کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7991200 | 1516137 | 2018 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
In-situ TiC-Graphite-Ni hybrid composites innovatively fabricated by pressureless reactive infiltration method
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
TiC-Graphite-Ni hybrid composites integrating high hardness of TiC, lubrication of graphite and good fracture toughness of Ni, present excellent tribological properties. This paper innovatively fabricates in-situ TiC-Graphite-Ni composites by pressureless reactive infiltration method, which is simple, low cost and applicable for composites with large and complex shape. The composition of composites is altered by designing C/Ti molar ratio in preforms. In-situ TiC and graphite homogeneously distribute in metal matrix with clean interface. Results show that the graphite content also affects the formation process of in-situ TiC. As C/Ti molar ratio increases from 1 to 1.5, graphite content in composites increases from 0 to 2.7â¯wt%, and TiC particle size reduces from 3.03â¯Î¼m to 2.58â¯Î¼m, resulting in the increase of Vickers hardness of composites from 527 to 664 HV2. With addition of TiC and graphite, tribological properties of Ni-based alloy are improved, which becomes more obvious as graphite content increases. The friction coefficient of composite with 2.7â¯wt% graphite is 19% lower than that of Ni-based alloy. The main wear mechanism of composites is abrasive wear.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 757, 15 August 2018, Pages 273-278
Journal: Journal of Alloys and Compounds - Volume 757, 15 August 2018, Pages 273-278
نویسندگان
Qian Qi, Lujie Wang, Yan Liu, Chao Zhang, Zhengren Huang,