Pseudopartial wetting of WSW grain boundaries by the nickel-rich layers

被引：24

作者：

Mazilkin, A. A. ^{[1
,2
]}

Straumal, B. B. ^{[1
,2
,3
]}

Protasova, S. G. ^{[1
]}

Bulatov, M. F. ^{[4
]}

Baretzky, B. ^{[2
]}

机构：

[1] Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Moscow District, Russia

[2] Karlsruher Inst Technol, Inst Nanotechnol, Eggenstein Leopoldshafen, Germany

[3] Natl Univ Sci & Technol MISIS, Moscow, Russia

[4] Moscow Technol Univ MIREA, 78 Vernadsky Ave, Moscow 119454, Russia

来源：

MATERIALS LETTERS | 2017年 / 192卷

基金：

俄罗斯基础研究基金会;

关键词：

Nano-crystalline metals; Thermodynamics; Kinetics; Grain boundaries; Wetting; Tungsten; PHASE-TRANSITION; TUNGSTEN; COMPLEXIONS; ALLOYS; SYSTEM;

D O I：

10.1016/j.matlet.2016.12.049

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The excellent properties of heavy tungsten-based alloys are based on the combination of hardness of W grains, as well on the toughness and ductility of the binder with low melting temperature (usually containing nickel, iron, or copper). The topology (and resulting properties) of binder network are controlled by the complete and incomplete wetting of W/W grain boundaries (GBs) and GB triple junctions (TJ). We observed for the first time that pseudoincomplete (or pseudopartial, or frustrated complete) GB wetting by Ni layers is also present in W-Ni alloys. Namely, the channel of a Ni-rich solid solution in GB TJ forms the non-zero dihedral contact angle not only with "dry" W/W GBs (incomplete GB wetting), but also with W/W GBs containing the uniformly thin (3 nm) Ni-rich layer (pseudoincomplete GB wetting). (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：101 / 103

页数：3

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