scholarly journals High-temperature mechanical properties of ZrB2/SiC/Si3N4 ceramic tool materials with dual composite architectures

2021 ◽  
Author(s):  
Jingbao Zhang ◽  
Guangchun Xiao ◽  
Mingdong Yi ◽  
Zhaoqiang Chen ◽  
Jingjie Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Ceramic Tool ◽  
Si3n4 Ceramic ◽  
Tool Materials ◽  
High Temperature Mechanical Properties

High temperature mechanical properties of Al2O3/TiC micro–nano-composite ceramic tool materials

2013 ◽  
Vol 39 (8) ◽  
pp. 8877-8883 ◽  
Author(s):  
Zengbin Yin ◽  
Chuanzhen Huang ◽  
Bin Zou ◽  
Hanlian Liu ◽  
Hongtao Zhu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Composite Ceramic ◽  
Ceramic Tool ◽  
Nano Composite ◽  
Tool Materials ◽  
High Temperature Mechanical Properties

Effect of Nano-Scale TiN on the Mechanical Properties and Microstructure of Si3N4 Based Ceramic Tool Materials

2006 ◽  
Vol 315-316 ◽  
pp. 154-158 ◽  
Author(s):  
Bin Zou ◽  
Chuan Zhen Huang ◽  
Jun Wang ◽  
Bing Qiang Liu
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Flexural Strength ◽  
Sintering Temperature ◽  
Ceramic Tool ◽  
Si3n4 Ceramic ◽  
Tool Materials ◽  
Nano Scale ◽  
Sintering Conditions ◽  
Si3n4 Matrix

An effect of nano-scale TiN grains on the mechanical properties and microstructure of Si3N4 based ceramic tool materials is investigated at the different sintering temperature. Compared to monolithic Si3N4 ceramic tool materials, the sintering temperature is decreased and mechanical properties is enhanced when only one percent of nano-scale TiN in term of mass is added into the Si3N4 matrix. The optimum mechanical properties are achieved when Si3N4/TiN nanocomposites tool materials were sintered at the sintering conditions of 1650, 30MPa and holding time of 40min. The flexural strength, fracture toughness and hardness are 1018.2MPa, 8.62MPa⋅m1/2 and 14.58GPa respectively. SEM micrographs indicate that microstructure is composed of the elongated and equiaxed β-Si3N4 grains, and some nano-scale TiN grains are enveloped into matrix grains.

Effect of Mechanical Properties of Al2O3/(W,Ti)C Ceramic Tool Material on Its Tribological Characterization

2021 ◽  
Author(s):  
Limei Wang ◽  
Xiaorui Shi ◽  
Bo Wang ◽  
Hanlian Liu ◽  
Chuanzhen Huang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Friction Coefficient ◽  
High Speed ◽  
Cutting Tools ◽  
Tool Material ◽  
Ceramic Tool ◽  
Tool Materials ◽  
Ceramic Tool Material ◽  
Different Temperatures

Abstract Ceramic cutting tools are mainly used in high-speed dry machining, thus the tool material is in high temperature friction state with the workpiece material during cutting. The tribological characterizations have a direct impact on the cutting performance of the tool. Therefore, tribological characterizations of two kinds of ceramic tool materials with different mechanical properties against hardened steel H13 were compared at the same temperature, one material is Al2O3/(W,Ti)C/Ni with Ni(marked as AWTN), another is Al2O3/(W,Ti)C without Ni(marked as AWT). Also, the variation of tribological characterizations of AWT ceramic tool material with different temperatures was emphatically investigated. The results showed that the average friction coefficients of AWT and AWTN decreased with the increase of sliding speed under the same load, and the friction coefficient of AWT was lower than that of AWTN. Although AWTN material had better flexural strength and fracture toughness than AWT at ambient temperature, yet better hardness of AWT material both at room temperature and high temperature led to the lower friction coefficient and lower wear rate, indicating that the hardness had a greater impact on the wear of ceramic tool materials. The friction coefficient of AWT decreased with the increase of load and increased with the increase of temperature. The wear mechanism of Al2O3/(W,Ti)C ceramic tool material was different at different temperatures. The conclusion of this research had important guiding significance for the selection of cutting tools and cutting parameters in order to improve the machining quality.

TEM Studies of Grain Boundary Films in Si3N4 Ceramics

1991 ◽  
Vol 49 ◽  
pp. 930-931
Author(s):  
H.-J. Kleebe ◽  
J.S. Vetrano ◽  
J. Bruley ◽  
M. Rühle
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Silicon Nitride ◽  
Hot Isostatic Pressing ◽  
Amorphous Film ◽  
Liquid Phase Sintering ◽  
Second Phase ◽  
High Temperature Mechanical Properties ◽  
Triple Points ◽  
Boundary Films

It is expected that silicon nitride based ceramics will be used as high-temperature structural components. Though much progress has been made in both processing techniques and microstructural control, the mechanical properties required have not yet been achieved. It is thought that the high-temperature mechanical properties of Si3N4 are limited largely by the secondary glassy phases present at triple points. These are due to various oxide additives used to promote liquid-phase sintering. Therefore, many attempts have been performed to crystallize these second phase glassy pockets in order to improve high temperature properties. In addition to the glassy or crystallized second phases at triple points a thin amorphous film exists at two-grain junctions. This thin film is found even in silicon nitride formed by hot isostatic pressing (HIPing) without additives. It has been proposed by Clarke that an amorphous film can exist at two-grain junctions with an equilibrium thickness.

BERYLCO NICKEL ALLOY 440

Alloy Digest ◽  
1975 ◽  
Vol 24 (9) ◽  
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Nickel Alloy ◽  
High Strength ◽  
Heat Treating ◽  
Electronic Components ◽  
High Temperature Mechanical Properties ◽  
Temperature Performance ◽  
Solution Treated ◽  
Complex Shapes

Abstract BERYLCO NICKEL ALLOY 440 is an age-hardenable nickel-beryllium-titanium alloy that offers high strength, excellent spring properties outstanding formability, good high-temperature mechanical properties, and resistance to corrosion and fatigue. Complex shapes can be produced in the solution-treated (soft) condition and then aged to a minimum tensile strength of 215,500 psi. It is used for mechanical and electrical/electronic components in the temperature range -320 to 800 F. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-94. Producer or source: Kawecki Berylco Industries Inc.. Originally published September 1964, revised September 1975.

HASTELLOY ALLOY S

Alloy Digest ◽  
1973 ◽  
Vol 22 (1) ◽  
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Heat Treating ◽  
High Temperature Alloy ◽  
Excellent Thermal Stability ◽  
Cabot Corporation ◽  
High Temperature Mechanical Properties ◽  
Temperature Performance ◽  
Resistance To Oxidation ◽  
Nickel Base

Abstract HASTELLOY alloy S is a nickel-base high-temperature alloy having excellent thermal stability, good high-temperature mechanical properties and excellent resistance to oxidation up to 2000 F. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-184. Producer or source: Stellite Division, Cabot Corporation.

High temperature mechanical properties of Inconel 718 pulsed Nd–YAG laser welds

2006 ◽  
Vol 23 (1) ◽  
pp. 29-37 ◽  
Author(s):  
G.D. Janaki Ram ◽  
A. Venugopal Reddy ◽  
K. Prasad Rao ◽  
G. Madhusudhan Reddy
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Inconel 718 ◽  
Yag Laser ◽  
High Temperature Mechanical Properties ◽  
Laser Welds
Sign in / Sign up

Export Citation Format

Share Document