Study on the In Situ Fabricated Titanium Nitride-Based Ceramic Cutting Tool Materials Reinforced by Titanium Diboride

2012 ◽  
Vol 500 ◽  
pp. 679-684 ◽  
Author(s):  
Qiang Shi ◽  
Han Lian Liu ◽  
Chuan Zhen Huang ◽  
Bin Zou
Keyword(s):  
Composite Materials ◽  
Titanium Nitride ◽  
Titanium Diboride ◽  
Cutting Tool ◽  
New Technology ◽  
Reaction Products ◽  
X Ray Diffraction ◽  
Ceramic Cutting Tool ◽  
Cutting Tool Materials

The titanium diboride reinforced titanium nitride-based ceramic cutting tool composite materials were fabricated by a new technology namely in situ synthesis followed by hot-pressed sintering. The experimental results showed that the highest density and the best mechanical properties of the composite material were obtained when the content of Ni was 5wt%. X-ray diffraction (XRD) was used to identify the phases of the composite. Microstructures of the composite were observed by means of scanning electron microscope (SEM). It is concluded that the sintered material was pure, no harmful reaction products was found; with the increase of Ni content, the proportion of short rod-like TiB2 increased, fracture toughness of the composite materials were improved because lots of TiB2 were pulled out; bridging phenomenon of short rod-like particles and metal particles were observed in the crack propagating process. The main toughening mechanisms of the composites were deflection and bridging of the crack as well as grains pulling out.

Microstructure and Mechanical Properties of Al2O3-TaCw Ceramic Cutting Tool Materials

2013 ◽  
Vol 797 ◽  
pp. 172-176
Author(s):  
Guo Long Zhao ◽  
Chuan Zhen Huang ◽  
Han Lian Liu ◽  
Bin Zou ◽  
Hong Tao Zhu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Cutting Tool ◽  
Reduction Process ◽  
Interface Debonding ◽  
Transgranular Fracture ◽  
Tool Materials ◽  
Ceramic Cutting Tool ◽  
Cutting Tool Materials ◽  
Fracture Interface

Three kinds of in-situ growth TaC whiskers toughening Al2O3 matrix ceramic cutting tool materials were prepared by two steps, which were in-situ synthesis of TaC whiskers in Al2O3 matrix powder by carbothermal reduction process and hot pressing of the composites respectively. The preparation process, microstructure, mechanical properties and toughening mechanisms of the composites were investigated. The in-situ synthesized TaC whiskers had a diameter of 0.1-0.5μm and an aspect ratio of 10-30. The composite containing 20vol.% TaC had the optimal comprehensive mechanical properties with flexural strength of 638MPa, fracture toughness of 6.5MPa·m1/2 and hardness of 17.4GPa. The improvement of the mechanical properties was attributed to the TaC particles and whiskers which induced the toughening and strengthening effects such as crack deflection, crack branching, grain and whisker fracture, interface debonding and whisker pullout. The fracture mode of the composites was the combination of intergranular and transgranular fracture which also improved the mechanical properties of the composites.

Mechanical Properties and Microstructure of Self-Lubricating Ceramic Cutting Tool Materials

2004 ◽  
Vol 471-472 ◽  
pp. 221-224 ◽  
Author(s):  
Jian Xin Deng ◽  
Tong Kun Cao ◽  
Jia Lin Sun
Keyword(s):  
Mechanical Properties ◽  
Cutting Tool ◽  
Solid Lubricants ◽  
Polished Surface ◽  
Ceramic Tool ◽  
Tool Materials ◽  
Ceramic Cutting Tool ◽  
Micro Cracks ◽  
The Difference ◽  
Cutting Tool Materials

Al2O3/TiC ceramic tool materials with the addition of solid lubricants such as BN and CaF2 were produced by hot pressing. Effect of the solid lubricants on the microstructure and mechanical properties has been studied. Results showed that AlN phase resulted from the reaction of Al2O3 with BN was formed in Al2O3/TiC/BN composite after sintering. Significant micro-cracks resulted from the residual stress owing to the difference in the thermal expansion coefficient were found on the polished surface, and caused large mechanical properties degradation. While Al2O3/TiC/CaF2 composite showed higher flexural strength, fracture toughness, and hardness compared with that of Al2O3/TiC/BN composite owing its porosity absent and finer microstructure.

In-situ fabricated TiB2 particle-whisker synergistically toughened Ti(C, N)-based ceramic cutting tool material

2015 ◽  
Vol 28 (2) ◽  
pp. 338-342 ◽  
Author(s):  
Hanlian Liu ◽  
Qiang Shi ◽  
Chuanzhen Huang ◽  
Bin Zou ◽  
Liang Xu ◽  
...  
Keyword(s):  
Cutting Tool ◽  
Tool Material ◽  
Tib2 Particle ◽  
Ceramic Cutting Tool

Wear and design of ceramic cutting tool materials

Wear ◽  
1989 ◽  
Vol 133 (2) ◽  
pp. 309-321 ◽  
Author(s):  
S.-T. Buljan ◽  
S.F. Wayne
Keyword(s):  
Cutting Tool ◽  
Tool Materials ◽  
Ceramic Cutting Tool ◽  
Cutting Tool Materials

Preparation and Wear Properties of (Al3Zr+ZrB2)P/2124 Composites Material with In Situ Process

2012 ◽  
Vol 616-618 ◽  
pp. 1736-1740
Author(s):  
Lei Jiao ◽  
Yu Tao Zhao ◽  
Zhong Zhong Zhang ◽  
Yan Wei Yang ◽  
Ming Rui Zhang
Keyword(s):  
Magnetic Field ◽  
Composite Materials ◽  
Sliding Friction ◽  
Testing Machine ◽  
Test Methods ◽  
X Ray Diffraction ◽  
Wear Properties ◽  
Matrix Metal ◽  
The Matrix

With pulse magnetic field, it is use 2124-K2ZrF6-KBF4 as matrix metal to produce chemical reaction to gain (Al3Zr+ZrB2) p/2124 composite materials in this paper. In this paper, For the sake of researching the microstructure, the morphology, the size and the matrix distribution characteristics of the reinforced grain of prepared composite material , those test methods are used, such as optical microscopy, scanning electron microscope, X-ray diffraction analysis and so on. We will research the magnetic field strength how to influence size and distribution of Al3Zr +ZrB2 particle and the abrasion performance of (Al3Zr+ZrB2)P/2124 composite materials in the room temperature. Wear experiment is proceeding in the CETR UMT 3-V the testing machine and sliding friction is friction way with pin-disc but without lubricant, then analyzes the wear mechanism.

Investment Casting of Titanium Matrix Composites

2005 ◽  
Vol 475-479 ◽  
pp. 2551-2554 ◽  
Author(s):  
Si Young Sung ◽  
Keun Chang Park ◽  
Myoung Gyun Kim ◽  
Young Jig Kim
Keyword(s):  
In Situ Synthesis ◽  
Matrix Composites ◽  
Reaction Products ◽  
X Ray Diffraction ◽  
Titanium Matrix ◽  
Titanium Matrix Composites ◽  
X Ray ◽  
Conventional Casting ◽  
Electron Probe Micro Analyzer

The aim of the present work is to investigate the possibility of in-situ synthesis and net-shape of the titanium matrix composites (TMCs) using a casting route. From the scanning electron microscopy (SEM), electron probe micro-analyzer (EPMA), X-ray diffraction (XRD) and thermodynamic calculations, the spherical TiC and needle like TiB reinforced hybrid TMCs could be obtained by the conventional casting route between titanium and B4C. No melts-mold reaction could be possible between (TiC+TiB) hybrid TMCs and the SKKU mold, since the mold is composed of interstitial and substitutional reaction products. Not only the sound in-situ synthesis but also the economic net-shape of TMCs could be possible by conventional casting route.

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