Carbon Nitride Breakthrough Opens Door to Major Advancements in Material Science

Whether discussing advancements surrounding computing, sustainable energy, transportation, or something else entirely, none of it would be possible without underlying breakthroughs in material science.  While some breakthroughs hold the potential to be more significant than others – remember the excitement over a potential room-temperature superconductor in mid-2023? – each plays an important role in facilitating progress across a litany of sectors as materials used become lighter, stronger, cheaper, etc.

To that end, scientists have recently succeeded in realizing a 30+ year goal of manufacturing a material harder than a diamond from carbon nitrides.  Read on to find what this means, potential use cases for such a product, and the companies that may benefit most if efficient manufacturing processes are developed.

The Breakthrough

The study, titled “Synthesis of Ultra-Incompressible and Recoverable Carbon Nitrides Featuring CN₄ Tetrahedra” saw researchers manufacture four carbon-nitrogen compounds,

• oP8-CN
• hP126-C₃N₄
• tI14-C₃N₄
• tI24-CN₂

This was achieved using diamond anvil cells, subjecting the compounds to an extremely high pressure (72 to 134 GPa) and temperature environment (2500 K).

Promisingly, the resulting compounds, which were said to boast a tetrahedral structure with strong covalent bonds, boasted characteristics such as being ultra-incompressible and superhard.  In addition, they displayed various properties that could make them intriguing across a variety of applications.  These included,

• high energy density
• piezoelectricity
• photoluminescence​​​​.

The compounds are being viewed as significant specifically due to their hardness, which could potentially rival or exceed that of diamonds.  The synthesis of such materials, previously considered theoretical, marks a significant advancement in high-pressure materials science​.

Bulk Modulus Vs. Mohs Scale

In this study, it was found that the bulk modulus of the compounds reached figures as high as 419 GPa.  It notes that this is comparable to diamonds (446 GPa), and means that “all four carbon nitrides classify as ultra-incompressible materials”.

However, it is important to recognize that ‘bulk modulus’ is not the same as the Mohs scale, with there being a clear distinction between the two measurements.

Bulk Modulus: This is a measure of a material’s resistance to uniform compression and is expressed in units of pressure, such as Pascals (Pa).  It quantifies how incompressible a material is.  A higher bulk modulus means the material is more rigid and less compressible, suggesting it might be harder.

Mohs Scale: This is a qualitative and ordinal scale that ranks materials based on their scratch resistance, relative to other materials.  It ranges from 1 (softest) to 10 (hardest).  The Mohs scale is more straightforward and practical for comparing the hardness of different minerals, but it does not provide numerical or precise measurements like the bulk modulus.

Simply put, bulk modulus is a more precise method for assessing the hardness of a material, while the Mohs scale does so indirectly through scratch resistance.

Use-Cases

Understanding the results, it becomes easier to imagine some of the future applications for such a material.  With the carbon nitrides synthesized possessing a combination of superhardness, piezoelectric properties, and photoluminescence, they are potentially suitable for a variety of applications.

An illustrative look at potential implementations for carbon-nitrides as hard as diamonds.

Industrial Applications: Their superhard nature makes them suitable for cutting tools, abrasives, and drilling equipment.  They could significantly enhance the performance and lifespan of these tools.

Electronics and Optoelectronics: The piezoelectric and photoluminescent properties of these materials could be beneficial in developing advanced electronic and optoelectronic devices, including sensors, transducers, and components for laser technology.

Energy Storage: Given their high energy density, these carbon nitrides might be explored for use in energy storage solutions, potentially enhancing the efficiency and capacity of batteries or supercapacitors.

Aerospace and Defense: The combination of hardness, durability, and thermal stability could make them valuable in aerospace and defense for components that require materials that can withstand extreme conditions.

Medical Technology: The biocompatible nature of carbon nitrides could open up applications in biomedical fields, such as in prosthetics or as coatings for implants to enhance durability and performance.

Clearly, the properties displayed by these compounds make them very intriguing, and despite a current lack of practical manufacturing processes at scale, they present enough potential for continued research.

Top Advanced Material Science Companies

While the aforementioned breakthrough involving carbon nitrides is intriguing, it will only be through the efforts of companies, such as those listed below, to incorporate them into products that will allow their potential to be reached.

*Figures provided below were accurate at the time of writing and are subject to change.  Any potential investor should verify metrics*

1. 3M Company

3M Company (MMM -1.13%)

3M Company, renowned for its innovation in diverse scientific and industrial domains, could greatly benefit from the newly synthesized carbon nitrides.  These materials, with their exceptional hardness and durability, align well with 3M’s focus on advanced material solutions for industrial, healthcare, consumer, and electronics markets.  Particularly, their superhard nature could enhance 3M’s abrasives and cutting tools, while their piezoelectric and photoluminescent properties might find applications in electronic components and optical systems.  The incorporation of carbon nitrides into 3M’s product lines could lead to the development of more efficient, durable, and versatile materials, furthering the company’s legacy of innovation.

2. General Electric

GE Aerospace (GE -1.65%)

General Electric (GE), a multinational conglomerate, could also stand to gain from the development of carbon nitrides.  GE’s diverse portfolio, spanning aviation, power generation, and renewable energy, could utilize these advanced materials to revolutionize its product lines.  The adoption of carbon nitrides could mark a significant step in GE’s commitment to technological advancement and sustainability.

3. Raytheon Technologies

Rackspace Technology, Inc. (RXT -5.59%)

Finally, Raytheon Technologies, a prominent aerospace and defense company, could benefit from the carbon nitrides recently synthesized.  As a leader in developing advanced systems for aerospace and defense applications, Raytheon’s interest could lie in utilizing these ultra-incompressible, superhard materials for manufacturing high-strength, lightweight components.  The exceptional properties of carbon nitrides make them ideal for aerospace structures and defense systems that require materials capable of withstanding extreme environmental and operational conditions, enhancing the durability and performance of Raytheon’s products.

Final Thoughts

It was a long road getting to the point of this study.  For over three decades, scientists have pursued the goal of creating carbon nitrides as hard as diamonds, with the endeavor beginning in 1989.  Now that this has been achieved, it has marked a significant milestone in materials science, which now shifts some of the focus on how to repeatedly synthesize such materials at scale for use in commercial applications on offer by companies like those listed.