Structure and phase composition of Nb/Ti system subjected to compression plasma flow impact

被引：9

作者：

Shymanski, V. I. ^{[1
]}

Cherenda, N. N. ^{[1
]}

Uglov, V. V. ^{[1
,2
]}

Astashynski, V. M. ^{[3
]}

Kuzmitski, A. M. ^{[3
]}

机构：

[1] Belarusian State Univ, Minsk 220030, BELARUS

[2] Tomsk Polytech Univ, Tomsk 634028, Russia

[3] Natl Acad Sci Belarus, AV Luikov Heat & Mass Transfer Inst, Minsk 220072, BELARUS

来源：

SURFACE & COATINGS TECHNOLOGY | 2015年 / 278卷

关键词：

Compression plasma flow; Titanium; Niobium; Solid solution; Alloying; Phase composition; Structure; surface morphology; Microhardness; MECHANICAL-PROPERTIES; SHAPE-MEMORY; TITANIUM; SURFACE; BEHAVIOR; NIOBIUM; STEEL; MICROSTRUCTURE; DEFORMATION; TEMPERATURE;

D O I：

10.1016/j.surfcoat.2015.08.014

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The results of structure, phase composition and mechanical properties of titanium alloyed with niobium atoms by means of compression plasma flow (CPF) impact on the "Nb coating (2.5 mu m)/Ti substrate" system are presented. The CPF treatment with the pulse duration of 100 mu s was carried out at the absorbed energy density of 13 J/cm(2) which is sufficient for melting of both niobium coating and some part of titanium substrate. The cross-section analysis by means of scanning electron microscopy revealed the formation of the alloyed layer with the thickness of 14 mu m and relatively uniform distribution of Nb along the depth (Nb concentration obtained by means of the EDX analysis was about 17 at.%). Alloying of titanium with Nb atoms resulted in stabilization of a high-temperature beta-Ti phase as a beta-Ti(Nb) solid solution. In the near surface layer the niobium interacted with impurity atoms (N and C) providing carbonitride (Nb(C,N) and carbide and Nb2C) possible formation. Phase transformation in the surface layer of titanium led to microhardness increase up to 4.7 GPa. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：183 / 189

页数：7

共 27 条

[1] Compressive plasma flows interaction with steel surface: structure and mechanical properties of modified layer [J].