کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7991058 | 1516135 | 2018 | 29 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microstructural and electrochemical study of a brazed WC based metal matrix composite obtained by infiltration process
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In the present work, a metal matrix composite (MMC) was produced by the infiltration of a Ni-based bronze (74.4â¯wt.% Cu. 15.8â¯wt.% Sn, 3.8â¯wt.% Mn and 5.5â¯wt.% Ni) into a mixture of WC/W2C, Cu and Mn powder. The obtained piece was subsequently assembled to the WC-Co cermet of a polycrystalline diamond compact (PDC) insert. The joint was performed by oxyacetylene brazing process using an Ag based alloy (49â¯wt.% Ag, 23â¯wt.% Zn, 16â¯wt.% Cu 7.5â¯wt.% Mn, 4.5â¯wt.% Ni) as the brazing filler metal (BFM). The microstructure of the resulting system was studied by means of Scanning Electron Microscopy and X-Ray diffraction. Of special interest is the MMC and MMC/BFM interface, where the formation of an inter-diffusion zone is observed with the presence of new phases such as, AgMn19, Mn-Zn and Cu-Zn, that enhanced the bonding of the MMC to the WC-Co cermet. Additionally, the electrochemical behavior of the interface was studied in 0.5â¯M NaOH solution, followed by the analysis of the electrolytes by Inductively Coupled Plasma Atomic Emission Spectrometry. The results highlight an uneven dissolution of the constituent phases at the MMC/BFM interface due to localized corrosion processes and galvanic interactions occurring between phases of different composition.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 759, 30 August 2018, Pages 22-31
Journal: Journal of Alloys and Compounds - Volume 759, 30 August 2018, Pages 22-31
نویسندگان
Nouredine Bouzegzi, Djamel Miroud, Fatma Ahnia, Germán Alcala, Francisco Javier Perez, Khadidja Khenfer, Malik Tata, Sonia Mato,