scholarly journals Surface Finishing Technology in Aerospace Industry. Surface Preparation Technology for Adhesive Bonding on Aircraft.

1998 ◽  
Vol 49 (2) ◽  
pp. 138-142
Author(s):  
Noriaki SUGAHARA
Keyword(s):  
Adhesive Bonding ◽  
Aerospace Industry ◽  
Surface Preparation ◽  
Surface Finishing ◽  
Preparation Technology

Internal Plasma Spray Process for Cylinder Bores in Automotive Industry

1997 ◽  
Author(s):  
G. Barbezat ◽  
S. Keller ◽  
G. Wuest
Keyword(s):  
Plasma Spray ◽  
Automotive Industry ◽  
Surface Preparation ◽  
Cost Effective ◽  
Cylinder Block ◽  
Future Application ◽  
Surface Finishing ◽  
Major Advance ◽  
Plasma Gun ◽  
Spray Process

Abstract In the Automotive Industry the need for lower manufacturing costs, the use of less strategic material, and easier, faster, and more flexible routes for manufacturing are being looked for continuously. The environmental concerns relating to the use of galvanic coatings is growing. This has led to the examination of the plasma-powder spray process for the application of coatings for surface modification. In the area of engine cylinder bore coatings a major advance is taking place in the use of a rotating plasma spray device. This paper covers the use of a plasma-powder spray process for the coating of aluminum-silicon cylinder block bores using a rotating plasma gun capable of producing coatings of reliable microstructure and integrity. Properties and microstructures of the applied coatings will be presented. Test results will be shown that the necessary bond strength of the coating can be achieved without the use of a bond coat. Surface preparation prior to coating and surface finishing methods after coating will also be discussed. Experience in Europe, Japan and the Unites States will be discussed which show that the plasma-powder spray process offers a performance proven and cost effective solution for the coating of cylinder bores, thus demonstrating the future application potential for this technology.

Adherend Surface Preparation for Structural Adhesive Bonding

1991 ◽  
pp. 203-237 ◽  
Author(s):  
H. M. Clearfield ◽  
D. K. McNamara ◽  
Guy D. Davis
Keyword(s):  
Adhesive Bonding ◽  
Surface Preparation ◽  
Structural Adhesive

Surface Pretreatment of Fiber-Reinforced Plastics via VUV Radiation

2017 ◽  
Vol 742 ◽  
pp. 70-73
Author(s):  
Christoph Schmüser ◽  
Kira Rosanova ◽  
Christopher Dölle
Keyword(s):  
Surface Energy ◽  
Power Plants ◽  
Adhesive Bonding ◽  
Surface Preparation ◽  
Transport Sector ◽  
Contact Method ◽  
Fiber Reinforced ◽  
Release Agent ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics

Fiber-reinforced plastics (FRP) are of great importance for the transport sector, the aerospace industry, for wind power plants, in the building sector and in the field of sports and leisure applications. Optimization of the adhesive bonding process for FRP structures, especially the surface preparation prior to bonding, will be of a central importance in forthcoming expansion of FRP use. In this connection the key problem depends on the FRP polymer matrix. In the case of duroplastic matrix the main problem is the presence of release agent on the surface of joining components. For the thermoplastic matrix such as polypropylene (PP), the main problems are the low surface energy and the inertness of its surface. Conventional pretreatment methods, such as manual grinding, shall be replaced by energetic radiation technics like VUV lamps (vacuum ultraviolet spectral range: 100 – 200 nm). This approach is a non-contact method, characterized by high treatment homogeneity and material-saving properties, combined with no further fibers to be released. The surface of the thermoplastics is activated by the incorporation of oxygen, release agent contamination on the thermoset is cleaned or modified [1 - 8]. The results of the VUV surface activation of PP and CFRP with regard to the incorporation of functional groups, increase of surface energy, matrix degradation and the adhesion increase of adhesive bonds are presented. In addition, studies on the release agent coating and the release agent modification by VUV radiation are presented. The work is completed by considerations concerning possibilities to accelerate the process (in particular, wavelength dependence, influence of an inert gas or the moisture content). Finally, an evaluation of the VUV pretreatment is carried out on the basis of two specific applications.

scholarly journals Influence of Glassy Carbon Surface Finishing on Its Wear Behavior during Precision Glass Moulding of Fused Silica

Materials ◽  
2019 ◽  
Vol 12 (5) ◽  
pp. 692 ◽  
Author(s):  
Tim Grunwald ◽  
Dennis Patrick Wilhelm ◽  
Olaf Dambon ◽  
Thomas Bergs
Keyword(s):  
High Precision ◽  
Glassy Carbon ◽  
Mechanical Load ◽  
Wear Behavior ◽  
Tool Material ◽  
Surface Preparation ◽  
Fused Silica ◽  
Carbon Surface ◽  
Wear Behaviour ◽  
Surface Finishing

Laser technology has a rising demand for high precision Fused Silica components. Precision Glass Moulding (PGM) is a technology that can fulfil the given demands in efficiency and scalability. Due to the elevated process temperatures of almost 1400 °C and the high mechanical load, Glassy Carbon was qualified as an appropriate forming tool material for the moulding of Fused Silica. Former studies revealed that the tools’ surface finishing has an important influence on wear behaviour. This paper deals with investigation and analysis of surface preparation processes of Glassy Carbon moulds. In order to fulfil standards for high precision optics, the finishing results will be characterised by sophisticated surface description parameters used in the optics industry. Later on, the mould performance, in terms of wear resistance, is tested in extended moulding experiments. Correlations between the surface finish of the Glassy Carbon tools and their service lifetime are traced back to fundamental physical circumstances and conclusions for an optimal surface treatment are drawn.

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