Download or read book The Influence of Titanium on Metal ceramic Interfaces written by Elad Nussbaum and published by . This book was released on 2011 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Metal Ceramic Interfaces written by M. Rühle and published by Elsevier. This book was released on 2013-10-22 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: As engineering materials and structures often contain a metal or metallic alloy bonded to a ceramic, the resultant interface must be able to sustain mechanical forces without failure. They also play an important role in oxidation or reduction of materials. The workshop on 'Bonding, Structure and Mechanical Properties of Metal/Ceramic Interfaces' was held in January 1989 within the Acta/Scripta Metallurgica conference series. It drew together an international collection of 70 scientists who discussed a wide range of issues related to metal-ceramic interfaces. The sessions were divided into 7 categories: structure and bonding, chemistry at interfaces, formation of interfaces, structure of interfaces, thermodynamics/atomistics of interface fracture, mechanics of interface cracks, and fracture resistance of bimaterial interfaces. Within these headings attention was paid to grain boundaries, the influence of chemical processes on the behaviour of interfaces, diffusion bonding, characterization of fracture, and crack propagation by fatigue and by stress corrosion. The book presents a useful reference source for materials scientists, physicists, chemists, and mechanical engineers who are concerned with the roles and properties of interfaces.

Download or read book Joining of Titanium written by Robert Edward Monroe and published by . This book was released on 1967 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report supplies information on joining processes applicable to titanium and its alloys in sheet metal applications, primarily related directly to airframe construction. Although the material presented here does not cover all titanium joining processes, and omits such processes as plasma-arc, submerged-arc, electroslag, flash, and high-frequency resistance welding, the data presented cover materials up to 2-inches thick in some cases and the report should be useful to anyone seeking titanium joining information. The joining processes covered fall into five categories: welding, brazing, metallurgical bonding (diffusion and deformation bonding), adhesive bonding, and mechanical fastening. The fusion welding processes that are discussed in detail include gas tungsten arc, gas metal arc, arc spot, and electron beam. The resistance processes give extended coverage are spot, roll spot, and seam welding. (Author).

Download or read book Mechanisms and Parameters Affecting Adhesion for Titanium ceramic Interfaces Created by Cold Spray written by Sara Imbriglio and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "A study is conducted on the formation of Ti/Al2O3 and Ti/SiC metal/ceramic interfaces by cold spray. There is a focus on the Ti/Al2O3 interface given its better adhesion as compared to Ti/SiC. Independent variables in the cold spray process including the type of ceramic, the powder and substrate morphology and the powder particle impact velocity are considered. Interfaces are formed by cold spraying single metallic powder particles (i.e., splats) onto the ceramic substrates. Micromechanical testing by a splat adhesion test is conducted to determine splat adhesion strength.The deposition of Ti powder particles onto a polished Al2O3 substrate is compared to the deposition, at identical spray conditions, onto SiC with a comparable surface roughness. For Al2O3, Ti powder particles bonded near the periphery of the splat by forming a continuous and strong bond. These results demonstrate the importance of the formation of a material jet at impact by adiabatic shear instabilities on bond formation with a ceramic. For deposition onto SiC, the presence of fragments of Ti in the periphery of the splat remaining on the substrate demonstrates that the material properties of the ceramic play a significant role in bond formation. In addition to the ceramic’s intrinsic material properties, surface roughness also influences deposition. The deposition of Ti onto Al2O3 with a high surface roughness rendered a lower splat adhesion strength than when deposited onto a substrate with a lower surface roughness. Mechanical interlocking contributes to bonding onto the Al2O3 substrate with a higher surface roughness, while chemico-physical factors primarily contribute to bonding on the smooth substrate.Large fluctuations in velocity for the same cold spray conditions are challenging when analyzing single splats. To isolate the effect of velocity on the deposition of single splats, a laser-induced projectile impact test (LIPIT) is used. By LIPIT, the impact velocity is recorded by a high-speed camera and is used to determine the critical velocity for deposition. The critical velocity for deposition of Ti onto Al2O3 is identified to be approximately 580 m/s. For deposited splats, velocity is correlated to the powder deformation. The deformation of splats is quantified by use of the flattening ratio. The effect of an increase in velocity beyond the critical velocity is investigated. Splat adhesion strength decreases with increasing flattening ratio due to fracture in the ceramic and rebound forces.The effect of powder morphology is investigated by splat adhesion testing and post-test characterization of spherical powder and irregular powder with a coral-like morphology. To reduce the effect of ceramic substrate surface morphology, smooth single crystal sapphire substrates are used. The transparent nature of single crystal sapphire substrates allows for the use of an in situ splat adhesion test. For the two spray conditions used, the spherical powder splat consistently has an interface pore in its center which acts as a crack initiation site. Several interface cracks are seen when depositing irregular powder at low velocity; tamping at higher velocities due to the shape of the powder significantly improves adhesion strength leading to a continuous interface.The abovementioned work was useful in understanding the effect of independent variables in the process. To further understand bond formation between a metal and a ceramic by high-speed impact, high resolution transmission electron microscopy in addition to energy-dispersive X-ray spectroscopy and electron energy loss spectroscopy is used. An interfacial interaction layer with atomic intermixing and nanosized precipitates is identified"--

Download or read book Surfaces and Interfaces in Ceramic and Ceramic Metal Systems written by Joseph Pask and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 733 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 17th University Conference on Ceramics, which also was the 7th LBL/MMRD International Materials Symposium, was held on the campus of the University of California at Berkeley from July 28 to August 1, 1980. It was devoted to the subject of surfaces and interfaces in ceramic and ceramic-metal systems. The program was timely and of great interest, as indicated by the large number of contributed papers, which included contributions from ten foreign countries. These proceedings are divided into the following categories dealing with the chemistry and physics of interfaces: calculations of interface/surface states, characterization of surfaces and inter faces, thermodynamics of interfaces, influence of surface and inter faces on selected ceramic processes, grain boundary structures, effects of grain boundaries on deformation and fracture, interfacial phenomena, formation of interfaces, development of adhesion, and reactions at interfaces. A number of papers deal specifically with the Si-Si02 interface, which probably has received more attention than any other because of its importance in the electronics industry. This coverage fulfills the principal objective of the symposium which was to explore and assess the current fundamental understand ing of interfaces and surfaces. A parallel objective of the symposium was fulfilled by a group of papers dealing with the correlation of interfacial characteris tics with mechanical behavior. This group includes papers dealing with the adherence of dissimilar materials at interfaces.

Download or read book Interfacial Reactions Between Metals and Ceramics and Their Influence on the Mechanical Properties of Metal ceramic Interfaces written by Yung-Cheng Lu and published by . This book was released on 1994 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Surfaces and Interfaces in Ceramic and Ceramic Metal Systems written by Joseph Pask and published by Springer. This book was released on 2012-07-10 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 17th University Conference on Ceramics, which also was the 7th LBL/MMRD International Materials Symposium, was held on the campus of the University of California at Berkeley from July 28 to August 1, 1980. It was devoted to the subject of surfaces and interfaces in ceramic and ceramic-metal systems. The program was timely and of great interest, as indicated by the large number of contributed papers, which included contributions from ten foreign countries. These proceedings are divided into the following categories dealing with the chemistry and physics of interfaces: calculations of interface/surface states, characterization of surfaces and inter faces, thermodynamics of interfaces, influence of surface and inter faces on selected ceramic processes, grain boundary structures, effects of grain boundaries on deformation and fracture, interfacial phenomena, formation of interfaces, development of adhesion, and reactions at interfaces. A number of papers deal specifically with the Si-Si02 interface, which probably has received more attention than any other because of its importance in the electronics industry. This coverage fulfills the principal objective of the symposium which was to explore and assess the current fundamental understand ing of interfaces and surfaces. A parallel objective of the symposium was fulfilled by a group of papers dealing with the correlation of interfacial characteris tics with mechanical behavior. This group includes papers dealing with the adherence of dissimilar materials at interfaces.

Download or read book Metal Ceramic Interfaces Relationships Between Structures Chemistry and Interfaces written by and published by . This book was released on 1991 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interface fracture resistance measurements have been conducted on metal/ceramic interfaces with and without reaction products. Both ductile and brittle interface fracture have been documented. Some effects of residual stress have also been investigated. The influence of thermal expansion misfit on the mechanical behavior of metal/ceramic bonded systems has been shown to be strongly governed by the sign of the misfit strain, its magnitude, the yield strength of the metal and to be subject to substantial geometric effects. In some cases, the misfit causes interface failure, while in other, cracking occurs in the ceramic. Generally, misfit has detrimental effects on bond strength, but in special cases, the bond strength can actually be improved. Reaction products exhibit a wide variety of fracture behaviors. In some cases, the reaction products are brittle and subject to residual stress, leading to low fracture energy interfaces governed by the fracture resistance of the reaction product. In other cases ductile reaction products occur, resulting in good bond properties and fracture energies that increase as the reaction product layer thickness increases. Stress corrosion has been found to occur at oxide/metal interfaces, leading to substantial reductions in the fracture resistance. The phenomenon is governed by water vapor and is similar to, but more pronounced than, that found in oxides.

Download or read book Study of Metal ceramic Interactions at Elevated Temperatures written by and published by . This book was released on 1955-07 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tailoring the Structure and Mechanical Properties of Metal ceramic Interfaces written by Fuh-Sheng Shieu and published by . This book was released on 1990 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Atomic Mechanisms of Flow and Fracture at Metal Ceramic Interfaces and Their Role in the Design of Metal Matrix Composites written by and published by . This book was released on 1996 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes new and significant results that can be applied in the microstructure design for optimum mechanical performance of metal-ceramic composites and laminates. There are three elements to these recommendations: (1) the design of the atomic structure of metal-ceramic interfaces, (2) identification of the critical length scale in the two phase microstructure, and (3) prediction of the microstructural conditions under which the thermal conductivity of the composite becomes significantly influenced by the thermal boundary resistance of interfaces. In the first topic we show that the beneficial effect of titanium interlayers at a copper/alumina interface is accomplished with only about one monolayer; with further increase in the titanium interlayer thickness having an insignificant effect on the interfacial strength. In the second topic we show that the metal ligament size is the key microstructural parameter in controlling the flow stress, the fracture stress and the fracture toughness of metal-ceramic composites. The metal ligament size is important because dislocation activity in the metal, which produces pile ups against the interface, is the critical event in flow and fracture of composites. In the third area we show that the interfacial thermal boundary resistance plays a dominant role in the overall thermal conductivity of the composite when the microstructural scale becomes smaller than about 1um.

Download or read book Metal ceramic Interfaces written by Manferd Ruhle and published by . This book was released on 1990 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mechanical Properties of Metal ceramic Interfaces written by Rachel Susan Goldman and published by . This book was released on 1992 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Introduction to Metal Matrix Composites written by T. W. Clyne and published by Cambridge University Press. This book was released on 1993 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal matrix composites constitute a new class of materials, now starting to make a major industrial impact in fields as diverse as aerospace, automotives and electronics. This book gives a comprehensive, integrated coverage of these materials, including the background to analytical-, experimental-, production and application-oriented aspects. Clear pictorial descriptions are given of the basic principles governing various properties and characteristics; these encompass mechanical, thermal, electrical, environmental and wear behaviour. Coverage also extends to material processing and component fabrication aspects and to a survey of commercial usage. This book is aimed primarily at scientists, engineers, production managers and all those involved in research on new materials in general, and metal matrix composites in particular, but may also be suitable for use as a text in beginning graduate and advanced undergraduate courses.

Download or read book Ceramic Interfaces 2 written by Han-Ill Yoo and published by Routledge. This book was released on 2001 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: First published in 2001. Routledge is an imprint of Taylor & Francis, an informa company.

Download or read book Designing Interfaces for Technological Applications written by S. D. Peteves and published by Elsevier Science & Technology. This book was released on 1989 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Defect Interactions at Metal Ceramic Interfaces in Thin Film Multilayers written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Of metal-ceramic multilayer deformation: (1) In nanolayered Al/TiN, Al layers grow in a twin orientation with the underlying TiN/Al layers favored by N-terminated TiN layers; (2) The shear strength of Al/TiN interface varies significantly depending on whether the interface is Ti or N terminated; (3) 2 nm Al - 2 TiN multilayers exhibit unusual mechanical properties as revealed by compression testing - (a) High maximum flow strength of 4.5 GPa, which is significantly higher than hardness (6 GPa) divided by a factor of 3, (b) Extraordinarily high strain hardening rates in Al nanolayers (16-35 GPa, ≈ E/2 to E/4), (c) Co-deformability of the TiN nanolayers with Al (confirmed by TEM on nanoindents) to plastic strains in excess of 5%.