Unlocking High-Performance 3D Printing: Infinite Flex’s Pure Copper Powder Redefines Conductivity for Additive Manufacturing

The landscape of additive manufacturing is continuously evolving, with material innovations often acting as the primary catalyst for new application possibilities. A significant breakthrough has emerged from the German company Infinite Flex, which has successfully developed a pioneering copper powder specifically engineered for laser-based 3D printing processes, most notably for powder bed fusion. What makes this development particularly compelling is the material’s exceptional purity, boasting a remarkable 99.5% copper content. This stands in stark contrast to the additive manufacturing market’s usual reliance on copper alloys, which inherently compromise on critical material properties. With this high-purity offering, Infinite Flex aims to decisively meet the stringent requirements of demanding sectors, such as electronics, where superior electrical and thermal conductivity are not merely desirable, but absolutely essential for optimal performance and reliability.

Copper has long been recognized for its outstanding electrical and thermal conductivity, making it an ideal material for a myriad of industrial applications. However, its integration into laser-based additive manufacturing has historically presented significant technical hurdles. The inherent properties of copper, particularly its high reflectivity to commonly used infrared lasers, mean that a substantial portion of the laser energy is reflected rather than absorbed. This results in insufficient melting of the powder, leading to processing instability, challenges in achieving dense parts, and the potential for defects like porosity and cracking. Consequently, many players in the additive manufacturing market have explored alternative approaches to process copper. Companies like Desktop Metal, for instance, have strategically opted for extrusion-based methods, which process material differently and circumvent the reflectivity issue. Similarly, Digital Metal has favored binder jetting, a technology that uses a liquid binding agent to create parts layer by layer before sintering. Furthermore, machine manufacturers like Trumpf have innovated by developing specialized green lasers, which operate at a different wavelength that copper absorbs more effectively. Another common solution has been to utilize copper alloys, which are easier to process with standard lasers but inevitably lead to a reduction in the material’s crucial conductivity properties. Infinite Flex’s achievement in enabling high-purity copper within a laser powder bed fusion framework represents a significant leap forward, directly addressing these longstanding challenges without compromising material integrity.

Parts 3D printed with Infinite Flex’s copper powder (photo credits: Infinite Flex)

Infinite Flex’s journey to developing pure copper powder was informed by their prior experience with copper alloys, a path many in the industry have taken. The company notes, “We have already used copper alloys such as CuCrZr or CuNiSiCr. However, these alloys have the disadvantage that they have significantly lower conductivity properties than pure copper. CuCrZr, for example, achieves an electrical conductivity of at best 70% of the pure copper value, and in the case of CuNiSiCr the conductivity of 24 MS/m is even only about 40% of the value of pure copper.” This direct comparison highlights the critical performance gap. While alloys offer a processing advantage, the compromise in conductivity renders them unsuitable for applications where maximum efficiency is paramount. For instance, in advanced electronics, even a slight reduction in conductivity can lead to increased power loss, elevated operating temperatures, and ultimately, a shorter component lifespan. Faced with these conclusive results, and recognizing the market’s unmet demand for truly high-performance materials, Infinite Flex was driven to develop a new material solution that would deliver the uncompromised conductivity of pure copper within the additive manufacturing ecosystem. Their dedication underscores a commitment to pushing the boundaries of material science to better serve the evolving needs of high-tech industries.

Key Characteristics of INFINITE POWDER CU 01

The new material, aptly named INFINITE POWDER CU 01, represents a paradigm shift in metal additive manufacturing. Its core attribute is an impressive copper content of 99.5%, ensuring unparalleled material performance. This powder has been developed with versatility in mind, suitable for a range of advanced laser-based processes including Selective Laser Melting (SLM), Laser Metal Deposition (LMD), and Direct Deposition Manufacturing (DDM). The German company, however, notes its primary application and optimization on leading laser melting machines from industry stalwarts such as EOS and Trumpf, indicating its readiness for industrial adoption. The material exhibits exceptional mechanical properties, boasting an elongation at break (also known as fracture strain) of 24%. This significant ductility means that parts 3D printed with INFINITE POWDER CU 01 are highly robust and can withstand considerable deformation before fracturing, making them suitable for dynamic and structurally critical applications. Furthermore, its electrical conductivity is rated at greater than 52 MS/m, closely approaching the theoretical maximum for pure copper and far surpassing that of common copper alloys, enabling highly efficient electrical components. From a manufacturing perspective, the material facilitates the design and production of intricate parts with an ultra-fine layer thickness of just 30 microns, allowing for superior resolution and surface finish. Crucially, the achieved porosity is less than 0.1%, signifying extremely dense parts that exhibit excellent mechanical strength, thermal performance, and resistance to environmental factors, which are all vital for high-reliability components.

The powder has many interesting characteristics (photo credits: Infinite Flex)

The superior characteristics of INFINITE POWDER CU 01 position it as an ideal material for a broad spectrum of high-performance applications. Its exceptional thermal conductivity makes it perfectly suited for the production of advanced heat exchangers, where additive manufacturing can be leveraged to create complex, optimized internal geometries – such as intricate fin structures and conformal cooling channels – that are impossible with traditional manufacturing methods. These designs significantly enhance heat dissipation, leading to more compact, lighter, and more efficient thermal management solutions for industries ranging from aerospace to automotive and electronics. Moreover, the material’s high electrical conductivity opens up new frontiers for applications within the electronics and electrical sector. Components like miniature circuit boards, high-performance connectors, efficient busbars, induction coils, and motor components can now be designed with unprecedented efficiency and miniaturization. The ability to create complex and resistant parts through additive manufacturing, combined with pure copper’s innate properties, empowers engineers to innovate in areas where thermal and electrical performance are paramount. This allows for reduced energy losses, improved signal integrity, and enhanced device reliability, addressing critical demands in an increasingly electrified and digitized world. While the cost of a kilo of this advanced powder is currently 85 euros, placing it in the premium material segment, this investment is justified by the unparalleled performance, design freedom, and component optimization it enables. For specialized, high-stakes applications where functionality, weight savings, or specific performance metrics outweigh initial material costs, INFINITE POWDER CU 01 offers a compelling value proposition that can lead to significant long-term operational benefits and innovative product development.

Infinite Flex’s introduction of INFINITE POWDER CU 01 marks a pivotal moment for metal additive manufacturing. By successfully enabling the laser-based 3D printing of virtually pure copper, the company has not only overcome a significant technical challenge but also unlocked new possibilities for design engineers and manufacturers across various high-tech industries. This development paves the way for the creation of next-generation components that are smaller, lighter, more efficient, and more reliable than ever before. From revolutionary heat sinks that prevent overheating in critical systems to highly conductive electrical components that minimize energy loss, the impact of this material innovation is set to be far-reaching. As the additive manufacturing sector continues to mature, such specialized, high-performance materials will be crucial in expanding its adoption and realizing its full potential in mainstream industrial applications. This breakthrough reinforces additive manufacturing’s position as a transformative technology, continually pushing the boundaries of what is mechanically and electronically possible. You can find more detailed information on this pure copper powder and its capabilities by visiting Infinite Flex’s official product page HERE.

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*Cover Photo Credits: Infinite Flex