Novel in-situ formed Al-AlN ultrafine-grained composites prepared from fine nitrided Al powders

Martin Balog, Ma Qian, De Shin Liu, Yeau Ren Jeng, Tomas Svantner, Frantisek Simancik

研究成果: Conference contribution

摘要

This paper reports the development of novel Sintered Aluminium Powder (SAP)-like Al-AlN nanocomposites based on a concept of replacing the native Al2O3 thin films on fine Al powder with a large volume of in-situ formed nanometric AlN dispersoids. Fine gas-atomized Al powder (d50=1.3 μm) green compacts were first partially nitrided at 590 °C in flowing nitrogen, controlled by a small addition of Sn (0.3-0.4wt.%). The compacts were subsequently consolidated by hot working compaction techniques (direct extrusion and forging). The resulting Al-AlN composites consisted of sub-micrometric Al grains reinforced by nanometric AlN dispersoids, and a small presence of nanometric Al2O3 dispersoids. Al-13vol.% AlN nanocomposite exhibited attractive high temperature mechanical properties and thermal stability. The properties of in-situ Al-13vol.% AlN nanocomposite are compared to in-situ Al-2.3vol.% Al2O3 composites fabricated from the same fine Al powder and to the high Al2O3 content SAP materials.

原文English
主出版物標題International Powder Metallurgy Congress and Exhibition, Euro PM 2013
發行者European Powder Metallurgy Association (EPMA)
ISBN(電子)9781899072408
出版狀態Published - 2013 1月 1
事件International Powder Metallurgy Congress and Exhibition, Euro PM 2013 - Gothenburg, Sweden
持續時間: 2013 9月 152013 9月 18

出版系列

名字International Powder Metallurgy Congress and Exhibition, Euro PM 2013

Conference

ConferenceInternational Powder Metallurgy Congress and Exhibition, Euro PM 2013
國家/地區Sweden
城市Gothenburg
期間13-09-1513-09-18

All Science Journal Classification (ASJC) codes

  • 金屬和合金
  • 表面、塗料和薄膜
  • 表面和介面

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