Ceramic BRAKE ROTOR BREAKTHROUGH 

Background


Conjugate Heat Transfer Modeling
Brake Rotor Thermal Modeling
Brake rotor thermal and compressive FEA modeling

 

CDT is offering a high-performance sports car-oriented brake rotor. It has 2-3x less unsprung weight, faster acceleration, better handling with less dust and noise all at a competitive price. We deliver on the historical promise of aluminum brake rotors which are installed on low volume lighter production cars.

Each car’s specific brake rotors are optimally designed to dramatically improve heat dissipation via a more optimized surface area uniquely enabled by additive manufacturing or 3D printing, with stronger airflow, better thermal conductivity, and specific heat capacity. Our aluminum ceramic composite material creates a lighter design with superior high-temperature strength required by the demanding braking performance of sports car-oriented rotors. We add sophisticated heat transfer structures to the inside the vented brake rotor creating these compelling product claims.

The CRT-rotor product enables faster acceleration via less unsprung weight. For example, our rotors save 65 pounds in a Dodge Challenger Hellcat which equals ~195 pounds of sprung weight. Additionally, you double the rotor life over cast iron, with 95% less dust (an environmental plus) and better car handling. The rotor design creates better heat dissipation via more heat transfer surface area, stronger airflow, 5-times better thermal conductivity along with better material diffusivity and thermal shock performance. Customers want the benefits of unsprung weight, dust reduction, handling advantages, fuel economy, service life and finally the environmental benefits of virtually no particulate emissions.

 

PRODUCT PROFILE


Below is a table that maps the product features, description, advantages, and benefits for the customer. The technical specifications section has a similar comparison yet with specific scientific values contrasting cast iron and carbon fiber.

Feature Description Advantages Benefits
CDT-Rotors, Material Proprietary ceramic aluminum metal matrix composite designed for additive manufacturing
  • Allows for 5x better thermal conductivity, better thermal diffusivity, 2x better specific heat capacity.
  • Material properties improve with temperature increases, cast iron does the opposite.
  • Reduces brake dust by 95%
  • 67% reduction in weight for cast iron
  • 5% weight reduction over carbon fiber
  • Rotor will not rust
  • Improves the ability to extract heat quickly from rotors with an increased thermal capacity to handle constant extremes of heat
  • Reduces labor cost associated with cleaning dust of rotors and wheels
  • More than doubles the life over cast iron rotors saving money
  • Weight reduction improves acceleration / deceleration, handling, and car feel
  • Minimizes warping and cracking and prolongs the service life of the rotor
  • Virtually no environmental particulate pollution
Exotic vented internal heat exchanger features- nearly 2,000 radial channels ~1-millimeter internal walls of the vented rotor with curved slots and microturbulator heat exchanger design creating patent-pending novelty.
  • The design creates massive and rapid heat transfer and dramatically lower temperatures.
  • Increased surface area results in greater heat dissipation
  • Balancing is better and easier and less critical due to lower rotational mass
  • Minimizes brake fade and increases braking effectiveness
  • Prolongs service life for both pads and rotors
  • Less likely of being out of balance due to lower weight
Customization via made to order additive manufacturing Each rotor besides being slotted and not drilled can have unique car markings.

 

  •  Car model number or owner initials and be printed into the rotor and anodized a specific color
  • Slots and internal areas are anodized to further show off the bling or cool factor of the rotors
  • Slots dampen the vibration harmonics and noise
  • Customer experiences pride, ego and emotional satisfaction
Precise tolerances and quality controls Materials are tracked, rotors are precisely machined, serialized and processed to create traceability for every rotor
  • Each rotor meets exacting mechanical tolerances
  • Product warranty
  • Better tracking and alignment
  • A quieter, responsive and smoother brake pedal feel
Custom Brake Pad material The brake pad material has been selected and optimized for our rotor material, provides a higher coefficient of friction
  • Increased fidelity to modulate braking force
  • Better driving experience
  • Improved braking control

Rotor Material Comparisons


Brake rotors have been made from many types of materials with different pads, stopping performance, cooling approaches, weight and reliability. There are numerous tradeoffs depending on the braking application and product design goals. The table below should clarify the details of these choices and how the customer should think about the purchase choices that are available.

Attribute Gray Cast Iron Carbon-Ceramic Carbon Fiber Reinforced Ceramic Carbon-Carbon CDT-Rotors

Ceramic- Aluminum

Description Commodity cast iron for OEMs Uses discontinuous chopped fiber pressed and resin bonded together Interweaves continuous carbon fiber to form a 3D multi-directional matrix Both brake pad and rotor are made from carbon fiber Uses a proprietary metal matrix composite suitable for additive manufacturing
Applications Common use across industry, some performance applications Common in sports car, aftermarket, and high-performance OEM offerings Mostly aftermarket exotic rare and some race cars Commonly used in Formula 1 racing Sports car and high-performance aftermarket
Manufacturing Time Hours Days Months 5-6 Months Hours
Product Use Stability Excellent-completely dense, no voids Loses mass under hard braking, creating weight imbalances. Internal voids from incomplete resin conversion Excellent-completely dense, no voids Excellent-completely dense, no voids Excellent-completely dense, no voids
Production Technique Cast Mixed & pressed Layup and pressed Layup and pressed Additive manufacturing
Patented No No Yes No Yes
Wear life Good Excellent Excellent Poor Excellent
Surface Quality Excellent Brittle and delicate surface Excellent Excellent Excellent
Risk of chipping/dents Low High Low Low Low