Effect of Ni content and its particle size on electrical resistivity and flexural strength of porous SiC ceramic sintered at low-temperature using clay additive

2021 ◽  
Author(s):  
Muhammad Shoaib Anwar ◽  
Syed Zaighum Abbas Bukhari ◽  
Jang-Hoon Ha ◽  
Jongman Lee ◽  
In-Hyuck Song
Keyword(s):  
Particle Size ◽  
Electrical Resistivity ◽  
Low Temperature ◽  
Flexural Strength ◽  
Ni Content ◽  
Sic Ceramic ◽  
Porous Sic

Low Temperature Fabrication and Characterization of Porous SiC Ceramics Using Polycarbosilane as Binder

2007 ◽  
Vol 336-338 ◽  
pp. 1090-1092 ◽  
Author(s):  
Qing Song Ma ◽  
Xiao Dong Yu
Keyword(s):  
Particle Size ◽  
Low Temperature ◽  
Fracture Surface ◽  
Flexural Strength ◽  
Sic Ceramics ◽  
Fabrication And Characterization ◽  
Porous Sic

Polycarbosilane (PCS) and SiC powders, in which PCS acted as binder, were adopted as starting materials to fabricate porous SiC ceramics. During pyrolysis, PCS experienced an organicinorganic transformation and bonded SiC powders at a low temperature of 1273K. The flexural strength of porous SiC ceramics increased with increasing PCS content and shaping pressure, while the porosity decreased with increasing the PCS content, shaping pressure and particle size of SiC powders. The fracture surface of porous SiC ceramics was observed.

Effect of Pore-Forming Processing on the Gas Permeability and Flexural Strength of Porous SiC Ceramics

2010 ◽  
Vol 105-106 ◽  
pp. 623-626 ◽  
Author(s):  
Lei Fan ◽  
Hong Jie Wang ◽  
Zhi Hao Jin
Keyword(s):  
Particle Size ◽  
Flexural Strength ◽  
Gas Permeability ◽  
Pore Former ◽  
Sic Ceramics ◽  
Porous Sic

The porous SiC ceramics were prepared by two methods of pore-forming. The gas permeability and flexural strength of the porous SiC ceramics prepared by different ways were investigated. The porous SiC ceramics prepared by particle stacking have evenly pore distrubution; the gas permeability was greatly increased with the particle size increasing while the porous SiC ceramics were kept a higher flexural strength. The pore-former also can be used to form large pores to increase the gas permieability. However, these unevenly distribution large pores lead to a deterioration in flexural strength.

EVANOHM

Alloy Digest ◽  
1960 ◽  
Vol 9 (4) ◽  
Keyword(s):  
Electrical Resistivity ◽  
Low Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Temperature Coefficient ◽  
Base Alloy ◽  
Nickel Base Alloy ◽  
Temperature Coefficient Of Resistance ◽  
High Electrical Resistivity ◽  
Nickel Base

Abstract EVANOHM is a nickel-base alloy having low temperature coefficient of resistance and high electrical resistivity. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on joining. Filing Code: Ni-57. Producer or source: Wilbur B. Driver Company.

INVAR M93

Alloy Digest ◽  
2008 ◽  
Vol 57 (1) ◽  
Keyword(s):  
Fracture Toughness ◽  
Low Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Low Temperatures ◽  
Bend Strength ◽  
Temperature Performance ◽  
Ni Content ◽  
Precision Alloys ◽  
Ni Alloy

Abstract Invar is an Fe-Ni alloy with 36% Ni content that exhibits the lowest expansion of known metals from very low temperatures up to approximately 230 deg C (445 deg F). Invar M93 is a cryogenic Invar with improved weldability. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear and bend strength as well as fracture toughness and fatigue. It also includes information on low temperature performance as well as forming and joining. Filing Code: FE-143. Producer or source: Metalimphy Precision Alloys.

Phase transformation and Raman spectra in BaTiO3 nanocrystals

2002 ◽  
Vol 718 ◽  
Author(s):  
Jian Yu ◽  
X. J. Meng ◽  
J.L. Sun ◽  
G.S. Wang ◽  
J.H. Chu
Keyword(s):  
Particle Size ◽  
Phase Transformation ◽  
Low Temperature ◽  
Long Range ◽  
Lattice Expansion ◽  
Inversion Symmetry ◽  
Range Interaction ◽  
Cooperative Phenomena ◽  
Long Range Interaction ◽  
Hydrothermal Methods

AbstractIn this paper, size-induced ferroelectricit yweakening, phase transformation, and anomalous lattice expansion are observed in nanocrystalline BaTiO3 (nc-BaTiO3) deriv ed b y low temperature hydrothermal methods, and they are w ellunderstood using the terms of the long-range interaction and its cooperative phenomena altered by particle size in covalen t ionic nanocrystals. In cubic nc-BaTiO3, five modes centerd at 186, 254, 308, 512 and 716 cm-1 are observed Raman active in cubic nanophase, and they are attributed to local rhombohedral distortion breaking inversion-symmetry in cubic nanophase. The254 and 308 cm-1 modes are significantly affected not only by the concentration of hydroxyl defects, but also their particular configuration. And the 806 cm-1 modes found to be closely associated with OH - absorbed on grain boundaries.

Mechanical Response of Porous Copper Manufactured by Lost Carbonate Sintering Process

2007 ◽  
Vol 539-543 ◽  
pp. 1863-1867 ◽  
Author(s):  
X.F. Tao ◽  
Li Ping Zhang ◽  
Y.Y. Zhao
Keyword(s):  
Particle Size ◽  
Flexural Strength ◽  
Relative Density ◽  
Mechanical Response ◽  
Compaction Pressure ◽  
Absorption Capacity ◽  
Energy Absorption Capacity ◽  
Three Point Bending ◽  
Porous Copper ◽  
The Impact

This paper investigated the mechanical response of porous copper manufactured by LCS under three-point bending and Charpy impact conditions. The effects of the compaction pressure and K2CO3 particle size used in producing the porous copper samples and the relative density of the samples were studied. The apparent modulus, flexural strength and energy absorption capacity in three-point bending tests increased exponentially with increasing relative density. The impact strength was not markedly sensitive to relative density and had values within 7 – 9 kJ/m2 for the relative densities in the range 0.17 – 0.31. The amount of energy absorbed by a porous copper sample in the impact test was much higher than that absorbed in the three-point bending test, impling that loading strain rate had a significant effect on the deformation mechanisms. Increasing compaction pressure and increasing K2CO3 particle size resulted in significant increases in the flexural strength and the bending energy absorption capacity, both owing to the reduced sintering defects.

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