Diamond Composites via Lithographic Layer-by-Layer Construction
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Solution Overview
Problem
Conventional compaction techniques for manufacturing diamond composite materials face challenges such as achieving homogeneous surfaces and edges, high defect rates, particularly at edges, and poor wear resistance due to impurities introduced by press tools, which are costly and affect the final product's quality, especially in critical industries like medical and food.
Innovation Solution
A lithographic layer-by-layer construction method using a free-flowing slurry with a polymerisable binder, followed by debinding and sintering, to create diamond composites with uniform diamond distribution and optimized surface roughness, reducing impurities and maintaining complex geometries, thereby enhancing wear resistance and thermal stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional compaction techniques are used to manufacture diamond composite materials, then manufacturing simplicity is maintained, but manufacturing precision deteriorates due to difficulty in achieving homogeneous surfaces and edges
Solution Approach 1:
The manufacturing process is segmented into distinct stages: slurry preparation, layer-by-layer deposition, curing, and sintering. This segmentation allows each stage to be optimized independently, achieving homogeneous surfaces and edges through controlled layer formation while maintaining overall process manageability.
Solution Approach 2:
The invention transitions from conventional three-dimensional compaction to a layer-by-layer additive manufacturing approach. By building the diamond composite in sequential two-dimensional layers, the process achieves superior surface homogeneity and edge quality that cannot be obtained through traditional volumetric compaction methods.
2Reliability
If conventional compaction techniques are used, then manufacturing speed is maintained, but reliability deteriorates due to high defect rates particularly at edges
Solution Approach 1:
The layer-by-layer construction method allows preliminary formation of defect-free surfaces and edges during the deposition and curing stages, before sintering. This preliminary action ensures that the green body already possesses the desired surface quality, which is then preserved through the sintering process, eliminating the need for post-processing repairs.
3Object-affected harmful factors
If press tools are used in conventional compaction, then ease of manufacture is maintained, but harmful factors increase due to impurities introduced by press tools
Solution Approach 1:
The invention extracts and eliminates the press tool from the manufacturing process entirely. By using a slurry-based additive manufacturing approach, the process removes the source of metal impurities that would otherwise be introduced by conventional press tools, achieving ultra-pure diamond composites suitable for medical and food industry applications.
4Strength
If conventional compaction techniques are used, then manufacturing cost is reduced, but wear resistance deteriorates due to poor edge compaction and impurities
Solution Approach 1:
The invention uses a composite slurry system containing diamond particles, binder, and additives that work synergistically during layer-by-layer construction. This composite approach ensures uniform diamond distribution and strong inter-layer bonding, achieving superior wear resistance and edge strength that outweighs the increased material and process costs.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method produces diamond composite tools with improved wear resistance, reduced impurities, and uniform density, extending their working life and maintaining dimensions with minimal deformation, suitable for high-stress applications like metal and rock cutting.
Implementation Method 1
forming a green body by light radiation curing a free-flowing ceramic slurry via a layer-by-layer stepwise build process
Implementation Method 2
The resulting green body is then subjected to de-binding to remove the initial green body binder typically involving heating to temperatures in the region of 90° C. to 600° C.
Implementation Method 3
The resulting white (alternatively termed brown) body is then sintered at high firing temperatures to compact and solidify during a significant volume decrease whereby the densified ceramic exhibiting low porosity and high strength is provided.
Data Source
AI summary
A lithography based method for the manufacture of diamond composite materials in which green bodies are prepared by a layer-by-layer construction with resulting green bodies de-bound and sintered to achieve a dense high hardness material.