The failure mechanisms of coated precision glass molding tools / Kyriakos Georgiadis ; herausgeber, Prof. Dr.-Ing. Dr.-Ing. E. h. Dr. h. c. Dr. h. c. F. Klocke [and three others].

Format:

Book

Author/Creator:

Georgiadis, Kyriakos, author.

Contributor:

Klocke, F., editor.

Series:

Ergebnisse aus der Produktionstechnik

Language:

English

Subjects (All):

Glass craft.

Glass painting and staining.

Physical Description:

1 online resource (209 p.)

Edition:

1. Auflage.

Place of Publication:

Aachen, [Germany] : Apprimus Verlag, 2015.

Summary:

Molding tools in precision glass molding fail easily, even with protective thin film coatings applied. In this work, various efficient methods for assessing glass-coating interactions are developed, including a new, automated testing rig. Analysis of the testing results provides a better understanding of these mechanisms and how they are influenced by material properties and process parameters, so that the appropriate measures can be taken to prolong the life of the molding tools.

Contents:

Table of Contents; List of Figures; List of Tables; List of Symbols and Abbreviations; 1 Einleitung und Motivation; 1 Introduction and Motivation; 2 State of the Art; 2.1 Glass Molding; 2.1.1 Overview of Process Types; 2.1.2 Quality Specifications; 2.1.3 The Isothermal Precision Glass Molding Process; 2.2 Thin film deposition; 2.3 Protective Coatings for Precision Glass Molding Tools; 2.3.1 Coating Types and Substrates; 2.3.2 Failure Modes of Coated Molding Tools; 2.3.3 Failure Mechanisms of Coated Molding Tools; 2.4 Analysis of Coatings for Glass Molding Tools

2.4.1 Determination of Basic Coating Properties2.4.2 Application-Specific Coating Testing Methods; 2.5 Patents; 2.6 Discussion of the State of the Art; 3 Objective and Description of Work; 4 Analysis of System Components; 4.1 Glass; 4.1.1 Structure and Properties; 4.1.2 Properties of Selected Glass Types; 4.2 Coatings; 4.2.1 Noble Metal Coatings; 4.2.2 Nitride Coatings; 4.3 Substrate Materials; 5 Investigation of Basic Interaction Mechanisms; 5.1 Identification of Possible Interaction Mechanisms; 5.1.1 Changes in Microstructure; 5.1.2 Diffusion; 5.1.3 Phase Transitions

5.1.4 Chemical Reactions5.1.5 Selection of Interaction Mechanisms to be Tested; 5.2 Investigation of the Oxidation Behavior; 5.2.1 Experimental Details; 5.2.2 Evaluation of Test Results; 5.3 Investigation of Diffusion Processes; 5.3.1 Inter-Layer Diffusion; 5.3.2 Substrate-Coating Diffusion; 5.3.3 Glass-Coating Diffusion; 5.4 Summary of the Investigations of Basic Interaction Mechanisms; 6 Accelerated Stress Testing; 6.1 Theoretical Basics; 6.2 Experimental Details; 6.3 Evaluation of Test Results; 6.3.1 Effect of Testing Duration; 6.3.2 Effect of Glass Viscosity; 6.3.3 Effect of Coating Type

6.3.4 Effect of Glass Type6.3.5 Quantitative Analysis of Main Effects and Interactions; 6.4 Modeling of the Results; 6.4.1 Model Definition; 6.4.2 Evaluation of the Results; 6.5 Summary of Accelerated Stress Testing Results; 7 Development of an Automated Life Testing Rig; 7.1 Conception; 7.1.1 Known Life Testing Rigs; 7.1.2 General Goals of the Life Testing Rig; 7.1.3 Definition of Necessary Testing Process Steps; 7.1.4 Determination of Necessary Functions; 7.1.5 Search and Selection of Principle Solutions; 7.2 Implementation; 7.3 Initial Startup and Verification of Test Rig Functionality

7.3.1 Vacuum7.3.2 Temperature Distribution; 7.3.3 Molding Process; 7.3.4 Thermal Cycling; 8 Life Testing; 8.1 Experimental Details; 8.2 Evaluation of Test Results; 8.2.1 Effect of Molding Tool Geometry; 8.2.2 Effect of Glass and Coating Type; 8.3 Comparison with Molding Tests in Production IPGM Machines; 8.4 Summary; 9 Modeling the Failure Mechanisms; 9.1 Root Cause Analysis; 9.2 Predicting failure causes; 9.2.1 Predicting diffusion processes; 9.2.2 Predicting sublimation/deposition processes; 9.2.3 Predicting chemical reactions; 10 Summary and Outlook; 10 Zusammenfassung und Ausblick

Appendix

Notes:

Description based upon print version of record.

Includes bibliographical references.

Description based on online resource; title from PDF title page (ebrary, viewed March 18, 2016).

ISBN:

9783863593711

3863593715