Search Results for very low pressure plasma spraying

New thermal spray methods optimized for the production of functional coatings are bridging the gap between traditional thermal spraying and thin-film deposition technologies. Two such methods, one known alternately as very low pressure plasma spraying (VLPPS) or plasma spray-physical vapor deposition (PS-PVD) and one called thin-film thermal spray chemical vapor deposition (CVD), are briefly reviewed here.

Thermal spray technology is increasingly being used in alternative energy applications such as solid-oxide fuel cells, solar panels, and wind and hydropower turbines.

Thermal spray plays an important but latent role in many energy generation applications. Strong R&D commitment is required to further expand its technological envelope. This article addresses future directions in the use of thermal spray coating technologies in the energy sector.

New thermal and cold spray technologies are being developed to extend the lifespan of thermal barrier coating (TBC) systems at elevated temperatures. This article describes the relevant attributes of coating technologies such as high velocity air fuel, high velocity air plasma spray, and high pressure cold spray for use in TBC systems.

This article describes the design and operation of a high-deposition rate plasma nozzle developed for ambient pressure spraying.

Innovations built into a new plasma spray torch address shortcomings of previous axial injection equipment.

Renewed interest in a NASA-developed material known as Triboglide has led to a study of the friction and wear properties of HVOF-sprayed Triboglide coatings and close variants. This article describes the coating process, examines coating cross-sections, and presents and analyzes the results of high-temperature pin-on-disc wear tests.

Triboglide coatings offer enhanced wear resistance in applications like air foil bearings, actuators, and wear components where oil-based lubrication is scarce. They exhibit excellent wear and friction properties compared to other commercially available coatings.

What needs to be discovered, learned, and understood to advance thermal spray beyond existing practices? Is revenue a realistic indicator of progress and advancement or is it just a framework for a much bigger picture? This article reviews some past successes, failures, and unrealized potentials of industrial and manufacturing outcomes and provides details of the knowns and unknowns of the thermal spray portfolio.

Cold spray is an effective method of depositing a variety of temperature-sensitive materials in specialized applications, such as high-value aerospace component repair. The use of cold spray has seen a significant increase in the repair and restoration of housings for integrated drive generators used in commercial aircraft.

The absence of standards and a common vocabulary are an obstacle when it comes to evaluating the structure of thermal spray coatings. However, proper sectioning and mounting of metallographic specimens helps ensure that the images obtained accurately reflect the coating structure and the information that can be derived from it.

Field assisted sintering technology (FAST) enables cost-effective manufacturing of metal, ceramic, and composite components with sub-micron grain microstructures and tailored properties.

Advanced materials engineering is being used to solve component life cycle improvement challenges in extremely harsh working conditions. This article discusses examples from various industries where new materials and surface modifications are used to extend the useful life of engineering components and equipment.

Aerosol deposition offers an alternative to conventional thin film processes when mesoscale coatings are needed. The process is being used to create readily integrated, high density ceramic and metallic thick films on a variety of substrates at room temperature.

Coating development using cold gas spray technology demonstrates the feasibility of bonding polymers to metal substrates and metals to polymer composite substrates with good adhesion. The examples addressed are polyetheretherketone (PEEK) coatings on steel and aluminum substrates and metallic coatings on carbon fiber reinforced polymer (CFRP) composites.

This article, the first in a two-part series, explains how powder metallurgy presents a cost-effective alternative to conventional titanium fabrication processes. It reviews the characteristics of different types of titanium powders and compares and contrasts near-net shape (NNS) production techniques, including conventional press-and-sinter, cold isostatic pressing (CIP), hot isostatic pressing (HIP), CIP-sinter, and CIP-sinter-HIP (CHIP). Other titanium production methods are covered in Part 2, which is scheduled for the October 2012 issue of AM&P .