Effect of Heat Treatment on Mechanical Properties and Corrosion Performance of Cold-Sprayed Tantalum Coatings

被引：34
作者：
Kumar, S. [1 ]
Vidyasagar, V. [1 ]
Jyothirmayi, A. [1 ]
Joshi, S. V. [1 ]
机构：
[1] Int Adv Res Ctr Powder Met & New Mat ARCI, Hyderabad 500005, Andhra Pradesh, India
来源：
JOURNAL OF THERMAL SPRAY TECHNOLOGY | 2016年 / 25卷 / 04期
关键词：
cold spray; corrosion protection; electrochemical characterization; heat treatment; nanoindentation; scratch or impact loading testing; tantalum; MILD-STEEL; PROCESS PARAMETERS; BEHAVIOR; DEPOSITION; ALLOY; MICROSTRUCTURE; OXIDATION; TITANIUM;
D O I：
10.1007/s11666-016-0388-6
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The cold-spray technique is of significant interest to deposit refractory metals with relatively high melting point for a variety of demanding applications. In the present study, mechanical properties of cold-sprayed tantalum coatings heat treated at different temperatures were investigated using microtensile testing, scratch testing, and nanoindentation. The corrosion performance of heat-treated coatings was also evaluated in 1 M KOH solution, and potentiodynamic polarization as well as impedance spectroscopy studies were carried out. Assessment of structure-property correlations was attempted based on microstructure, porosity, and intersplat bonding state, together with mechanical and corrosion properties of the heat-treated cold-sprayed tantalum coatings. Coatings annealed at 1500 A degrees C, which is very close to the recrystallization temperature of tantalum, were found to perform almost as bulk tantalum, with exciting implications for various applications.
引用
收藏
页码：745 / 756
页数：12
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