Product Name:
Zirconia Ceramic Parts with Internal/External Thread Machining
Product Material:
Yttria-Stabilized Tetragonal Zirconia Ceramic (Y-TZP). For applications requiring extreme wear resistance or specific electrical properties, Silicon Carbide (SiC) can be selected, or Silicon Nitride (Si₃N₄) offered as an alternative.
Material Characteristics:
Exceptional fracture toughness (highest among ceramics, K₁c: 8-12 MPa·m¹ᐟ²) and high impact resistance, Ultra-high hardness (HV >1200) and very low thread wear rate, Excellent chemical corrosion resistance (resistant to strong acids, alkalis, organic solvents, and salt spray), High mechanical strength and good creep resistance, Low friction coefficient, Capable of achieving high-precision and high-finish thread surfaces (Ra < 0.4 µm), Material is pure, non-magnetic with no metal ion leaching, Excellent biocompatibility.
Application Fields:
High-cleanliness, corrosion-resistant threaded connectors in semiconductor and vacuum equipment (e.g., chamber viewport flanges, feedthrough interfaces); Sterile, biocompatible threaded components in biomedical devices and implantable instruments (e.g., sensor housings, adjustable implant connectors); Corrosion and wear-resistant pipe fittings, valve cores, and threaded sections of measurement probes in chemical and petroleum equipment; Precision, inert fluid connection interfaces in high-end analytical instruments (e.g., chromatography, mass spectrometry); High-stability lens retaining rings and adjustment mechanism threaded parts in optical and laser equipment.
Application Industries:
Semiconductor Manufacturing, Biomedical (High-end medical devices, implants), Fluid Control (Precision chemical processing, instrumentation), Petrochemical, New Energy (Fuel cells, electrolytic hydrogen production), Advanced Mechanical Equipment, Electronic Engineering.
Processing Difficulties:
Forming high-precision, high-integrity internal and external threads on high-hardness, high-brittness ceramic materials; Preventing micro-cracks, chipping, and stress concentration generated during thread machining (especially tapping or grinding); Ensuring thread parameters (flank angle, pitch diameter, pitch) meet strict tolerance requirements (often Class 6H/6g or higher); Machining deep-hole internal threads or slender external threads while ensuring their straightness and coaxiality; Ensuring surface finish of thread mating surfaces to meet sealing or low-friction requirements.
Processing Flow:
High-purity Y-TZP powder processing and forming (dry pressing/isostatic pressing/injection molding) → High-temperature sintering for densification → Precision CNC machining of part profile and datums → Thread Forming (selected based on accuracy and size): Diamond wheel thread grinding / Ultrasonic-assisted thread machining / High-precision ceramic-specific tap threading (on pre-sintered blanks) → Precision polishing and deburring of threaded sections → Full parameter inspection (pitch diameter, pitch, flank angle) using Coordinate Measuring Machine (CMM) and thread measuring machines → Surface cleaning and cleanroom packaging
Delivery Period:
Standard metric/imperial threaded parts: 40-65 days
High-precision, non-standard threads (e.g., trapezoidal threads, special taper threads) or miniature threads (below M3): 70-120 days
Zirconia Ceramic Parts with Internal/External Thread Machining are cutting-edge products that combine the exceptional mechanical properties and chemical inertness of zirconia with the precise functionality of threaded connections. In applications requiring connections and seals that simultaneously face harsh conditions of corrosion, wear, high purity, and electrical insulation, traditional metal threaded parts struggle with corrosion, galling, contamination, and insulation failure. This product provides the perfect solution through advanced ceramic thread machining technology. It not only inherits the fundamental traits of zirconia ceramic—high toughness, high hardness, and comprehensive chemical stability—but also, through sub-micron level thread machining accuracy, enables reliable, durable, and pure connections between ceramic parts or between ceramic and metal parts. It has become a key element for the modular design and long-term reliable operation of high-end equipment.
Key Features:
Robust and Durable Connection Solution: Anti-galling, Wear Resistant, Long Service Life – The high hardness and low friction coefficient of zirconia give the thread pair excellent anti-wear and anti-galling properties during repeated tightening and loosening, making it particularly suitable for equipment requiring frequent maintenance or adjustment. Its exceptional toughness effectively prevents brittle cracking that might be caused by installation stress, ensuring the long-term reliability and reusability of the threaded connection.
Superior Chemical and Environmental Tolerance – The entire part is made of highly chemically inert zirconia, with the threaded section also possessing perfect corrosion resistance. Whether exposed to corrosive atmospheres, acid/alkali media, or high-salt environments, it maintains thread strength and dimensional stability, without rust or chemical degradation, completely solving the failure problem of metal threads in harsh environments.
High Precision and Functional Integrity – The use of ultra-precision machining processes like diamond grinding ensures threads achieve high dimensional accuracy and geometric consistency. The smooth thread surface reduces friction and local stress concentration and can achieve a good seal if required. This combination of precision and quality enables ceramic threaded parts to achieve reliable connections with zero leakage and high repeat positioning accuracy in vacuum systems, fluid pipelines, and precision mechanisms.
