Characterization and properties of CuZrAlTiNi high entropy alloy coating obtained by mechanical alloying and vacuum hot pressing sintering

2017 ◽  
Vol 28 (10) ◽  
pp. 2556-2563 ◽  
Author(s):  
Wenjuan Ge ◽  
Bo Wu ◽  
Shouren Wang ◽  
Shuai Xu ◽  
Caiyun Shang ◽  
...  
Keyword(s):  
Mechanical Alloying ◽  
Hot Pressing ◽  
Alloy Coating ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Vacuum Hot Pressing ◽  
Hot Pressing Sintering

Characterization and Properties of CuZrAlTiNiSi High Entropy Alloy Coating Obtained By Mechanical Alloying and Vacuum Hot-Pressing Sintering

JOM ◽  
2020 ◽  
Vol 72 (3) ◽  
pp. 1254-1263 ◽  
Author(s):  
Zihan Han ◽  
Dongzhi Wang ◽  
Xiaohan Chen ◽  
Guomang Shao ◽  
Xi Zhang ◽  
...  
Keyword(s):  
Mechanical Alloying ◽  
Hot Pressing ◽  
Alloy Coating ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Vacuum Hot Pressing ◽  
Hot Pressing Sintering

scholarly journals Microstructure and Properties of CoCrFeNi(WC) High-Entropy Alloy Coatings Prepared Using Mechanical Alloying and Hot Pressing Sintering

Coatings ◽  
2018 ◽  
Vol 9 (1) ◽  
pp. 16 ◽  
Author(s):  
Juan Xu ◽  
Shouren Wang ◽  
Caiyun Shang ◽  
Shifeng Huang ◽  
Yan Wang
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Mechanical Alloying ◽  
Hot Pressing ◽  
High Entropy Alloy ◽  
Solid Solution Phase ◽  
Second Phase ◽  
Face Centered Cubic ◽  
High Entropy ◽  
Hot Pressing Sintering

The CoCrFeNi high-entropy alloy coatings (HEACs) with different weight ratios (10 and 30 wt.%) of WC additions have been prepared using mechanical alloying and a vacuum hot pressing sintering technique on a Q235 steel substrate. The microstructures, microhardness, wear resistance, and corrosion resistance of HEACs were studied. The CoCrFeNi(WC) powders were obtained by mixing the CoCrFeNi HEA powders and WC particles. The sintered products of both HEACs with high relative density contained one solid solution phase with face-centered cubic structure, WC, and unknown precipitate phases. The transition boundary had a good metallurgical bonding with the coating and substrate. The average microhardness values of CoCrFeNi HEACs with 10 and 30 wt.% WC additions reached 475 and 531 HV respectively, which were far higher than that of the substrate (160 HV). Moreover, both coatings exhibited better wear resistance than the substrate under the same wear conditions. The 30 wt.% WC HEAC displayed the lower friction coefficient, and the shallower wear groove depth. The grain refinement strengthening and second-phase particle strengthening could be beneficial to the enhanced hardness and wear resistance of coatings with WC additions. The corrosion behavior of the tested samples in the 3.5 wt.% NaCl solution were investigated using electrochemical polarization measurements. The CoCrFeNi(WC) coatings all revealed the improved corrosion resistance. Especially, a 10 wt.% WC addition remarkably enhanced the comprehensive corrosion resistance and easy passivation of CoCrFeNi HEAC.

FABRICATION AND WEAR BEHAVIOR ANALYSIS ON AlCrFeNi HIGH ENTROPY ALLOY COATING UNDER DRY SLIDING AND OIL LUBRICATION TEST CONDITIONS

2016 ◽  
Vol 23 (04) ◽  
pp. 1650018 ◽  
Author(s):  
YIPIN TANG ◽  
SHOUREN WANG ◽  
BIN SUN ◽  
YAN WANG ◽  
YANG QIAO
Keyword(s):  
Hot Pressing ◽  
Solution Structure ◽  
Wear Behavior ◽  
Alloy Coating ◽  
High Entropy Alloy ◽  
Dry Sliding ◽  
High Entropy Alloys ◽  
Oil Lubrication ◽  
High Entropy ◽  
Hot Pressing Sintering

In this paper, AlCrFeNi high entropy alloy coating was fabricated on the surface of Q235 steel using hot pressing sintering process. The coating has the controlled thickness size and excellent mechanical properties. Scanning electron microscopy (SEM), XRD and hardness testing method were used to study the morphology, phase structure and hardness of high entropy alloys coating. The lattice distortion plays a significant role in increasing the hardness. Coating formation mechanism caused by the element diffusion under the hot pressing effect is also discussed in the paper. Simultaneously, the dry sliding and oil lubrication wear tests, wear morphology observation and wear mechanism discussion were completed. As the result shows, AlCrFeNi high entropy alloys coating exhibits superior wear resistance either at dry sliding or oil lubrication tests owing to its hard high entropy solid solution structure.

AlCrFeNi High-Entropy Coating Fabricated by Mechanical Alloying and Hot Pressing Sintering

2017 ◽  
Vol 898 ◽  
pp. 628-637 ◽  
Author(s):  
Cai Yun Shang ◽  
Yan Wang
Keyword(s):  
Solid Solution ◽  
Wear Resistance ◽  
Corrosion Resistance ◽  
Mechanical Alloying ◽  
Hot Pressing ◽  
Steel Substrate ◽  
Solid Solution Phase ◽  
High Entropy ◽  
Vacuum Hot Pressing ◽  
Hot Pressing Sintering

The AlCrFeNi high entropy coating was successfully prepared by mechanical alloying and vacuum hot pressing sintering technique on Q235 steel substrate, and the microstructures and microhardness, wear resistance and corrosion resistance were characterized in detail. Results showed that single body-centered cubic solid solution phase appears when the blended powder is ball milled for 30 h. The vacuum hot pressing sintered AlCrFeNi high entropy coating with single BCC solid solution is about 500 μm in thickness, which metallurgically bonded to substrate. The microhardness of the AlCrFeNi high entropy coating is about 520 HV, more than three times larger than that of the substrate. The wear resistance and corrosion resistance of the coating in 3.5% NaCl solution are greatly improved compared with the substrate, showing a dramatic reduction in average corrosion rate and wider passive range.

Sign in / Sign up

Export Citation Format

Share Document