv\u00e4xten av si3n4-keramikkorn och erh\u00e5lla keramik med h\u00f6g h\u00e5rdhet med in-situ-tillv\u00e4xt av l\u00e5nga kolonnkorn med en densitet> 99%. D\u00e4rf\u00f6r kan lufttryckssintring si3n4-keramik anv\u00e4ndas mer och mer i laboratorium och i produktion. Gastryckssintrad kiselnitridkeramik har h\u00f6g seghet, h\u00f6g h\u00e5llfasthet och god slitstyrka och kan direkt producera olika komplexa former n\u00e4ra den slutliga formen, vilket kraftigt kan minska produktionskostnaden och bearbetningskostnaden f\u00f6r kiselnitrid. Och dess produktionsprocess ligger n\u00e4ra produktionsprocessen f\u00f6r cementerad h\u00e5rdmetall, l\u00e4mplig f\u00f6r massproduktion.<\/p>","protected":false},"excerpt":{"rendered":"
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