{"id":32978,"date":"2019-10-31T21:50:04","date_gmt":"2019-10-31T18:50:04","guid":{"rendered":"https:\/\/prohoster.info\/blog\/razrabotana-3d-pechat-metallami-s-razresheniem-250-nm\/"},"modified":"2019-10-31T21:50:04","modified_gmt":"2019-10-31T18:50:04","slug":"razrabotana-3d-pechat-metallami-s-razresheniem-250-nm","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/razrabotana-3d-pechat-metallami-s-razresheniem-250-nm","title":{"rendered":"Desenvolvimento de impress\u00e3o 3D com metais em resolu\u00e7\u00e3o de 250 nm","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

O uso da impress\u00e3o 3D j\u00e1 n\u00e3o surpreende mais ningu\u00e9m. \u00c9 poss\u00edvel imprimir objetos em casa e no trabalho, tanto em metal quanto em pl\u00e1stico. Agora, \u00e9 apenas necess\u00e1rio reduzir a resolu\u00e7\u00e3o do funcionamento dos bicos e aumentar a variedade de materiais de origem. E em cada uma dessas \u00e1reas ainda h\u00e1 muito a ser feito.<\/p>\n

\"Desenvolvimento<\/p>\n

Uma nova conquista no aprimoramento da impress\u00e3o 3D foi anunciada<\/a><\/noindex> por cientistas sob a lideran\u00e7a de pesquisadores da Escola Polit\u00e9cnica Federal de Zurique (ETH Zurich). Os cientistas apresentaram uma nova tecnologia promissora para a impress\u00e3o de microobjetos met\u00e1licos com resolu\u00e7\u00e3o extremamente alta - at\u00e9 250 nm. Atualmente, a impress\u00e3o 3D de microobjetos met\u00e1licos \u00e9 realizada com tintas especialmente feitas. Estas s\u00e3o nanopart\u00edculas de metal suspensas em um l\u00edquido (suspens\u00e3o). A resolu\u00e7\u00e3o dessas impressoras \u00e9 em micr\u00f4metros, e a impress\u00e3o \u00e9 conclu\u00edda com uma etapa de recozimento para fixar o modelo. Nesta fase final, existem in\u00fameras desvantagens, incluindo a forma\u00e7\u00e3o de porosidade baixa e contamina\u00e7\u00e3o org\u00e2nica (por solventes). O que os su\u00ed\u00e7os est\u00e3o propondo?<\/p>\n

\"Desenvolvimento
\n<\/center><\/p>\n

Cientistas de Zurique substitu\u00edram a suspens\u00e3o met\u00e1lica pela impress\u00e3o direta de metais. Mais precisamente, por \u00edons met\u00e1licos. Foi proposta uma constru\u00e7\u00e3o de cabe\u00e7ote de impress\u00e3o com dois chamados \u00e2nodos descart\u00e1veis. Por que dois? Porque assim \u00e9 melhor! \u00c9 poss\u00edvel imprimir um microobjeto met\u00e1lico alternando entre um ou outro metal ou at\u00e9 mesmo com os dois ao mesmo tempo, criando uma liga com a propor\u00e7\u00e3o desejada de um e outro material. O princ\u00edpio da impress\u00e3o 3D proposta \u00e9 que, sob alta tens\u00e3o aplicada ao \u00e2nodo, os \u00edons de metal se desprendem e voam em dire\u00e7\u00e3o ao substrato, onde se depositam e se transformam no metal base. Para que isso funcione, o substrato \u00e9 coberto com uma camada de solvente, onde ocorrem rea\u00e7\u00f5es qu\u00edmicas de oxida\u00e7\u00e3o-redu\u00e7\u00e3o. Assim, a impress\u00e3o ocorre imediatamente com metal puro e n\u00e3o requer recozimento posterior.<\/p>\n

\r\n \"Por\r\n
<\/div>\r\n <\/div><\/center><\/p>\n

As aplica\u00e7\u00f5es dessa tecnologia s\u00e3o diversas. Mas as primeiras que v\u00eam \u00e0 mente s\u00e3o a microeletr\u00f4nica e a cria\u00e7\u00e3o de metamateriais com propriedades incomuns. A impress\u00e3o com essa precis\u00e3o ajudar\u00e1 a criar conex\u00f5es ultrafinas e at\u00e9 a utilizar materiais org\u00e2nicos na eletr\u00f4nica. Falando sobre metamateriais, a combina\u00e7\u00e3o de metais pode levar ao desenvolvimento de materiais com propriedades mec\u00e2nicas interessantes, como serem simultaneamente flex\u00edveis e resistentes.<\/p>\n

<\/p>\n

<\/center><\/p>\n

\t\t\t\t


\n\t\t\t\t\t\t\t\t<\/center>
Fonte: 3dnews.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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