New oxidation-resistant carbon fiber yarn for high-temperature applications: weaving and winding process

1. Overview of weaving and winding technology

Weaving and winding are two main methods for processing carbon fiber yarns. They can transform fiber materials into preforms with specific shapes and functions. Weaving technology is suitable for manufacturing parts with complex shapes by cross-weaving fibers to form a two-dimensional or three-dimensional structure; while winding technology is to wind the fibers on a mandrel along a specific path, which is often used to manufacture axisymmetric parts such as pipes and pressure vessels.

For New oxidation-resistant Carbon Fiber Yarn For High-Temperature Applications, the application of weaving and winding technology not only needs to meet the processing requirements of traditional carbon fiber, but also needs to overcome the additional challenges brought by antioxidant coatings. Although antioxidant coatings improve the high-temperature performance of materials, they may also affect the flexibility and processing performance of fibers, so more sophisticated process control is required during weaving and winding.

2. Weaving process of antioxidant carbon fiber yarn
Weaving is the process of cross-weaving fibers according to a certain pattern to form a mesh structure.

(1) Fiber pretreatment
Before weaving, antioxidant carbon fiber yarns usually need to be pretreated to ensure the bonding strength between its surface coating and the fiber matrix. Pretreatment methods include surface cleaning and coating homogenization, etc., with the aim of reducing fiber breakage or performance degradation caused by uneven coating during weaving.

(2) Weaving equipment and process parameter setting
Anti-oxidation carbon fiber yarns are usually weaved using automated weaving machines, and the equipment needs to have high-precision tension control and speed regulation functions. Due to the presence of the antioxidant coating, the brittleness of the fiber may increase, so the tension and speed need to be strictly controlled during the weaving process to avoid fiber breakage. In addition, parameters such as weaving angle and fiber density also need to be optimized according to the performance requirements of the final component.

(3) Weaving of complex-shaped components
In high-temperature applications, many components (such as turbine blades and heat shields) have complex geometric shapes, which puts higher demands on weaving technology. Through three-dimensional weaving technology, anti-oxidation carbon fiber yarns can be weaved into preforms that are close to the shape of the final component. This technology can not only improve material utilization, but also reduce subsequent processing steps and reduce production costs.

(4) Quality control during weaving
During the weaving process, real-time monitoring of fiber tension, weaving angle and coating integrity is the key to ensuring the quality of preforms. By introducing an intelligent monitoring system, problems that occur during the weaving process can be discovered and corrected in a timely manner, thereby improving the yield rate.

3. Winding process of antioxidant carbon fiber yarn

Winding technology is a processing method in which fibers are wound around a mandrel along a specific path to form an axisymmetric component.

(1) Mandrel design and preparation

The mandrel is a key tool in the winding process, and its shape and size directly determine the geometric characteristics of the final component. For complex components in high-temperature applications, the mandrel is usually made of high-temperature resistant materials (such as ceramics or graphite) and is precision machined to ensure dimensional accuracy.

(2) Winding path planning

The design of the winding path needs to consider the mechanical properties of the component and the characteristics of the antioxidant carbon fiber yarn. Through computer-aided design (CAD) and simulation technology, the winding path can be optimized to ensure uniform distribution of the fibers in the component and optimal performance.

(3) Winding equipment and process control

Anti-oxidation carbon fiber yarn is usually wound using a CNC winding machine, and the equipment needs to have high-precision tension control and temperature regulation functions. Due to the presence of the antioxidant coating, excessive tension or temperature needs to be avoided during the winding process to prevent fiber breakage or coating shedding. Parameters such as winding speed and fiber spacing also need to be precisely controlled according to the performance requirements of the component.

(4) Curing and post-processing
After winding, the preform usually needs to be cured to fully combine the fiber with the matrix material (such as resin or ceramic). For oxidation-resistant carbon fiber yarn in high-temperature applications, the curing process needs to be carried out under high temperature conditions to ensure the material's antioxidant properties and high-temperature stability. After curing, the component also needs to be surface treated and quality tested to ensure that it meets the requirements for use.