ʻenehana - Introduction to Zirconia Coatings

ʻO Zirconia kahi pauka amorphous kaumaha keʻokeʻo a i ʻole monoclinic crystal, ʻaʻala ʻole, ʻono ʻole, aneane hiki ʻole ke hoʻoheheʻe ʻia i ka wai.ʻO ka helu hoʻoheheʻe e pili ana i 2700 ℃, me ka helu heheʻe kiʻekiʻe a me ka paila paila, ka paʻakikī a me ka ikaika, i ka mahana maʻamau e like me ka insulator, a ʻo ka wela kiʻekiʻe he mau waiwai maikaʻi loa e like me ka conductivity uila.Eia kekahi, paʻa loa nā waiwai kemika o ka zirconia, hiki ʻole ke hoʻoheheʻe ʻia i ka wai, hydrochloric acid a me ka dilute sulfuric acid, maikaʻi ka thermochemical stability, kiʻekiʻe wela conductivity a me ke kiʻekiʻe wela ka ikaika a me ka paʻakikī, i ka manawa like he mechanical, thermal, uila. ʻano ʻike maka.

Hoʻomākaukau ʻia ka uhi ʻana o Zirconia e ka plasma spraying, ʻo ia kekahi o nā uhi seramika maʻamau.Hoʻohana ka ʻenehana hoʻoheheʻe plasma i ka plasma arc i alakaʻi ʻia e ke au pololei ma ke ʻano he kumu wela, nā seramika hoʻomehana, nā ʻāpana, nā metala a me nā mea ʻē aʻe e hoʻoheheʻe ʻia a i ʻole semi-molten state, a me ka pīpī ʻana i ka wikiwiki kiʻekiʻe i ka ʻili o ka mea hana i hoʻomaʻamaʻa mua ʻia e hana i kahi ʻili paʻa. papa.ʻO ka pāpaʻi plasma e hoʻomākaukau i ka uhi zirconia, ʻo kāna mau hiʻohiʻona nui e like me kēia:

Hiki;

1, pale wela kiʻekiʻe: ʻo ka zirconia melting point ma kahi o 2700 ℃, hoʻohana pinepine ʻia i nā mea refractory, no laila, ʻoi aku ka maikaʻi o ka pale ʻana o ka zirconia.

Hiki;

2, ʻaʻahu kūʻē: ʻoi aku ka paʻakikī o ka zirconia ceramics a ʻoi aku ka maikaʻi o ka pale ʻana, ʻo kona paʻakikī Mohs ma kahi o 8.5, me ke kūpaʻa maikaʻi;

3.Thermal barrier coating: ʻO ka hoʻohana ʻana o ka plasma spraying zirconia thermal barrier coating ma nā mīkini kinoea ua holomua nui.I kekahi ʻano, ua hoʻohana ʻia i ka ʻāpana turbine o nā turbine kinoea, hiki ke hoʻomaikaʻi nui i ka lōʻihi o nā ʻāpana wela kiʻekiʻe.

Hoʻohana nui ʻia ka uea kila kila me ka uhi Zirconia ma ke kaiapuni hana kiʻekiʻe.ʻO nā kikoʻī maʻamau he 60mesh / 0.15mm a me 30mesh / 0.25mm. Hiki iā mākou ke hana i ka uhi ʻana ma nā ʻaoʻao ʻelua. Hiki i kēia ʻano mea ke hana i ka uhi ʻana ma ka mesh mesh Nickel. , pale ʻana i ka corrosion no nā ʻano mea hana like ʻole, ʻoi aku me ka alumini, molybdenum, platinum, rhodium a me ka titanium kēia mau mea.nā mea metala hoʻopaʻa ʻoi aku ka paʻa. He kūpono loa ia no ka uhi ʻana i ka mea wela o ka umu wela wela, hiki ke hoʻolōʻihi i kona ola lawelawe.