scholarly journals Neutron and X-Ray Diffraction Measurements of Phase Stresses in SiC Particulate Reinforced Aluminum Composite.

1998 ◽  
Vol 47 (7) ◽  
pp. 755-761 ◽  
Author(s):  
Yoshiaki AKINIWA ◽  
Keisuke TANAKA ◽  
Takuya TAKEZONO ◽  
Makoto HAYASHI ◽  
Nobuaki MINAKAWA ◽  
...  
Keyword(s):  
X Ray Diffraction ◽  
Aluminum Composite ◽  
X Ray ◽  
Particulate Reinforced ◽  
Phase Stresses

Synthesis of VN-Reinforced Iron-Based Composite

2012 ◽  
Vol 557-559 ◽  
pp. 240-243 ◽  
Author(s):  
Shi Ping Zhang
Keyword(s):  
In Situ Synthesis ◽  
Synthesis Process ◽  
Homogeneous Distribution ◽  
Vanadium Nitride ◽  
X Ray Diffraction ◽  
Nitrogen Gas ◽  
X Ray ◽  
Fine Size ◽  
Particulate Reinforced

Vanadium nitride (VN) particulate reinforced Fe-based composite was produced with ferrovanadium, Ferromolybdenum, ferrochromium and nitrogen gas by in situ synthesis process. The microstructure of the composites was characterized by X-ray diffraction and scanning electron microscopy. With the help of differential thermal analysis, reaction process of Fe-V-N system was discussed. The results show that the composite consists of VN and α-Fe phase. VN particles exhibit fine size and homogeneous distribution in Fe matrix. Formation of VN at 674°C is due to the reaction between ferrovanadium and nitrogen gas.

Microstructure and Formation Mechanism of Titanium Carbide Reinforced Ferrous Composite

2012 ◽  
Vol 457-458 ◽  
pp. 611-615
Author(s):  
Jing Wang ◽  
Si Jing Fu ◽  
Rong Gao
Keyword(s):  
Electron Microscopy ◽  
Thermal Analysis ◽  
Titanium Carbide ◽  
Formation Mechanism ◽  
X Ray Diffraction ◽  
Iron Matrix ◽  
Microstructural Study ◽  
X Ray ◽  
Particulate Reinforced ◽  
Scanning Electron

This study dealt with the formation mechanism and microstructure of titanium carbide particulate reinforced Fe-based composite. The microstructure of the composite was characterized by scanning electron microscopy (SEM), the microstructural study reveled that the TiC particles were distributed uniformly in the iron matrix, and TiC particles had various morphology. The formation mechanism of titanium carbide was also investigated by differential thermal analysis (DTA) and X-ray diffraction(XRD). The experimental results indicated that titanium carbide formed at 1138.2°C.

Effect of TiO2 Addition on the Microstructures and Mechanical Properties of γ-TiAl Intermetallics

2011 ◽  
Vol 211-212 ◽  
pp. 205-208 ◽  
Author(s):  
Jian Feng Zhu ◽  
Wen Wen Yang ◽  
Jiang Jing Wang
Keyword(s):  
Mechanical Properties ◽  
Strengthening Mechanism ◽  
Reaction Synthesis ◽  
Hot Press ◽  
X Ray Diffraction ◽  
X Ray ◽  
Tial Intermetallics ◽  
Universal Properties ◽  
Microstructures And Mechanical Properties ◽  
Particulate Reinforced

Al2O3 Particulate reinforced TiAl based composites have been fabricated by hot press-assisted reaction synthesis (HPRS) method using Ti, Al and TiO2 as starting materials. Effect of the TiO2 addition on the microstructures and mechanical properties of the TiAl/Al2O3 composites were detailedly investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and universal properties tests. The results show that the TiO2 addition has evident effect on phase composition and microstructure of the TiAl intermetallics, as a result, the mechanical properties of TiAl composites are improved. When the TiO2 content is 10.58 wt %, the flexural strength and fracture toughness reach the maximum values of 537.34 MPa and 9.38 MPa·m1/2, which are increased by 70% and 23%, respectively. The strengthening mechanism is also discussed.

scholarly journals Effect of Diffusion Annealing Temperature on the Formation Process and Properties of a Carbon–Aluminum Composite Layer on Pure Titanium

Materials ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 1994
Author(s):  
Hongzhan Li ◽  
Youping Ma ◽  
Zhengxian Li ◽  
Shouchang Ji ◽  
Yanfeng Wang ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Composite Layer ◽  
Pure Titanium ◽  
Titanium Substrate ◽  
Annealing Treatment ◽  
Diffusion Annealing ◽  
X Ray Diffraction ◽  
Aluminum Composite ◽  
X Ray ◽  
Glow Plasma

A carbon–aluminum composite layer was prepared on the surface of pure titanium by double glow plasma carburizing, magnetron sputtering aluminizing, and vacuum-diffusional annealing treatment. The microstructure, phase composition, and properties of the composite layer obtained at different annealing temperatures were investigated by scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and the ball-on-disc wear method. Results showed that the layer contained a mixture of TiAl3, Ti2Al5, and TiC phases at 650 °C for 6 h, which can significantly enhance the hardness and wear resistance of pure titanium. The layer exhibited a higher hardness of around 1231 HV0.1, a lower friction coefficient of 0.33, and lower wear volumes of 0.018 mm3 than those of the titanium substrate.

Properties of SiC/Fe Composites Prepared by Coating Process and Powder Metallurgy Method

2008 ◽  
Vol 368-372 ◽  
pp. 852-854 ◽  
Author(s):  
Gang Shao ◽  
Hai Long Wang ◽  
Fang Shao ◽  
Kai Li ◽  
Rui Zhang
Keyword(s):  
Powder Metallurgy ◽  
Coating Layer ◽  
Powder Metallurgy Method ◽  
Coating Process ◽  
X Ray Diffraction ◽  
X Ray ◽  
Metallic Compounds ◽  
Particulate Reinforced ◽  
Sintering Method ◽  
Scanning Electron

SiC particulate-reinforced Fe composites were prepared by a powder metallurgy (PM) and conventional atmospheric sintering method. X-ray diffraction (XRD), scanning electron microscopy (SEM) techniques were used to characterize the obtained composites. The coating layer of Cu on SiC particles can suppress the reaction between SiC and Fe until 1250oC. The maximum microhardness of 283 Hv appears at near 1250oC. Substantial reaction occurs at above 1250oC, which leads to the deterioration in the microstructure and related properties. The inter-metallic compounds of FeSi or Fe2Si were detected which contributed to the enhancement of the interface between SiC and Fe.

Research on Different Heat Transfer Characteristics of the Dirt on the Pipe

2014 ◽  
Vol 644-650 ◽  
pp. 5179-5182
Author(s):  
Li Bai ◽  
Tan Liu
Keyword(s):  
Stainless Steel ◽  
Photoelectron Spectroscopy ◽  
Copper Alloy ◽  
Pcr Amplification ◽  
X Ray Diffraction ◽  
Aluminum Composite ◽  
X Ray ◽  
Alloy Tube ◽  
Composite Pipe ◽  
Stainless Steel Pipe

In this study, the dirt adhered on the tubes of different materials (copper alloy tube, stainless steel pipe, polyethylene-aluminum composite pipe) were studied by the scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, PCR amplification, DGGE electrophoresis analyzers. Experimental results show that the microorganism in dirt on the copper alloy tube is mainly shuttle-type bacteria, and the distribution is dense. Stainless steel pipe’s dirt colony is assembling with long bacilli and cocci, polyethylene-aluminum composite pipe’s dirt is the large bacilli and density cocci. Three kinds of dirt in the pipe contains inorganic crystals with SiO2 and CaCO3, and the same type of element, but the content is differences, polyethylene-aluminum composite pipe have greater richness of microbial species, a copper alloy tube’s dirt is of little microorganisms.

Study on Fabrication and Properties of In Situ Si and Al2O3 Particulate Reinforced Composites

2014 ◽  
Vol 576 ◽  
pp. 33-37
Author(s):  
Song Li Zhang ◽  
Zhen Kun Zhang ◽  
Yuao Zhao
Keyword(s):  
Reaction System ◽  
Reinforced Composites ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Performance Requirements ◽  
Particulate Reinforced Composites ◽  
Particulate Reinforced ◽  
Small Thermal Expansion

The properties of in-situ (Si+Al2O3)/Al composites fabricated from Al-SiO2 reaction system are investigated by X-Ray Diffraction, Scanning Electron Microscope and Differential Scanning Calorimetry technologies. The results indicate that the Si phase is plate shaped and the Al2O3 phase is mainly round and ellipsoidal. The composite prepared by this method have performances of low density, high conductivity and small thermal expansion coefficient (<10×10-6/K) which meets the performance requirements of electronic packaging materials.

Microstructural Evolution of Monolithic Fuel Foils During Processing

2014 ◽  
Vol 70 (a1) ◽  
pp. C729-C729
Author(s):  
Donald Brown ◽  
Maria Okuniewski ◽  
Bjorn Clausen ◽  
Thomas Sisneros ◽  
Levente Balogh
Keyword(s):  
Dislocation Density ◽  
Residual Stresses ◽  
Weight Percent ◽  
High Energy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Bonded Materials ◽  
Processing Step ◽  
Phase Stresses

Residual stresses are expected in monolithic, aluminum clad uranium 10 weight percent molybdenum (U-10Mo) nuclear fuel plates because of the large mismatch in thermal expansion between the two bonded materials. Previous high energy x-ray diffraction measurements successfully profiled the residual stresses in the U-10Mo, but were unable to probe either the Al cladding or the 15micron Zr diffusion prevention barrier due to poor grain statistics. Neutron diffraction, with its inherently more divergent incident be alleviates this problem and, moreover, allowed for the determination of the dislocation density and texture in all three phases. Several samples were examined as a function of processing step and the phase stresses, dislocation density and texture are monitored with respect to the processing conditions.

Intermetallic Compound Formation on Solder Alloy/Cu-Substrate Interface Using Lead-Free Sn-0.7Cu/Recycled-Aluminum Composite Solder

2012 ◽  
Vol 620 ◽  
pp. 105-111 ◽  
Author(s):  
Flora Somidin ◽  
Mohd Arif Anuar Mohd Salleh ◽  
Rafezi Ahmad Khairel
Keyword(s):  
Intermetallic Compound ◽  
Composite Solder ◽  
Lead Free ◽  
X Ray Diffraction ◽  
Aluminum Composite ◽  
Compound Formation ◽  
Cu Substrate ◽  
X Ray ◽  
Intermetallic Compound Formation ◽  
Solder Composite

Feasibility of using recycled-Aluminum (re-Al) as reinforcement particulates in Sn-0.7Cu is assessed by powder technology method, whereby re-Al particulates are produced from discarded aluminum beverage cans. This paper focuses on the intermetallic compound (IMC) formation study between the fabricated solder composite on Cu-substrate. Throughout this study, four different composition of Sn-0.7Cu/re-Al (0.0, 3.0, 3.5, 4.0 wt.%) were studied. X-ray diffraction (XRD) was used to analyze the IMCs phase formation between the interfaces. New IMC phase of Cu9Al4was detected beside Cu6Sn5and Cu3Sn in the composite solder samples. However, Sn-0.7Cu/3.0re-Al showed least formation of brittle IMCs compared to the monolithic solder.

X-Ray Measurement of Triaxial Residual Stress in Ceramic Composites and Coating

1992 ◽  
Vol 36 ◽  
pp. 473-480
Author(s):  
Keisuke Tanaka
Keyword(s):  
Residual Stress ◽  
Coefficient Of Thermal Expansion ◽  
Diffraction Method ◽  
Ceramic Composites ◽  
Surface Finishing ◽  
Al Alloy ◽  
Alloy Composite ◽  
X Ray Diffraction ◽  
X Ray ◽  
Phase Stresses

AbstractThe X-ray diffraction method was used to measure the triaxial state of residual stresses in each phase in the following four kinds of composites; ZrO2/Al2O3 composite, WC-Co alloy, SiC/Al-alloy composite, and TiC/SiC coating. The residual macrostress and microstress were determined from the phase stresses by using the rule of mixture. The effects of heat treatment and surface finishing on the residual stress were studied. The measured value of the thermal residual stress was compared with the theoretical prediction based on the mismatch of the coefficient of thermal expansion.

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