Cermet Tooling Detectable Chips via Metallic Phase
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Solution Overview
Problem
Ceramic tooling is unsuitable for food and pharmaceutical production due to its brittleness and difficulty in detecting and removing chips or fragments, which can contaminate products.
Innovation Solution
Development of cermet compositions with a ceramic matrix and metallic phase, allowing for the creation of sintered ceramic bodies that are both strong and detectable by conventional metal detection techniques, enabling the production of metal-detectable ceramic tooling with enhanced safety features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If ceramic tooling is used to achieve superior compression strength, then compression strength is improved, but detectability of chips and fragments deteriorates
Solution Approach 1:
The patent applies composite materials by combining ceramic particles (providing compression strength) with metallic particles (providing detectability). This creates a cermet material that exhibits both the superior compressive properties of ceramics and the metal detection capabilities of metallic phases, resolving the contradiction between strength and detectability.
2Strength
If ceramic tooling is used to achieve superior compression strength, then compression strength is improved, but brittleness increases
Solution Approach 1:
The cermet composite combines brittle ceramic particles with ductile metallic particles. The metallic phase acts as a toughnessing agent that can bridge cracks and absorb energy, reducing the overall brittleness of the material while maintaining the high compression strength provided by the ceramic matrix.
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 cermet tooling offers improved safety through detectable contamination, increased durability, and reduced maintenance, with the ability to detect small chip sizes and provide abrasion resistance superior to tool steel.
Implementation Method 1
The metallic phase is typically introduced in oxide form for reduction to metallic form during processing
Implementation Method 2
The admixture is formed into a body having a desired shape by hot isostatic pressing (HIPPING)
Implementation Method 3
The resulting sintered cermet body has a ferromagnetic or paramagnetic metallic phase dispersed throughout
Implementation Method 4
these cermet compositions may then be formed into such bodies as metal-detectable ceramic tooling
Data Source
AI summary
A cermet body, including a ceramic portion and a plurality of high magnetic permeability magnetic metallic particles distributed throughout the ceramic portion. Each respective high magnetic permeability magnetic metallic particle has a magnetic permeability of at least 0.0001 H/m. The magnetic metallic particles define a contiguous metallic phase, wherein the cermet body enjoys sufficient bulk electrical conductivity to be machined via electrical discharge machining.