Sintering of MoSi2

1993 ◽  
Vol 322 ◽  
Author(s):  
J.J. Petrovic ◽  
J.S. Idasetima
Keyword(s):  
Sintered Density ◽  
Sintering Temperature ◽  
Low Cost ◽  
Argon Atmosphere ◽  
Fabrication Process ◽  
Sintering Behavior ◽  
Sintering Atmosphere ◽  
Fundamental Nature ◽  
Sintering Time ◽  
Cold Pressed

AbstractDespite the fundamental nature of sintering and its importance as a low cost fabrication process, little information exists on the sintering behavior of the structural silicide Mosi2. The sintering of commercial Mosi2 powders in the range of 1-10 μm was investigated as a function of sintering temperature, sintering time, and sintering atmosphere. Initial densities for uniaxially cold pressed powders were in the range of 47-56% theoretical. A maximum sintered density of 90% of theoretical was achieved for 1 μm Mosi2 powders after sintering for 100 hours at 1600 °C in an argon atmosphere. Larger 10 μm Mosi2 powders achieved lower sintered densities under these conditions. Avenues to optimize the sintering behavior of Mosi2 are suggested.

Effects of Sintering Conditions on Properties of a Warm Compacted Stainless Steel Powder

2012 ◽  
Vol 217-219 ◽  
pp. 483-486
Author(s):  
Mei Yuan Ke
Keyword(s):  
Tensile Strength ◽  
Stainless Steel ◽  
Sintered Density ◽  
Sintering Temperature ◽  
Steel Powder ◽  
Stainless Steel Powder ◽  
Sintering Atmosphere ◽  
Comprehensive Properties ◽  
Ammonia Atmosphere ◽  
Sintering Conditions

Effects of Sintering atmosphere and temperature on properties of warm compacted 410L stainless steel powder were studied. Sintered density, hardness, tensile strength and elongation were measured. Results showed that in order to achieve high comprehensive properties, the optimal sintering temperature was 1230°C for 410L stainless steel powder. At the same sintering temperature, density and hardness sintered in vacuum were much higher than that sintered in cracked ammonia while tensile strength sintered in cracked ammonia were much higher than that in vacuum. When sintered in vacuum at 1230°C, sintered density was 7.45 g•cm-3, hardness was 65 HRB, tensile strength was 410 MPa and elongation was 29.5%. When sintered in cracked ammonia atmosphere at 1230°C, sintered density was 7.26 g•cm-3, hardness was 97 HRB, tensile strength was 515 MPa and elongation was 3.8%.

Sintering behavior and thermoelectric properties of LaCoO3 ceramics with Bi2O3–B2O3–SiO2 as a sintering aid

RSC Advances ◽  
2014 ◽  
Vol 4 (94) ◽  
pp. 51995-52000 ◽  
Author(s):  
Jiao Han ◽  
Ying Song ◽  
Xue Liu ◽  
Fuping Wang
Keyword(s):  
Thermoelectric Properties ◽  
Sintering Temperature ◽  
Low Cost ◽  
Thermoelectric Performance ◽  
Sintering Behavior ◽  
Sintering Aid

Bi2O3–B2O3–SiO2 could remarkably reduce the sintering temperature of LaCoO3 ceramics to 950 oC, providing a low cost and facile approach to improve the sinterability and thermoelectric performance of oxides.

THE SUPERCONDUCTING STUDY OF TlBaCaCu2Oy

1988 ◽  
Vol 02 (09) ◽  
pp. 1095-1101
Author(s):  
JIE YAN ◽  
XIAOMING YANG ◽  
GUANGWEN PEI ◽  
ZHENYU MEN ◽  
DEYING SONG
Keyword(s):  
Sintering Temperature ◽  
X Ray Diffraction ◽  
Unit Cell Parameters ◽  
Sintering Atmosphere ◽  
X Ray ◽  
Cell Parameters ◽  
Sintering Time ◽  
Zero Resistance ◽  
Annealing Rate ◽  
The Stability

The relation of the superconductivity of TlBaCaCu 2 O y to the sintering temperature, sintering time, annealing rate and sintering atmosphere was studied. It was shown that the zero-resistance temperature of the superconductors of the type was up to 118K and the stability was to some extent quite good. Through X-ray diffraction analysis, the TlBaCaCu 2 O y was found to possess two kinds of tetragonal structures. The T co =118 K sample has the unit cell parameters of a=5.446(2)Å, c=35.698(2)Å; while for T co =93.5 K , one has the parameters of a=5.469(2)Å, c=30.051(2)Å, the substitution of Tl, Ba, Ca , by many other elements show that only TlBaMgCu 2 O y and TlMg 2 Cu 2 O y are superconductors and others are insulators.

Sintering and Mechanical Properties of Injection Molded Low Cost Ti Alloys

2013 ◽  
Vol 747 ◽  
pp. 583-586 ◽  
Author(s):  
H. Özkan Gülsoy
Keyword(s):  
Tensile Strength ◽  
Injection Molding ◽  
Sintered Density ◽  
Sintering Temperature ◽  
Low Cost ◽  
Powder Injection ◽  
Thermal Method ◽  
Ti Alloys ◽  
Injection Molded ◽  
Fe Alloys

This study focuses on the injection molding of Ti-Fe alloys. Low cost Ti alloy (Ti-Fe) was manufactured following a powder injection molding route. The Ti and Fe powders were dry mixed and molded with wax based binder. Binder debinding was performed by solvent and thermal method. After dedinding, the samples were sintered at 1100 oC and 1300 oC for 1 h in vacuum. Metallographic studies were conducted to extend densification and the corresponding microstructural changes. The sintered samples were characterized by measuring tensile strength, elongation and hardness. All powder, fracture surfaces of molded and sintered samples were examined using scanning electron microscope. The sintered density, tensile strength and hardness of injection molded Ti-Fe samples increases with increasing sintering temperature.

Densification Behaviors of Fe-TiC System during Spark Plasma Sintering

2007 ◽  
Vol 534-536 ◽  
pp. 509-512 ◽  
Author(s):  
Yong-Hee Lee ◽  
Dong Kyu Park ◽  
Sung Yeal Bea ◽  
In Sup Ahn
Keyword(s):  
Sintering Temperature ◽  
Low Cost ◽  
Cost Effective ◽  
Mass Effect ◽  
Liquid Pool ◽  
Holding Time ◽  
High Mass ◽  
Sintering Time ◽  
Conventional Sintering ◽  
Light Material

The SPS process is a synthetic technique which enables sinter-bonding to occur at low temperature and within a short sintering time. Furthermore, it produces finer grain size than conventional sintering methods. Fe-TiC system is a relatively light material and is one third the size of tungsten carbide and less than half weight of tool steel. It is cost effective when used in Fe-TiC system due to high mass effect with low density and relatively low cost of changing tools and bearings. Fe-TiC system can be machined easily with conventional equipment. In the present work, SPS was conducted at the temperatures of 1200, 1250 and 1300°C at the sintering time of 3, 5 and 10min. As the sintering temperature and holding time increased, the relative density decreased and the hardness reached the lowest at 1250°C. These are attributed to the more pore being generated by liquid Pool at 1250°C and 1300°C. The result of the microstracture observation showed more M6C and MC carbide by liquid Pool as sintering temperature and holding time increased.

Study on High Performance Warm Compacted Fe-2Ni-2Cu-1Mo-1C Powder Metallurgy Materials

2007 ◽  
Vol 353-358 ◽  
pp. 1621-1624
Author(s):  
Zhi Yu Xiao ◽  
Jun Wang ◽  
Shu Hua Luo ◽  
Li Pin Wen ◽  
Yuan Yuan Li
Keyword(s):  
High Performance ◽  
Sintered Density ◽  
Sintering Temperature ◽  
Green Density ◽  
Spring Back ◽  
Mixed Powder ◽  
Sintering Time ◽  
Compact Density ◽  
Dimension Change ◽  
Compacting Pressure

Warm compacting and sintering behaviors of pre-mixed Fe-2Ni-2Cu-1Mo-1C powders were studied. Results showed that green density increased with compacting temperature and then fell slightly; the maximum green density was obtained at about 120°C. Green compact density and spring back effect of the pre-mixed powder increased gradually as the compacting pressure increased. Sintered density first increased and then fell as the temperatures went up under different sintering temperatures for 50 minutes, but the trends of sintering dilatation were first reduced and then increased. Sintered density first reduced and then increased with the prolonged sintering time at 1300°C, but the trends of dimension change after sintering were the very reverse. Tensile strength, elongation and hardness of the warm compacted Fe-2Ni-2Cu-1Mo-1C materials generally increased as sintering temperature and sintering time went up.

The Effect of Sintering on the Properties of Powder Metallurgy (PM) F-75 Alloy

2013 ◽  
Vol 795 ◽  
pp. 573-577 ◽  
Author(s):  
Zuraidawani Che Daud ◽  
Shamsul Baharin Jamaludin
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Powder Metallurgy ◽  
Human Body ◽  
Sintering Temperature ◽  
Physical And Mechanical Properties ◽  
Strength Properties ◽  
Argon Atmosphere ◽  
Medical Implants ◽  
Sintering Time

F-75 (Co-Cr-Mo) alloy are widely used in the production of medical implants because of their excellent strength properties, hardness and also one of the biocompatible materials that very suitable in human body environment. In this research, the effect of sintering in terms of sintering temperature and sintering time has been studied by focusing on the microstructure, physical and mechanical properties of F-75 alloy. The samples were prepared by blending the starting material at 160 rpm for 30 minutes, uniaxially pressing at 500 MPa and sintering in an argon atmosphere at two sintering temperatures (1300°C and 1350°C) for four sintering times (60, 90, 120 and 150 minutes). The results show that the grains and bulk density increased with the increasing of sintering temperature and sintering times. However, opposite results were obtained for apparent porosity, hardness and compressive strength

scholarly journals The Effects of Sintering Temperature and Addition of TiH2 on the Sintering Process of Cu

Materials ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 2594 ◽  
Author(s):  
Huali Hao ◽  
Yanjing Wang ◽  
Hamid Reza Jafari Nodooshan ◽  
Yongyun Zhang ◽  
Shulong Ye ◽  
...  
Keyword(s):  
Sintered Density ◽  
Sintering Temperature ◽  
Reduction Reaction ◽  
Isothermal Treatment ◽  
Sintering Behavior ◽  
Sintering Process ◽  
Reaction Products ◽  
Gas Products ◽  
Material Forming

In this study, effects of sintering temperature and TiH2 on the sintering process of Cu are investigated. During sintering, the oxide in Cu decomposes and generates oxygen, which can become trapped in the material forming closed pores. Therefore, this results in low sintered density. Sintering behavior of Cu can be significantly improved by adding 0.5 wt.% TiH2 which decomposes during sintering, producing hydrogen and effectively reducing the oxide in Cu. Although gas products of the reduction reaction may still be trapped inside the close pores formed near the TiH2 particles and handicap the sintering of Cu, an isothermal treatment at 650 °C can avoid forming close pores. This allows reaction products to dissipate freely from the sample, subsequently increasing its sintered density.

Sintering of Fe-TiC Composite Prepared by Carbothermal Reduction of Hematite and Anatase

2011 ◽  
Vol 471-472 ◽  
pp. 670-673
Author(s):  
Mohd Salihin Hassin ◽  
Palaniandy Samayamutthirian ◽  
Zuhailawati Hussain
Keyword(s):  
Carbothermal Reduction ◽  
Sintering Temperature ◽  
Milled Powder ◽  
High Energy ◽  
Argon Atmosphere ◽  
X Ray Diffraction ◽  
High Energy Ball Mill ◽  
Energy Ball ◽  
Cold Pressed ◽  
And Diffusion

In this study, the formation of Fe-TiC composite through carbothermal reduction of hematite and anatase was investigated with various sintering temperature. Mixture of hematite and anatase powders was milled with graphite for 20 hours in a high energy ball mill in argon atmosphere with composition of Fe-30%volTiC. The as-milled powder was analyzed with X-ray diffraction analysis and the result shows broadening of hematite peaks with disappearance of anatase and graphite peaks due to refinement of powder and diffusion of carbon. The as-milled powder was cold pressed under 200 MPa and sintered in argon atmosphere at various sintering temperature i.e, 1200°C, 1300°C and 1400°C. Higher sintering temperature facilitated reduction of hematite and anatase to produce Fe-TiC composite.

Application of Kaolin Solid Acid Catalyst in the Dethiophene from Coking Benzene

2012 ◽  
Vol 455-456 ◽  
pp. 966-973 ◽  
Author(s):  
Ying Wen Li ◽  
Hong Zhu Ma
Keyword(s):  
Catalytic Activity ◽  
Acid Treatment ◽  
Solid Acid ◽  
Treatment Time ◽  
Sintering Temperature ◽  
Low Cost ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Treatment Temperature ◽  
Sintering Time

A low-cost solid acid catalyst derived from kaolin and sulphuric acid, was utilized for the removal of thiophene from coking benzene. The effect of various factors, such as sintering temperature, sintering time, acid treatment temperature, acid treatment time and the acid content, were investigated to improve the catalytic activity in the removal of thiophene, estimated by UV-vis spectrum. The results showed that kaolin calcined at 973 K for 6 h and refluxed for 3 h in 3 mol/L H2SO4 at 363 K displayed higher thiophene removal efficiency. The highest one was up to 93.05%. In that process, acetic anhydride was appended in order to improve the efficiency of desulfurization.

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