Cold Spray Technology

Liever in het Nederlands? klik hier

Cold Spray Symposium

The DCST (Dutch Cold Spray Team, consisting of: Dycomet Europe, KLM E&M, Flame Spray Technologies, Royal NLR , Dutch Thermal Spray Association, and Vereniging Industrieel Oppervlaktebehandelend Nederland) invites you to attend the 2021 Cold Spray technology symposium on November 4th at NLR Marknesse. This symposium is open to industry, SME’s, technical consultancy & engineering bureaus, universities and research institutes that are interested in all aspects of GDCS (Gas Dynamic Cold Spraying) and Cold Spray Additive Manufacturing (CSAM).

Due to the measures in force against the spread of the coronavirus, the capacity for a physical meeting is smaller than before. The symposium will therefore also be available online via BigBlueButton. During the registration process on this website you can indicate your preference for physical or online participation.

PLEASE NOTE: the language of instruction for this symposium is Dutch.

Preliminary program 9:30 – 15:45

9:30 am            Registration and walk-in with coffee

10:15 am           Opening by NLR and VTS

10:30 am           Lecture I – Basic information incl. introduction to coating processes / thermal spraying

& cladding basic principles, critical speed, adhesion principles, difference compared to thermal spraying and LASER cladding, etc.)

11:15 am           Break

11:30 am           Lecture II – Materials/coatings (powder types, sprayability of materials, coating

properties, standards, testing, metallurgical photos, etc.)

12:15 pm           Lunch

13:15 pm           Guided tour at NLR

14:00 pm           Lecture III – Spray equipment (supplies, spare parts, He/N2, low pressure/high pressure

systems, temperatures, etc.)

14:45 pm           Break

15:00 pm           Lecture IV – Applications (examples of applications and industries)

15:45 pm           Closing with drinks

Sign up while you still can. Registration closes on 29-10-2021.

Please register here.

Location

PLEASE NOTE: the language of instruction for this symposium is Dutch.

Due to the measures in force against the spread of the coronavirus, the capacity for a physical meeting is smaller than before. The symposium will therefore also be available online via BigBlueButton. During the registration process on this website you can indicate your preference for physical or online participation.

The symposium will be held at NLR Marknesse:
Visiting address
Voorsterweg 31
8316 PR Marknesse
The Netherlands

Travel directions NLR Marknesse

If you want to visit us, don’t forget to bring a valid ID card or passport.

Organizing committee
NLR Vision on Cold Spray

What is cold spray?
Cold spray is a relatively new technology belonging to the thermal spray technologies. However, it is actually a solid-state process in which the powder particles are accelerated to supersonic velocities and impacted upon colliding with the substrate to be coated.

Thanks to its low thermal input to the substrate, cold spray is suitable for temperature- or oxidation sensitive materials. Also phase changes and grain growth of the substrate do not occur. This is extremely beneficial when the sprayed object has undergone heat treatments to increase hardness, strength, or toughness, which would degrade when the thermal input to the substrate becomes too high. Furthermore, the other heat related issues in other, hot, thermal spray methods, such as thermal residual stresses or thermal shrinkage pose no problem in cold spray.

What are the applications?
Due to compressive stresses being formed during the plastic deformation of the powder particles, thick coatings, or material deposits, can be formed. Cold spray is therefore suitable to repair all kinds of metal parts. An example from the aerospace sector is found in magnesium gear boxes housings in helicopters. They corrode as a result of damaged coatings or severe environmental conditions, with oil leakage as a result. Without cold spray, scrapping of these housings was often necessary. Geometric restoration of these damages with cold spray reduces costs and the environmental footprint. Similar applications include restoration of moulds, die casts, or automotive components. Since large thickness deposits are possible, cold spray is also used as an additive manufacturing technique. It can be used to form completely new parts or to add features to existing objects. Compared to the longer existing additive manufacturing techniques, cold spray based manufacturing allows for a higher build rate. As a result, large(r) parts can be produced at relatively low costs.

The freedom of material selection makes the amount of applications immense. The range of metals that can be processed include steel, aluminium, copper, bronze, magnesium and many others including a large number of their alloys. Besides metals, also polymers, ceramics or metal matrix composites such as carbide based blends (e.g. WC-Co or CrC-Ni) can be processed. All these materials allow for application of all kinds of functional coatings. Think of improvement of corrosion resistance, improved wear resistance, or other tribological properties that come with the application of a dedicated spray material.

NLR Background

NLR has decades of experience with aircraft structures, materials, and maintenance. Thanks to its wide field of applications, cold spray is a technology that fits into many business areas, including those of NLR. For example, cold spray finds applications in Additive Manufacturing. NLR started with metal additive manufacturing in 2012 with Powder Bed Fusion technology. Since then, the additive manufacturing team became what we now know as the Metal Additive Manufacturing Technology Centre (MAMTeC) which recently expanded its technologies with the purchase of a Directed Energy Deposition machine. NLR cooperates with industry, small and medium-sized enterprises, universities, and other research institutes in order to master the processes and to be able to produce parts with a constant and high quality at competitive prices.

Another obvious field of cold spray application is in maintenance. NLR is active in MRO, in the sense of technical solutions and with the certification trajectories involved with these solutions. NLR has many years of experience with designing repair solutions for worn or damaged components or coatings, and damages as a result of corrosion. The facilities, such as a metallurgical laboratory including SEM, are crucial to perform research, inspect parts and repaired components, including cold spray coatings or components.