Pore-Forming Technology for Diamond Tools: Enhancing Grinding Performance Through Micro-Porous Structures
Sep 07, 2026
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Pore-forming technology is a specialized manufacturing process that introduces pore-forming agents into the bond matrix of diamond tools - including saw blade segments, grinding wheels, and abrasive blocks - to create micro-porous or pit-like structures on the working surface during production or actual use. These engineered voids significantly improve grinding efficiency, chip evacuation, and thermal management, making the technology widely adopted in stone, ceramic, concrete, and glass processing industries.
1. Two Pore-Forming Approaches
| Method | When Pores Form | Typical Applications |
|---|---|---|
| Indirect Pore-Forming | No visible pores after manufacturing; pits form gradually when the pore-forming material sheds away during cutting or grinding. | Ceramic blades, sintered stone blades, stone blades, glass grinding wheels, quartz glass processing, cutting tools. |
| Direct Pore-Forming | Distinct pits or pores are already present on the working surface once the tool is finished. | Tools with large grinding contact areas or thick segments/wheels, such as those used for concrete, stone, glass, and ceramic processing. |
2. Commonly Used Pore-Forming Materials
For indirect pore-forming:
- Dried plant granules (e.g., screened coffee grounds, which become loose carbon particles after sintering)
- Porous carbon granules
- High-purity graphite microspheres
- Water-soluble metal salt particles
For direct pore-forming:
- Hollow carbon spheres
- Hollow ceramic spheres
- Water-soluble metal salts (dissolved out with hot water after forming)
3. Core Benefits
| Reduced Ineffective Contact Area | Porous regions eliminate unnecessary contact between diamond-free bond material and the workpiece, lowering friction and cutting resistance. |
| Improved Chip Evacuation | Voids provide storage and escape channels for grinding swarf, preventing chip clogging and glazing that cause slippage and reduced performance. |
| Overheating Prevention | Under dry cutting or coolant-free grinding, pores reduce heat generation. When coolant is available, voids can carry small amounts of coolant directly into the grinding zone for effective cooling. |
| Verified by Testing | Infrared temperature measurement at the moment of tool withdrawal confirms that the grinding surface temperature of pore-formed tools is significantly lower than that of non-porous equivalents. |
(Proe-forming Technology of Turbo Diamond segment)
(Proe-forming Technology of Diamond cup grinding wheel)
(Proe-forming technology of glass diamond grinding wheel)
4. Process Considerations
| No. | Key Consideration |
|---|---|
| 1 | Do not use stainless steel ball media during mixing, as it will crush the pore-forming materials. Springs or thin-diameter chains are recommended instead. |
| 2 | After blending the powder with diamond grit, moisten the pore-forming material with liquid paraffin before adding it to the mix to ensure even dispersion. |
| 3 | Selected materials must not release harmful gases during manufacturing or use, in compliance with environmental and safety standards. |
| 4 | For saw blades, the dosage of pore-forming material must not compromise transverse rupture strength. A dedicated welding layer can be designed for silver-copper brazed or laser-welded segments. |
| 5 | Storage conditions: room temperature below 25°C and relative humidity below 55% to prevent moisture degradation of pore-forming materials. |
| 6 | Cost advantage: 1 gram of pore-forming material can replace 3–4 grams of bond powder, meaning the technology does not increase - and may even reduce - material cost. |
| 7 | Primarily applied to metal-bonded tools. Vitrified bonds can use hollow ceramic spheres, and certain resin-composite bonds are also compatible. |
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In short: Pore-forming technology works by embedding sacrificial or soluble materials into the bond matrix so that micro-porous structures form on the tool's working surface - delivering "less friction, better chip clearance, and effective heat control" - without increasing, and often lowering, overall material cost. |
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Disclaimer This article is published on our website as technical reference content. Our organization serves solely as an information platform and does not warrant the accuracy of technical parameters or guarantee practical results.
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