Metal Matrix Composite for Decorative Elements
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Solution Overview
Problem
Current metal matrix composite materials used in horology and jewelry lack durability and are challenging to machine, while synthetic grainy materials are soft and prone to deterioration.
Innovation Solution
A composite material with a metal matrix comprising 50-95% volume and ceramic particles of 0.1-2 mm diameter, dispersed in a metal powder with a D90 value of less than 100 μm, combined with optional organic binders and sintered at 600-1400°C, allowing for easy shaping and enhanced aesthetic effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If natural grainy materials such as granite are used to produce decorative elements, then an original and surprising appearance is achieved, but the materials are very hard and machining is long and expensive
Solution Approach 1:
The patent uses composite materials consisting of ceramic particles dispersed in a metal matrix. This composite structure provides both the desired grainy appearance similar to natural granite and the ease of machining characteristic of metals, resolving the contradiction between aesthetic appearance and manufacturability.
2Ease of manufacture
If grainy composite materials are obtained by combining polymer binder with ceramic particles, then easy profiling by moulding is achieved, but the materials are relatively soft and tend to deteriorate over time
Solution Approach 1:
The patent changes the binder material parameter from polymer to metal matrix, and adjusts the ceramic particle size parameter to 0.1-2 mm. This parameter change maintains the moulding capability while dramatically improving durability, as metal matrices provide structural stability and resistance to deterioration under light and temperature effects.
Solution Approach 2:
The patent employs a composite material system with ceramic particles dispersed in a metal matrix, replacing the polymer-ceramic composite. This composite structure combines the shapeability of moulded materials with the durability of metal-ceramic composites, resolving the contradiction between ease of manufacture and reliability.
3Shape
If grainy composite materials are obtained by combining ceramic particles with mineral binder, then decorative elements can be manufactured, but the elements are relatively fragile and cannot be produced at high rate by moulding
Solution Approach 1:
The patent changes the binder material from slow-hardening mineral binder to metal matrix, and optimizes ceramic particle size to 0.1-2 mm. This enables high-rate production through moulding while maintaining structural integrity and decorative appearance, as metal matrices allow faster processing cycles compared to cement-based binders.
4Shape
If ceramic particles with small dimensions less than 10 μm are used in metal matrix composite, then uniform visual appearance is achieved, but the ceramic particles represent greater than 80% volume fraction requiring high ceramic content
Solution Approach 1:
The patent changes the ceramic particle size parameter from less than 10 μm to 0.1-2 mm, and adjusts the volume fraction to 5-50%. This parameter change maintains the grainy aesthetic appearance while reducing ceramic content, allowing for more balanced composite formulations with improved processability and reduced material 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 resulting composite is hard, resistant to corrosion, and maintains appearance over time, enabling the production of decorative elements with original texture and shape flexibility, similar to natural rocks, without the limitations of polymer-based materials.
Implementation Method 1
a first mixture of the metal powder and the ceramic particles is obtained; a green body is produced by pressing or by injecting the first mixture into a mould; the green body is subjected to a sintering treatment
Data Source
AI summary
A composite material having a grainy appearance, this composite material including a metal matrix which represents, in terms of volume fraction, between 50 and 95% of the grainy composite material, the ceramic particles having a diameter that lies in the range 0.1 to 2 mm and which represent, in terms of volume fraction, between 50 and 5% of the composite material are dispersed in the metal matrix and form the remainder of this grainy composite material. A method for manufacturing a grainy synthetic material.