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نویسندگان مقالات پربازدید :
تکنولوژی پودر پیشرفته
جزئیات رویداد
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همایش ، رویداد ، ژورنال

  • the synthesis and characterization of ultrafine grain nial intermetallic

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    • تاریخ ارائه: 1393/01/01
    • تاریخ انتشار در تی پی بین: 1393/01/01
    • تعداد بازدید: 543
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the nanocrystalline nial powders were synthesized by mechanical alloying (ma), and the ultrafine grain nial bulk materials were subsequently consolidated by vacuum hot-pressed sintering. the microstructure and mechanical properties of milled powders and bulk materials were characterized. the results reveal that the nial powders were synthesized after 1.67 h of milling and the grains of nial were refined to 18 nm after 22 h of milling. during milling, the temperature rise caused by ma led to the annealing effect and consequently resulted in the abnormal decrease in microstrain and microhardness. nial bulk material with a relative density of 99.4% was prepared after sintering at 1300 °c and its grain size was about 400 nm. due to fine-grain strengthening, the compressive stress and compressive strain of nial bulk material were significantly improved at room temperature.

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