An Overview of Potential Titanium Aluminide Composites in Aerospace Applications

1992 ◽  
Vol 273 ◽  
Author(s):  
James M. Larsen ◽  
William C. Revelos ◽  
Mary L. Gambone
Keyword(s):  
High Temperature ◽  
Air Force ◽  
Titanium Aluminide ◽  
High Performance ◽  
Matrix Composites ◽  
Enabling Technology ◽  
Aerospace Vehicles ◽  
Aerospace Applications ◽  
Monotonic Properties ◽  
Temperature Time

ABSTRACTHigh-temperature, light-weight materials represent enabling technology in the continued evolution of high-performance aerospace vehicles and propulsion systems being pursued by the U.S. Air Force. In this regard, titanium aluminide matrix composites appear to offer unique advantages in terms of a variety of weightspecific properties at high temperatures. However, a key requirement for eventual structural use of these materials is a balance of mechanical properties that can be suitably exploited by aircraft and engine designers without compromising reliability. An overview of the current capability of titanium aluminide composites is presented, with an effort to assess the balance of properties offered by this class of materials. Emphasis is given to life-limiting cyclic and monotonic properties and the roles of high-temperature, time-dependent deformation and environmental effects. An attempt is made to assess the limitations of currently available titanium aluminide composites with respect to application needs and to suggest avenues for improvements in key properties.

Microstructural characterization of plasma-processed Ti-Al metal matrix composites

1989 ◽  
Vol 47 ◽  
pp. 552-553
Author(s):  
M. G. Burke ◽  
M. N. Gungor ◽  
M. A. Burke
Keyword(s):  
High Temperature ◽  
Titanium Aluminide ◽  
Plasma Processing ◽  
Microstructural Characterization ◽  
High Temperature Strength ◽  
Matrix Composites ◽  
Intermetallic Matrix ◽  
Long Time ◽  
Strength And Stiffness ◽  
Intermetallic Matrix Composites

Intermetallic matrix composites are candidates for ultrahigh temperature service when light weight and high temperature strength and stiffness are required. Recent efforts to produce intermetallic matrix composites have focused on the titanium aluminide (TiAl) system with various ceramic reinforcements. In order to optimize the composition and processing of these composites it is necessary to evaluate the range of structures that can be produced in these materials and to identify the characteristics of the optimum structures. Normally, TiAl materials are difficult to process and, thus, examination of a suitable range of structures would not be feasible. However, plasma processing offers a novel method for producing composites from difficult to process component materials. By melting one or more of the component materials in a plasma and controlling deposition onto a cooled substrate, a range of structures can be produced and the method is highly suited to examining experimental composite systems. Moreover, because plasma processing involves rapid melting and very rapid cooling can be induced in the deposited composite, it is expected that processing method can avoid some of the problems, such as interfacial degradation, that are associated with the relatively long time, high temperature exposures that are induced by conventional processing methods.

scholarly journals Intrinsic Self-Healing Epoxies in Polymer Matrix Composites (PMCs) for Aerospace Applications

Polymers ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 201
Author(s):  
Stefano Paolillo ◽  
Ranjita K. Bose ◽  
Marianella Hernández Santana ◽  
Antonio M. Grande
Keyword(s):  
High Performance ◽  
Polymer Matrix Composites ◽  
Critical Issue ◽  
General Description ◽  
Self Healing ◽  
Matrix Composites ◽  
Testing Procedures ◽  
Aerospace Applications ◽  
Polymer Properties ◽  
Healing Efficiency

This article reviews some of the intrinsic self-healing epoxy materials that have been investigated throughout the course of the last twenty years. Emphasis is placed on those formulations suitable for the design of high-performance composites to be employed in the aerospace field. A brief introduction is given on the advantages of intrinsic self-healing polymers over extrinsic counterparts and of epoxies over other thermosetting systems. After a general description of the testing procedures adopted for the evaluation of the healing efficiency and the required features for a smooth implementation of such materials in the industry, different self-healing mechanisms, arising from either physical or chemical interactions, are detailed. The presented formulations are critically reviewed, comparing major strengths and weaknesses of their healing mechanisms, underlining the inherent structural polymer properties that may affect the healing phenomena. As many self-healing chemistries already provide the fundamental aspects for recyclability and reprocessability of thermosets, which have been historically thought as a critical issue, perspective trends of a circular economy for self-healing polymers are discussed along with their possible advances and challenges. This may open up the opportunity for a totally reconfigured landscape in composite manufacturing, with the net benefits of overall cost reduction and less waste. Some general drawbacks are also laid out along with some potential countermeasures to overcome or limit their impact. Finally, present and future applications in the aviation and space fields are portrayed.

Damage Mechanisms in Polymer Matrix Composites in Extreme Environments

2006 ◽  
Vol 324-325 ◽  
pp. 663-666 ◽  
Author(s):  
Maciej S. Kumosa
Keyword(s):  
High Temperature ◽  
Polymer Matrix ◽  
High Voltage ◽  
Polymer Matrix Composites ◽  
Rocket Engine ◽  
Extreme Environments ◽  
Combined Cycle ◽  
Matrix Composites ◽  
Aerospace Applications ◽  
Liquid Propellant Rocket Engine

In this work, potential problems with the application of polymer matrix composites (PMC) in extreme environments [1] is discussed. Then, two specific examples of the applications of PMCs in high voltage [2-7] and high temperature [8-15] situations are evaluated. The first example deals with damage evolution in high voltage composite insulators [2-7] with PMC rods subjected to a combined action of extreme mechanical, electrical and environmental stresses. These insulators are widely used in transmission line and substation applications around the world. Subsequently, advanced high temperature graphite/polyimide composites [8-15] are evaluated for aerospace applications. The composite investigated in this project were used to manufacture and successfully test a Rocket Based Combined Cycle (RBCC) third-generation, reusable liquid propellant rocket engine, which is one possible engine for a future single-stage-to-orbit vehicle [8].

Development of CSS-421™, A High Performance Carburizing Stainless Steel for High Temperature Aerospace Applications

2009 ◽  
pp. 374-374-17 ◽  
Author(s):  
HI Burrier ◽  
CM Tomasello ◽  
SA Balliett ◽  
JL Maloney ◽  
DL Milam ◽  
...  
Keyword(s):  
Stainless Steel ◽  
High Temperature ◽  
High Performance ◽  
Aerospace Applications

Advanced Materials for Extreme Environment Aerospace Actuators

2016 ◽  
Vol 856 ◽  
pp. 119-124
Author(s):  
Luca Papini ◽  
Chris Gerada ◽  
Georgios E. Kampitsis ◽  
Antonios G. Kladas
Keyword(s):  
High Temperature ◽  
Numerical Simulations ◽  
High Performance ◽  
Experimental Validation ◽  
Extreme Environment ◽  
Advanced Materials ◽  
Electrical Machine ◽  
Electromagnetic Actuators ◽  
Aerospace Applications ◽  
Important Impact

In this paper the important impact of high temperature withstand on performance of electromagnetic actuators for aerospace applications is illustrated. Particular materials enabling high performance and increased reliability in such applications are analysed both through numerical simulations and experimental validation. Specific examples outline advancements in electrical machine technologies for this class of problems.

Electrodeposited Cobalt-Tungsten as a High-Temperature Diffusion Barrier for Graphite-Fiber/Nickel Composites

1993 ◽  
Vol 318 ◽  
Author(s):  
N. S. Wheeler ◽  
D. S. Lashmore
Keyword(s):  
High Temperature ◽  
Diffusion Barrier ◽  
Alloy Coating ◽  
Matrix Composites ◽  
Graphite Fiber ◽  
Nickel Metal ◽  
Aerospace Applications ◽  
Temperature Diffusion ◽  
Graphite Fibers ◽  
Nickel Composites

ABSTRACTThere is a growing demand for advanced composites which can maintain their structural strength in high-temperature environments, particularly for aerospace applications. The use of graphite fiber/nickel metal matrix composites would be desirable if the deterioration of mechanical properties resulting from interdiffusion of carbon and nickel at temperatures in excess of 600°C could be avoided. The present research concerns an electrodeposited cobalt alloy coating containing 5-10.5 at-% tungsten, which was designed to serve as a diffusion barrier between graphite fibers and a nickel matrix. The resulting graphite/Co-W/Ni composite was tested under various time/temperature conditions, and the coating was shown to inhibit diffusion for up to 24 hr at 800°C. Annealed and unannealed coated fibers were analyzed by x-ray diffraction and by transmission electron microscopy The as-deposited coating was found to contain both h.c.p. and f.c.c. cobalt, whereas only f.c.c. was observed after annealing at 1100°C for 1.5 hours. WC was found at the coating/fiber interface.

High-temperature creep of sapphire-fibre/titanium-aluminide-matrix composites

2001 ◽  
Vol 44 (10) ◽  
pp. 2463-2469 ◽  
Author(s):  
S.T. Mileiko ◽  
K.B. Povarova ◽  
V.P. Korzhov ◽  
A.V. Serebryakov ◽  
A.A. Kolchin ◽  
...  
Keyword(s):  
High Temperature ◽  
Titanium Aluminide ◽  
High Temperature Creep ◽  
Matrix Composites ◽  
Temperature Creep

Advanced Metal Matrix Composites

1988 ◽  
Vol 125 ◽  
Author(s):  
C. Robert Crowe
Keyword(s):  
Metal Matrix Composites ◽  
Metal Matrix ◽  
High Performance ◽  
Space Structure ◽  
Matrix Composites ◽  
Materials Development ◽  
Specific Strength ◽  
Aerospace Applications ◽  
Development Goals ◽  
Higher Temperature

ABSTRACTAdvanced metal matrix composites are emerging as materials of construction for high performance aerospace applications. The thrust is to develop high specific strength and high specific modulus ultra-lightweight composites using Al or Mg as matrix materials for space structure applications, and for higher temperature applications, to develop materials using various aluminides as matrix materials. This paper presents an overview of the methodology used to develop advanced MMC's and discusses the problems and limitations faced in achieving the composite materials development goals.

scholarly journals Microstructure and reaction mechanisms at γ-TiAl brazed interfaces

2009 ◽  
Vol 15 (S3) ◽  
pp. 67-68
Author(s):  
A. Guedes ◽  
A. M. P. Pinto ◽  
E. W. Sequeiros ◽  
M. F. Vieira ◽  
F. Viana
Keyword(s):  
Reaction Mechanisms ◽  
Titanium Aluminide ◽  
High Performance ◽  
Aircraft Engines ◽  
Aerospace Vehicles ◽  
Tial Alloys ◽  
Automotive Engines ◽  
Effective Use ◽  
Titanium Aluminide Alloys ◽  
Strength Retention

AbstractTitanium aluminide alloys based on the γ-TiAl intermetallic compound are emerging as potential materials for high performance applications on aircraft engines components, aerospace vehicles and automotive engines, owing to their low density, high specific stiffness, excellent strength retention at high temperature and good creep and oxidation resistance. The development of adequate techniques to join γ-TiAl alloys, either to themselves or to other materials, is a key issue regarding the effective use of these alloys. Understanding of the reaction mechanisms that promote bonding is mandatory when optimization of the joining procedure is envisaged.

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