NGA HUA
Pereki Si3N4-SiC
Silicon nitride herea silicon carbide pereki e tohu ana ki tetahi hua whakakorikori i mahia mai i te SiC me te Si hei rauemi mata me te nitrided.
Whakaahuatanga Taipitopito
I puta tuatahi tenei hua i te mutunga o te tekau tau atu i 1960, a ko tona ahuatanga ko te whakamahi i te Si3N4 hei here. Kei te noho a Si3N4 i waenga i nga karepe SiC i te ahua o te ngira, te kirikiri kiko ranei, a he momo mea nui hou o nga mea whakaahuru. Ko te tikanga kei roto i te 70% ki te 75% silicon carbide me 18% ki te 25% silicon nitride. He pai te parenga waikura, 1400 ℃ te kaha flexible o 50 ki te 55MPa, me te porosity kitea o 15%. Ko te whakarea roha wera (4.5 ki te 5.0) × 10-2 ℃-1. Kua rite te reira e te tikanga sintering pāmahana teitei. Kei te nuinga whakamahia te reira mo te tuyere oumu pupuhi me te konumohe ararewa pūtau electrolytic. I nga tau kua pahure ake nei, kua tonohia e to taatau kamupene nga pereki carbide silicon carbide ki te waha o te oumu hinu hinu me te putea wai silicon, e tino pai ake ana te oranga o te oumu me te oranga o te putea wai silicon.
Pereki Si3N4-SiC
Pereki Si3N4-SiC