Microstructure and Scratch Resistance of TaC Dense Ceramic Layer on an Iron Matrix

2016 ◽  
Vol 25 (6) ◽  
pp. 2375-2383 ◽  
Author(s):  
Nana Zhao ◽  
Yunhua Xu ◽  
Lisheng Zhong ◽  
Honghua Yan ◽  
Vladimir E. Ovcharenko
Keyword(s):  
Scratch Resistance ◽  
Ceramic Layer ◽  
Iron Matrix ◽  
Dense Ceramic

Study on TaC Reinforced Iron Matrix Surface Gradient Composites Produced In Situ

2016 ◽  
Vol 848 ◽  
pp. 38-42 ◽  
Author(s):  
Na Na Zhao ◽  
Yun Hua Xu ◽  
Ke Song ◽  
Liu Liu Shen ◽  
V.E. Ovcharenko
Keyword(s):  
Volume Fraction ◽  
Tantalum Carbide ◽  
Ceramic Layer ◽  
Wear Testing ◽  
Micro Hardness ◽  
Iron Matrix ◽  
Surface Gradient ◽  
Matrix Surface ◽  
Dense Ceramic

Tantalum carbide (TaC) gradient composites were fabricated via in-situ fabrication method from the tantalum plate and gray cast iron. The morphology, phase constituents, micro-hardness, and relative abrasion resistance of the composites were analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD), micro-hardness tester and abrasive wear testing machine. The surface layer, which was ~160μm thick, was dense ceramic layer composed by ~90% submicron TaC particulates. The highest micro-hardness value of the dense ceramic layer was 13.84 GPa. In the sub-layer, the gradient distribution of TaC particulates reflected in the volume fraction decreased from 90% to 0%. While the micro-hardness value decreased from 10.81 GPa to 4.10 GPa. The metallurgical combination of the interface between the composites and matrix was perfect. The wear resistance of TaC reinforced iron matrix surface gradient composites increased significantly.

Effect of oxidation time on the microstructure and properties of ceramic coatings prepared by microarc oxidation on 7A04 superhard aluminum alloy

2017 ◽  
Vol 31 (16-19) ◽  
pp. 1744026
Author(s):  
Feng Xiao ◽  
Hui Chen ◽  
Jingguo Miao ◽  
Juan Du
Keyword(s):  
Aluminum Alloy ◽  
Microarc Oxidation ◽  
Ceramic Coatings ◽  
Ceramic Layer ◽  
X Ray Diffraction ◽  
Oxidation Treatment ◽  
X Ray ◽  
Metallurgical Bonding ◽  
Dense Ceramic ◽  
Morphology Of Surface

Under the sodium aluminates’ system, microarc oxidation treatment was conducted on the superhard aluminum alloy 7A04 for different times. The microstructure of microarc oxidation ceramic layer was investigated by using scanning electron microscopy (SEM) and X-ray diffraction (XRD). The influences of different oxidation times on the adhesion strength of ceramic layer and substrate, the morphology of surface and cross-section, the phase composition and the electrochemical properties were studied. The results indicated that the connection of the coating and substrate appears to be metallurgical bonding and dense ceramic layer, and the surface is in a “volcanic vent” morphology, which is composed of [Formula: see text]-Al2O3 and little [Formula: see text]-Al2O3. The corrosion resistance of ceramic layer is improved significantly in contrast with that of the substrate.

Growth Kinetics of In Situ Preparation of Dense TiC Ceramic Layer-Reinforced Gray Cast Iron Matrix Surface Composites

2015 ◽  
Vol 17 (11) ◽  
pp. 1562-1567 ◽  
Author(s):  
Shaozhong Fan ◽  
Lisheng Zhong ◽  
Yunhua Xu ◽  
Yonghong Fu ◽  
Liangliang Wang
Keyword(s):  
Cast Iron ◽  
Growth Kinetics ◽  
Gray Cast Iron ◽  
Ceramic Layer ◽  
Iron Matrix ◽  
In Situ Preparation ◽  
Surface Composites ◽  
Matrix Surface ◽  
Kinetics Of

Kinetics of (Fe,Cr)7C3/Fe dense ceramic layer prepared by in situ synthesis

2019 ◽  
Vol 200 (1) ◽  
pp. 217-224
Author(s):  
FangXia Ye ◽  
Wen Zhang ◽  
LinNa Zhao ◽  
MiaoMiao Li ◽  
YuJun Lai ◽  
...  
Keyword(s):  
In Situ Synthesis ◽  
Ceramic Layer ◽  
Dense Ceramic ◽  
Kinetics Of

Formation mechanism and single abrasive wear of TaC dense ceramic layer on surface of gray cast iron

2019 ◽  
Vol 45 (12) ◽  
pp. 15580-15588 ◽  
Author(s):  
Nana Zhao ◽  
Yurong Zhao ◽  
Jilin Li ◽  
Xin Wang ◽  
Yiqi Wei ◽  
...  
Keyword(s):  
Cast Iron ◽  
Abrasive Wear ◽  
Formation Mechanism ◽  
Gray Cast Iron ◽  
Ceramic Layer ◽  
Gray Cast ◽  
Dense Ceramic
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