ʻO nā mea hana seramika kiʻekiʻe no nā noi lawelawe koʻikoʻi

Hoʻohana mākou i nā kuki e hoʻonui i kou ʻike. Ma ka hoʻomau ʻana i ka nānā ʻana i kēia pūnaewele e ʻae ʻoe i kā mākou hoʻohana ʻana i nā kuki.
ʻAʻohe wehewehe mana o ka lawelawe koʻikoʻi. Hiki ke noʻonoʻo ʻia e pili ana i nā kūlana hana kahi e uku ai ke pani ʻana o ka valve a hōʻemi paha i ka hiki ke hana.
Pono ka honua e hōʻemi i nā kumukūʻai hana kaʻina hana e hoʻomaikaʻi i ka loaʻa kālā ma nā ʻoihana āpau e pili ana i nā kūlana lawelawe koʻikoʻi.
Ke hana nei nā mea hoʻolālā a me nā ʻenekinia e hoʻokō i kēia ma nā ʻano like ʻole.
He mea koʻikoʻi hoʻi ka hoʻonui ʻana i ka palekana, no ka mea, hiki i ka liʻiliʻi o nā mea pani ke alakaʻi i kahi wahi hana palekana. ʻO ka hopena, ʻo ka hoʻonui ʻia ʻana o ka hiki ke hana i nā paipu liʻiliʻi (akā ʻoi aku ka nui) a me nā mea hana no ka kahe huahana like a me nā mika liʻiliʻi.
Hōʻike kēia ma waho aʻe o ka ʻoi aku o ka nui no nā anawaena paipu ākea, pono nā ʻāpana ʻōnaehana hoʻokahi e kū i ka lōʻihi o ka hoʻolaha ʻana i nā wahi paʻakikī e hōʻemi i ka pono no ka mālama ʻana a me ka hoʻololi ʻana.
ʻO nā ʻāpana, me nā valves a me nā pōpō, pono e paʻa e kūpono i ka noi i makemake ʻia, akā hāʻawi pū kekahi i ke ola lawelawe lōʻihi. e ʻimi i nā mea ʻokoʻa i nā mea metala ʻole, ʻoi aku ka nui o nā mea seramika, no nā noi lawelawe koi.
ʻO nā ʻāpana maʻamau i koi ʻia no ka hana ʻana i nā ʻāpana ma lalo o nā kūlana lawelawe koʻikoʻi e pili ana i ke kūpaʻa haʻalulu wela, ka pale ʻana i ka corrosion, ke kūpaʻa luhi, ka paʻakikī, ka ikaika a me ka paʻakikī.
ʻO ke kūpaʻa he ʻāpana kī no ka mea hiki ke hāʻule nā ​​​​mea liʻiliʻi liʻiliʻi. Ua wehewehe ʻia ka paʻakikī o kahi mea seramika e like me ke kūʻē ʻana i ka hoʻolaha ʻana. Hāʻawi ka ʻaoʻao notch beam i nā ana pololei.
ʻO ka ikaika e pili ana i ka paʻakikī, akā e pili ana i ka helu hoʻokahi kahi i pau ʻole ai kahi mea i ka wā e hoʻopili ʻia ai ke koʻikoʻi. ana ma ka pahu ho'āʻo. Hāʻawi ka hōʻike ʻekolu-helu i ka 1% kiʻekiʻe o nā waiwai ma mua o ka hoʻāʻo ʻehā.
ʻOiai hiki ke ana ʻia ka paʻakikī ma nā ʻano unahi like ʻole me Rockwell a me Vickers, ʻo ka Vickers microhardness scale ua kūpono maikaʻi no nā mea ceramic kiʻekiʻe. ʻokoʻa ka paʻakikī i ke kūpaʻa ʻana o ka mea.
I loko o nā valves e hana ana ma ke ʻano cyclic, ʻo ka luhi ka pilikia nui ma muli o ka wehe mau ʻana a me ka pani ʻana o ka pahu.
ʻO ke kūpaʻa ʻana o ka corrosion e pili ana i ke kaiapuni hana a me ka media i loaʻa i ka material.Many advanced ceramic material outperform metala ma kēia wahi, me ka ʻokoʻa o kekahi mau mea zirconia-based e "hydrothermally degrade" ke ʻike ʻia i ka mahu wela wela.
Part geometry, coefficient of thermal expansion, thermal conductivity, toughness, and strength is all affected by thermal shock.This is a part that promote high thermal conductivity and toughness, a no laila, hana pono nā ʻāpana metala. hāʻawi i nā pae kūpono o ke kūpaʻa haʻalulu wela.
Ua hoʻohana ʻia nā ceramics kiʻekiʻe no nā makahiki he nui a kaulana i waena o nā ʻenekini hilinaʻi, nā mea hana mea kanu a me nā mea hoʻolālā valve e koi ana i ka hana kiʻekiʻe a me ka waiwai. ʻO ke koʻikoʻi ma ke kahua o nā kīwī lawelawe koʻikoʻi, a ua komo pū lākou i ka silicon carbide (SiC), silicon nitride (Si3N4), alumina a me zirconia. Ua koho ʻia nā mea valve a me nā valve ball ma muli o nā koi noi kikoʻī.
ʻElua mau ʻano nui o ka zirconia i hoʻohana ʻia i loko o nā kiwi e like me ka coefficient o ka hoʻonui ʻana o ka wela a me ka ʻoʻoleʻa e like me ke kila. ) ʻoi aku ka paʻakikī akā hiki i ka hydrothermal degradation.
Loaʻa ka Silicon Nitride (Si3N4) i nā ʻano hana like ʻole. ʻO ka Gas Pressure Sintered Silicon Nitride (GPPSN) ka mea maʻamau i hoʻohana ʻia no nā valves a me nā ʻāpana valve, e hāʻawi ana i ka paʻakikī kiʻekiʻe a me ka ikaika, ke kūpaʻa haʻalulu maikaʻi loa a me ke kūpaʻa wela ma kahi o ka paʻakikī awelika. Eia kekahi, hāʻawi ʻo Si3N4 i kahi pani kūpono no ka zirconia i loko o nā wahi mahu wela wela, e pale ana i ka degradation hydrothermal.
Ma muli o nā kumukūʻai paʻa, hiki i nā mea kikoʻī ke koho mai SiC a i ʻole Alumina. He kiʻekiʻe ka paʻakikī o nā mea ʻelua, akā ʻaʻole i ʻoi aku ka ikaika ma mua o ka zirconia a i ʻole silicon nitride. Hōʻike kēia i kēia mau mea i kūpono no nā noi mea static e like me nā valve bushings a me nā noho, ma mua o ka pōpō koʻikoʻi kiʻekiʻe a diski paha.
He haʻahaʻa ka paʻakikī a me ka ikaika like ʻole o nā mea metala i hoʻohana ʻia i nā noi valve lawelawe koʻikoʻi, me ka hao chromium (CrFe), tungsten carbide, Hastelloy a me Stellite.
ʻO nā noi lawelawe koʻikoʻi e pili ana i ka hoʻohana ʻana i nā kīwaha rotary e like me nā valves butterfly, trunnions, floating ball valves a me nā punawai. o ka mea, ke ola lawelawe o na mea he mau manawa kiʻekiʻe ma mua o nā mea metala. ʻO nā pōmaikaʻi ʻē aʻe e pili ana i nā hiʻohiʻona hana o ka valve ma luna o kona ola pono, ʻoi aku hoʻi i nā wahi i mālama ʻia ai ka hiki ke pani a me ka mana.
Hōʻike ʻia kēia i ka hoʻohana ʻana i ka 65 mm (2.6 in) valve kynar / RTFE ball a me ka liner i hōʻike ʻia i ka 98% sulfuric acid a me ka ilmenite, e hoʻohuli ʻia ana i ka titanium oxide pigment. mau pule a hiki i ʻeono pule. Akā naʻe, me ka hoʻohana ʻana i ka ʻoki pōlele pōleʻa (Figure 1) i hana ʻia mai Nilcra!", he proprietary magnesia partially stabilized zirconia (Mg-PSZ) e hāʻawi ana i ka paʻakikī maikaʻi loa a me ka pale ʻana i ka corrosion, hāʻawi i kahi lawelawe ʻekolu makahiki ʻaʻohe ʻaʻahu ʻike ʻia.
I loko o ka laina laina e like me ke kihi, throttle a i ʻole globe valves, zirconia a me ka silicon nitride e kūpono i ka plug a me ka noho ma muli o ke ʻano "noho paʻa" o kēia mau huahana.Pēlā, hiki ke hoʻohana ʻia ka alumini oxide i kekahi mau laina a me nā cages. Hiki ke ho'okō 'ia ka ho'opa'a 'ana ma ka ho'olike 'ana i nā pōpō wili ma ka noho valve.
No ka valve bushings, me ka valve plug, inlet a me ka puka, a me ke kino bushings, hiki ke hoʻohana i kekahi o na mea nui seramika eha ma muli o ka noi koi. ola o ka huahana.
No ka laʻana, e lawe i kahi valve butterfly DN150 i hoʻohana ʻia i loko o kahi mea hoʻomaʻemaʻe bauxite Australia. ʻO ka ʻike silica kiʻekiʻe o ka media hiki ke hoʻoulu i nā pae kiʻekiʻe o ka ʻaʻahu ma nā pahu valve. 8 a 10 mau pule. Akā naʻe, me nā valves i hana ʻia me Nilcra!" Zirconia (Figure 2), ua hoʻonui ke ola lawelawe i 70 mau pule.
Ma muli o ko lākou paʻakikī a me ka ikaika, hana maikaʻi nā ceramics i ka hapa nui o nā noi valve. Akā naʻe, ʻo ko lākou paʻakikī a me ka pale ʻana i ka corrosion e kōkua i ka lōʻihi o ka valve. a me ka waihona waiwai, hōʻemi i ka lawelawe lima ʻana, a hoʻomaikaʻi i ka palekana ma o ka liʻiliʻi liʻiliʻi.
ʻO ka hoʻohana ʻana i nā mea seramika i loko o nā kīwaha kiʻekiʻe he mea nui ia no ka mea e pili ana kēia mau valve i nā ukana axial kiʻekiʻe a i ʻole torsional.
ʻO kekahi palena nui ʻo ia ka nui. ʻO ka noho nui loa a me ka pōleʻa nui loa (Figure 3) i hana ʻia mai ka magnesia partally stabilized zirconia ʻo DN500 a me DN250, pakahi.
ʻOiai ua hōʻoia ʻia nā mea seramika he koho kūpono, pono e hahai ʻia kekahi mau alakaʻi maʻalahi e hoʻonui i kā lākou hana. ma waho.
Pono e noʻonoʻo ʻia ka hoʻonui ʻana o ka wela i ka wā o ka hoʻolālā. hiki ke hoʻohui i nā kumukūʻai nui a pono ʻole.
Ma ka hahai ʻana i kēia mau alakaʻi a me nā hana maikaʻi loa no ke koho ʻana i nā mea waiwai a me ka hui pū ʻana me nā mea hoʻolako mai ka hoʻomaka ʻana o kahi papahana, hiki ke loaʻa kahi hopena kūpono no kēlā me kēia noi lawelawe koʻikoʻi.
Loaʻa kēia ʻike mai nā mea waiwai, nā loiloi a me nā hoʻololi i hāʻawi ʻia e Morgan Advanced Materials.
ʻO Morgan Advanced Materials - Technical Ceramics. (November 28, 2019). Advanced ceramic materials no ka koi ʻana i nā noi lawelawe.AZOM. Loaʻa iā Ianuali 14, 2022 mai https://www.azom.com/article.aspx?ArticleID=12305.
Morgan Advanced Materials – Technical Ceramics.
ʻO Morgan Advanced Materials – Technical Ceramics.
ʻO Morgan Mea Kūlana Kiʻekiʻe - Nā Keramika ʻenehana.2019. Nā Mea Hana Hana Kiʻekiʻe no ka Harsh Service Applications.AZoM, i loaʻa iā 14 Ianuali 2022, https://www.azom.com/article.aspx?ArticleID=12305.
Ma kēia nīnauele, kamaʻilio ʻo AZoM me Mohamed Rahaman, Missouri University of Science and Technology Professor Emeritus of Materials Science and Engineering, e pili ana i nā bioceramics a me kā lākou hiki ke hoʻohana i ka ʻenehana biomedical.
Ua kamaʻilio ʻo AZoM me Kauka Iolanda Duarte lāua ʻo Juliane Moura e pili ana i kā lākou noiʻi ʻana, e noʻonoʻo ana i ka hiki ʻana o nā flora extremophile ma nā panela photovoltaic.
Ua kamaʻilio ʻo AZoM me Professor Andrea Fratalocchi mai KAUST e pili ana i kāna noiʻi, e kālele ana i nā ʻano lanahu i ʻike mua ʻole ʻia.
ʻO ka hoʻohana pono ʻole ʻana i ka momona hiki ke alakaʻi i nā hemahema bearing. Me 40% o ke ola bearing ʻaʻole lawa e hoʻolako i kāna waiwai ʻenekinia, underlubrication a me overlubrication nā wahi koʻikoʻi e nānā. manawa kūpono.
ʻO kēia ka JX Nippon Mining & Metals 'standard rolled copper foil me ka maʻalahi kūpono a me ke kūpaʻa vibration.
ʻO Anton Paar's XRDynamic (XRD) 500 he automated multipurpose powder X-ray diffractometer. He mea hana XRD kūpono a maʻalahi.