Processing and Characterization of an Al2O3/TiCN Micro-Nano-Composite Graded Ceramic Tool Material

2012 ◽  
Vol 499 ◽  
pp. 132-137
Author(s):  
Z.J. Gao ◽  
Jun Zhao ◽  
Guang Ming Zheng
Keyword(s):  
Mechanical Properties ◽  
Tool Material ◽  
Nano Particles ◽  
Ceramic Tool ◽  
Nano Composite ◽  
The Core ◽  
Micro Particles ◽  
Ceramic Tool Material ◽  
Graded Ceramic Tool ◽  
Al2o3 Particles

In this study, an Al2O3-based functionally graded ceramic tool material reinforced with TiCN micro-particles and nano-Al2O3 particles was fabricated by using hot-pressing technique. The experimental results showed that optimal mechanical properties were achieved for the composite with the addition of nano-Al2O3 particles increasing from 10vol.% in the surface to 20vol.% in the core, with the flexural strength, fracture toughness and Vicker’s hardness being 1073MPa, 5.99MPa.m1/2 and 21.78GPa, respectively. The microstructure and phase composition of the composites were characterized with SEM, TEM and XRD. It is believed that addition of nano-Al2O3 increasing from the surface to the core, which developed an nano-particles-rich tougher core and a hard Al2O3/TiCN-rich surface, improved the integrated mechanical properties of micro-nano-composite graded ceramic material.

Cutting Performance and Wear Mechanisms of an Al2O3-Based Micro-Nano-Composite Ceramic Tool

2010 ◽  
Vol 443 ◽  
pp. 244-249 ◽  
Author(s):  
Yong Hui Zhou ◽  
Jun Zhao ◽  
Xing Ai
Keyword(s):  
Failure Modes ◽  
Cutting Tools ◽  
Tool Material ◽  
Composite Ceramic ◽  
Cutting Performance ◽  
Nano Particles ◽  
Ceramic Tool ◽  
Nano Composite ◽  
Micro Particles ◽  
1045 Steel

An Al2O3-based composite ceramic cutting tool material reinforced with (W, Ti)C micro-particles and Al2O3 micro-nano-particles was fabricated by using hot-pressing technique, the composite was denoted as AWT. The cutting performance, failure modes and mechanisms of the AWT micro-nano-composite ceramic tool were investigated via continuous turning of hardened AISI 1045 steel in comparison with those of an Al2O3/(W, Ti)C micro-composite ceramic tool SG-4 and a cemented carbide tool YS8. Worn and fractured surfaces of the cutting tools were characterized by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). The results of continuous turning revealed that tool lifetime of the AWT ceramic tool was higher than that of the SG-4 and YS8 tools at all the tested cutting speeds. The longer tool life of the AWT composite ceramic tool was attributed to its synergistic strengthening/toughening mechanisms induced by the (W, Ti)C micro-particles and Al2O3 nano-particles.

Fabrication and Mechanical Properties of Nano-Al2O3 Based Composite Ceramic Tool Material

2011 ◽  
Vol 335-336 ◽  
pp. 736-739
Author(s):  
Xing Li ◽  
Bin Fang ◽  
Xiu Guo Xu ◽  
Chong Hai Xu
Keyword(s):  
Mechanical Properties ◽  
Flexural Strength ◽  
Tool Material ◽  
Composite Ceramic ◽  
Nano Particles ◽  
Ceramic Tool ◽  
Tool Materials ◽  
Technique Effect ◽  
Nano Alumina ◽  
Ceramic Tool Material

The Al2O3(nm)/SiC（μm）/Al2O3（μm）ceramic tool materials were fabricated by the hot-pressing technique. Effect of the compositions on microstructure and mechanical properties is investigated. With nano-particles content decreasing, the flexural strength increased and fine grains can be obtained. When the nano-alumina content is 60wt%, the grain of this sample is fine, the Vickers hardness and flexural strength are 16.24 GPa and 678 MPa, respectively.

Preparation of TiB2/WC/h-BN Micro-Nano Composite Gradient Self-Lubricating Ceramic Tool Material

2013 ◽  
Vol 589-590 ◽  
pp. 307-311 ◽  
Author(s):  
Xiu Guo Xu ◽  
Chong Hai Xu ◽  
Bin Fang ◽  
Chun Lin Wang ◽  
Ming Dong Yi
Keyword(s):  
Mechanical Properties ◽  
Thermal Field ◽  
Tool Material ◽  
Ceramic Matrix ◽  
Dry Machining ◽  
Ceramic Tool ◽  
Nano Composite ◽  
Tool Materials ◽  
Ceramic Tool Material ◽  
Scanning Electron

TiB2/WC/h-BN micro-nano composite gradient self-lubricating ceramic tool material was prepared by vacuum hot-pressing technique. The mechanical properties were tested and compared. The best flexural strength, fracture toughness and Vickers hardness of the tool material were 678MPa, 4.75MPa·m1/2 and 15.1GPa, respectively. The microstructure was analyzed by thermal field emission scanning electron microscope (SEM). TiB2 nanoparticles were obviously observed in the ceramic matrix. It suggested that the developed TiB2/WC/h-BN micro-nano composite gradient self-lubricating ceramic tool materials will have potential application in dry machining.

Mechanical properties, microstructure and crack healing ability of Al2O3/TiC/TiB2/h-BN@Al2O3 self-lubricating ceramic tool material

2021 ◽  
Vol 47 (10) ◽  
pp. 14551-14560
Author(s):  
Shuai Zhang ◽  
Guangchun Xiao ◽  
Zhaoqiang Chen ◽  
Lianggang Ji ◽  
Chonghai Xu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tool Material ◽  
Crack Healing ◽  
Ceramic Tool ◽  
Ceramic Tool Material

Effects of Nano-Al2O3 on the Mechanical Property and Microstructure of Nano-Micro Composite Self-Lubricating Ceramic Tool Material

2013 ◽  
Vol 770 ◽  
pp. 308-311 ◽  
Author(s):  
Ming Dong Yi ◽  
Chong Hai Xu ◽  
Zhao Qiang Chen ◽  
Guang Yong Wu
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Fracture Toughness ◽  
Flexural Strength ◽  
Tool Material ◽  
Ceramic Tool ◽  
Ceramic Tool Material ◽  
Composite Self ◽  
Microstructure And Mechanical Property ◽  
Grain Refinement Strengthening

A new nanomicro composite self-lubricating ceramic tool material was prepared with vacuum hot pressing technique. The effect of nanoAl2O3 powders on the microstructure and mechanical properties of nanomicro composite self-lubricating ceramic tool material was investigated. With the increase of nanoAl2O3 content, the hardness and fracture toughness first up then down. When the nanoAl2O3 content is 4 vol.%, the flexural strength, hardness and fracture toughness reaches 562 MPa, 8.46 MPa·m1/2 and 18.95 GPa, respectively. The microstructure and mechanical property of nanomicro composite self-lubricating ceramic tool material can be improved by the grain refinement strengthening of nanoAl2O3.

Microstructure Simulation and Toughening Mechanism of Ceramic Tool Material

2011 ◽  
Vol 335-336 ◽  
pp. 688-694
Author(s):  
Xiao Hui Zhu ◽  
Chuan Zhen Huang ◽  
Han Lian Liu ◽  
Bin Zou ◽  
Hong Tao Zhu
Keyword(s):  
Mechanical Properties ◽  
Single Phase ◽  
Three Dimensional ◽  
Tool Material ◽  
Ceramic Tool ◽  
Toughening Mechanism ◽  
C Language ◽  
Finite Element Software ◽  
Microstructure Simulation ◽  
Ceramic Tool Material

Based on the microstructure results of Monte Carlo simulation, a three-dimensional grid model is built up, and imported into the finite element software with C++ language to analyze the mechanical properties of ceramic tool material. The stress field and residual stress of single-phase and multiphase ceramics have been analyzed by the computer simulation technology.

Cutting Performance and Tool Failure in Intermittent Turning Processes of an Al2O3-Based Micro-Nano-Composite Ceramic Tool

2012 ◽  
Vol 723 ◽  
pp. 56-61
Author(s):  
Yong Hui Zhou ◽  
Jun Zhao ◽  
Xiao Bin Cui
Keyword(s):  
Failure Modes ◽  
Composite Ceramic ◽  
Cutting Performance ◽  
Nano Particles ◽  
Ceramic Tool ◽  
Nano Composite ◽  
Micro Particles ◽  
Intermittent Turning ◽  
Shock Resistance ◽  
1045 Steel

An Al2O3-based micro-nano-composite ceramic cutting tool material reinforced with (W, Ti)C micro-particles and Al2O3 micro-nano-particles was fabricated by using hot-pressing technique, the composite was denoted as AWT. The cutting performance, failure modes and mechanisms of the AWT micro-nano-composite ceramic tool were investigated via intermittent turning of hardened AISI 1045 steel (44~48 HRC) in comparison with those of an Al2O3/(W, Ti)C micro-composite ceramic tool SG-4 and a cemented carbide tool YS8. Worn and fractured surfaces of the cutting tools were characterized by scanning electron microscopy (SEM). The results of intermittent turning revealed that shock resistance of the AWT ceramic tool was higher than that of the SG-4 and YS8 tools at all the tested cutting speeds. The excellent shock resistance of the AWT composite ceramic tool was attributed to its synergistic strengthening/toughening mechanisms induced by the (W, Ti)C micro-particles and Al2O3 nano-particles.

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