کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1599974 1515861 2014 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microstructure development during pack aluminization of nickel and nickel-chromium wires
ترجمه فارسی عنوان
توسعه میکروارگانیسم در طول آلومینیوم سازی سیمهای نیکل و کروم نیکل
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
چکیده انگلیسی
Pack aluminization - a chemical vapor deposition process widely used to form protective coatings on Ni-based superalloy components - was used to form shells of Ni2Al3, NiAl and/or γ′-Ni3Al on the surface of γ-Ni wires with diameters of 127 μm. The growth kinetics of these Al-rich intermetallic shells are studied as a function of aluminization time and pack activity at 1000 °C. Similar kinetics but additional phases (Cr/Ni two-phase shell, Cr silicide particles and Al-rich particles distributed in Ni2Al3) are found in the shells of pack-aluminized Ni-20 wt.% Cr wires with similar diameters. Fully homogenous Ni-Al and Ni-Cr-Al wires are achieved by interdiffusion at 1200 °C between the deposited Al-rich intermetallic shells and the Ni-rich core of both types of wires. Upon subsequent aging at 900 °C, wires with γ/γ′ structure and high hardness indicative of precipitation strengthening are obtained.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Intermetallics - Volume 50, July 2014, Pages 43-53
نویسندگان
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