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Silicon Carbide

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Sizings Customized Silicon Carbide Ceramic Shaft SiC ceramics Rods

Silicon carbide ceramic rod is a high-performance ceramic material mainly composed of silicon carbide (SiC). With its high hardness, high temperature resistance (up to 1600 ℃), oxidation resistance, and excellent wear resistance, it is widely used in fields such as kiln transmission, electronic heat dissipation, and chemical equipment.

Introduction

Product Brief Description

Product details description

Characteristics of SiC ceramics:

1. Exceptional Hardness & Wear Resistance:

SiC is one of the hardest materials available, significantly harder than tungsten carbide and alumina. This makes it extremely resistant to abrasive wear, which is critical in applications like pump seals and bearings.

2. High Strength and Stiffness:

It has very high mechanical strength, especially in compression.

Its Young's Modulus (Elastic Modulus) is very high (around 400-450 GPa), meaning it is extremely rigid and resists bending under load. This is crucial for maintaining precision and minimizing deflection in high-speed shafts.

3. Outstanding Chemical Inertness:

SiC is highly resistant to corrosion from acids, alkalis, salts, and molten metals.

This makes it ideal for the chemical processing industry, semiconductor manufacturing, and harsh marine environments.

4. Excellent Thermal Properties:

High Thermal Conductivity: It conducts heat better than most metals and other ceramics. This helps dissipate heat generated by friction quickly, preventing thermal stress and seizure.

Low Thermal Expansion: Its coefficient of thermal expansion is very low. This means it maintains its dimensions and tolerances over a wide temperature range, reducing the risk of failure from thermal shock.

5. Low Density and High-Temperature Stability:

SiC is lightweight (about 60% the density of steel).

It retains its mechanical properties at very high temperatures (up to 1600°C in inert atmospheres), unlike metals which soften and creep.

Product Parameter Table

Item	UNIT	Pressureless Sintered Silicon Carbide (SSIC)	Reaction Bonded Silicon Carbide (RBSiC/SiSiC)	Recrystallized Silicon Carbide (RSIC)
Max temperature of Application	℃	1600	1380	1650
Density	g/cm³	> 3.1	> 3.02	> 2.6
Open Porosity	%	< 0.1	< 0.1	15%
Bending Strength	Mpa	> 400	250(20℃)	90-100(20℃)
	Mpa		280(1200℃)	100-120 (1100℃)
Modulus of Elasticity	Gpa	420	330(20℃)	240
	Gpa		300 (1200℃)
Thermal Conductivity	W/m.k	74	45(1200℃)	24
Coefficient of Thermal Expansion	K⁻¹×10⁻⁶	4.1	4.5	4.8
Vickers Hardness HV	Gpa	22	20
Acid Alkaline-proof		excellent	excellent	excellent

Applications of SiC shafts:

1. Mechanical Seal Faces and Shafts:In chemical, refinery, and slurry pumps where abrasive and corrosive fluids are present.
2. High-Speed Spindles: In precision machining, dental drills, and turbomachinery
where minimal deflection at high RPM is critical.
3. Semiconductor Manufacturing: For wafer handling robots, bearings, and stages in vacuum chambers where cleanliness, low particle generation, and corrosion
resistance are paramount.
4. Aerospace and Defense:*In guidance systems, pumps, and other components
requiring lightweight, high-stiffness, and thermal stability.
5. Specialized Pumps:For handling highly abrasive slurries in mining or paper
production.

Advantages of SiC Shafts

1. Long Service Life: Superior wear and corrosion resistance lead to dramatically longer lifespan in aggressive environments, reducing downtime and maintenance costs.
2. Reduced Friction and Energy Consumption: When paired with SiC or other hard
materials, it offers a low-friction interface, potentially improving energy efficiency.
3.High-Speed Capability: High stiffness and low density allow for operation at very
high rotational speeds without vibration or whip.
4. Maintains Precision: Low thermal expansion and high rigidity ensure dimensional stability, which is vital for precision machinery.
5. Suitable for Extreme Environments: Operates reliably in vacuums, high temperatures, and corrosive settings where lubrication is impossible.

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Silicon Carbide

Sizings Customized Silicon Carbide Ceramic Shaft SiC ceramics Rods

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