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.

Abrasive Wear Characteristics of In Situ TiC-Reinforced Iron Matrix Surface Gradient Composites

2012 ◽  
Vol 535-537 ◽  
pp. 81-85 ◽  
Author(s):  
Liang Liang Wang ◽  
Yun Hua Xu ◽  
Li Sheng Zhong
Keyword(s):  
Titanium Carbide ◽  
Abrasive Wear ◽  
Wear Testing ◽  
Synthesis Process ◽  
Titanium Plate ◽  
Iron Matrix ◽  
Surface Gradient ◽  
Matrix Surface ◽  
Carbide Particles

An in-situ synthesis process combining an infiltration casting with a following heating treatment was applied to fabricate special titanium carbide (TiC) particles-reinforced iron matrix surface gradient composites in this article. The microstructure and wear-resistance of the titanium carbide particle reinforced iron matrix surface gradient composites were researched by using differential scanning calorimetry, X-ray diffraction, scanning electron microscopy and abrasive wear testing. The results showed that two materials had been reacted completely between the titanium plate and gray cast iron, and the titanium carbide particles distributed in the matrix with the thickness of 266.7 μm reaction layer. The average size of titanium carbide between titanium plate and iron matrix was about 1-2μm. Under the same condition, the wear mechanism of titanium carbide particles-reinforced iron matrix surface gradient composites appeared as: micro-ploughing, micro-cutting and broken titanium carbide.

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

Infiltration Casting and In Situ Fabrication of NbC Particulates – Reinforced Iron Matrix Composites

2011 ◽  
Vol 284-286 ◽  
pp. 269-272
Author(s):  
Li Sheng Zhong ◽  
Yun Hua Xu ◽  
Na Na Wang ◽  
Xiao Jie Liu ◽  
Fang Xia Ye ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Volume Fraction ◽  
Niobium Carbide ◽  
Wear Testing ◽  
Matrix Composites ◽  
X Ray Diffraction ◽  
Iron Matrix ◽  
Micro Cracks ◽  
Particulate Reinforced

Niobium carbide (NbC) particulates -reinforced iron matrix composites were prepared by in- situ fabrication method combining an infiltration casting with a subsequent heat treatment. The microstructure and wear-resistance of NbC particulate-reinforced iron matrix composites were studied using scanning electron microscopy, X-ray diffraction, and wear testing. The results indicate that at 1172 °C for 3 hours NbC particulate-reinforced iron matrix composites were fabricated, and the size of NbC reinforcement was 0.3–3.5 μm. The relative wear resistance of the composites was 5.4 times higher than that of gray cast iron under a 20 N load. This was achieved at 22 % NbC volume fraction. Wear of the composites manifests as grooves, broken carbide particulates and some micro-cracks.

In Situ Production of Fe-TiC Surface Composite

2011 ◽  
Vol 335-336 ◽  
pp. 80-85 ◽  
Author(s):  
Jing Wang ◽  
Yi Chao Ding ◽  
Hong Cheng ◽  
Yi San Wang
Keyword(s):  
Wear Resistance ◽  
Oxidation Resistance ◽  
Volume Fraction ◽  
Gray Iron ◽  
Iron Matrix ◽  
Good Oxidation Resistance ◽  
Surface Composite ◽  
Matrix Surface ◽  
Tic Particulates

TiC particulates reinforced iron matrix surface composite was produced by cast technique and in-situ synthesis technique. The surface composite was investigated from thermodynamics, microstructure, wear-resistance and oxidation-resistance. The results show TiC particles whose volume fraction is about 40% exhibit fine size in iron matrix on the surface composite. An excellent metallurgy-bond is observed between the surface composite and the gray iron. Fe-TiC surface composite shows good oxidation-resistance at 900°C and great wear-resistance under condition of dry sliding.

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

Microstructure and Wear Properties of In Situ Production of (Fe,Cr)7C3 Particulate Bundles Reinforced Iron Matrix Composites

2013 ◽  
Vol 652-654 ◽  
pp. 64-68 ◽  
Author(s):  
Jing Lai Tian ◽  
Fang Xia Ye ◽  
Li Sheng Zhong ◽  
Yun Hua Xu
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
Treatment Time ◽  
Heat Treatment Time ◽  
Wear Testing ◽  
Dry Sliding Wear ◽  
Matrix Composites ◽  
Wear Properties ◽  
Iron Matrix

In-situ production of (Fe,Cr)7C3 particulate bundles-reinforced iron matrix composites were prepared by infiltration casting between Cr wires and white cast iron at 1200°C plus subsequent heat treatment. The composites prepared under different heat treatment time were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), macrohardness test and pin-on-disc wear resistance test. The results show that the composite is mainly consist of (Fe,Cr)7C3 carbides and γ-Fe. The area of the particulate bundles gradually increases with the increase of heat treatment time, the microstructure evolved from eutectic to hypoeutectic, and the morphologies of the reinforcements present chrysanthemum-shaped, granular and intercrystalline eutectics, respectively. The (Fe,Cr)7C3 particulate bundles reinforced composite has high macrohardness and excellent wear resistance under dry sliding wear testing conditons.

Study on Microstructure of Vanadium and Chromium-Carbide Reinforced Fe Matrix Surface Composite

2011 ◽  
Vol 399-401 ◽  
pp. 425-429
Author(s):  
Jing Wang ◽  
Si Jing Fu ◽  
Yi Chao Ding ◽  
Yi San Wang
Keyword(s):  
Chromium Carbide ◽  
In Situ Synthesis ◽  
X Ray Diffraction ◽  
Iron Matrix ◽  
X Ray ◽  
Surface Composite ◽  
Matrix Surface ◽  
Scanning Electron ◽  
Cast Technique

Vanadium and chromium-carbide particulates reinforced iron matrix surface composite was produced by cast technique and in-situ synthesis technique. The microstructure of the surface composite was studied by scanning electron microscope(SEM) and X-ray diffraction(XRD). The results show that the production of an iron matrix surface composite reinforced by vanadium and chromium-carbide particulates using the process is feasible. Spherical VC particles and strip-chunky Cr7C3 are generated in the surface composite. An excellent metallurgy-bond is observed between the surface composite and the mater-steel.

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

Research on Microstructure and Wear Resistance of (Fe,Cr)7C3/Fe Surface Gradient Composite

2015 ◽  
Vol 1120-1121 ◽  
pp. 559-563
Author(s):  
Chong Wang ◽  
Fang Xia Ye ◽  
Li Sheng Zhong ◽  
Ying Lin Yan ◽  
Yu Jun Lai ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
Volume Fraction ◽  
Subsurface Layer ◽  
Composite Layer ◽  
High Volume ◽  
Synthesis Process ◽  
X Ray Diffraction ◽  
Surface Gradient

In this study, the (Fe,Cr)7C3 particles strengthened gradient composite was produced by in situ synthesis process with subsequent heat treatment from gray cast iron (HT300) and high purity chrome plate. The microstructure, phase composition and wear resistance of the composite were studied by scanning electron microscopy (SEM), X-ray diffraction (XRD) and scratch tester. The results showed that the thickness of the gradient layer was about 758 μm after heat treatment at 900 °Cfor 4 h. And it can be divided into three areas depending on microstructure. The outermost layer which was ~60 μm of thickness, was the dense ceramic layer with high volume fraction of (Fe,Cr)7C3 ~90%. No obvious grain boundaries were observed. The subsurface layer was the particles dispersed layer, which was ~525 μm of thickness, with the volume fraction of (Fe,Cr)7C3 decreased to 70%. The lowermost layer was ferrite, with about 173 μm thickness. A good metallurgical bond generated between the composite layer and matrix. The depth and the width of surface scratch increased with the raising loads from 0 to 100 N, and the cracks mainly included micro-crack, tiny dens crack, mixture crack and through-wall crack. The (Fe,Cr)7C3 particles were broken and scraped when the load exceeded 80 N.

Sign in / Sign up

Export Citation Format

Share Document