Cermet Tooling Detectability via Magnetic Metallic Particles

Solution Overview

Problem

Ceramic tooling is unsuitable for food and pharmaceutical applications due to its brittleness and the difficulty in detecting and removing chips or fragments, which can contaminate products.

Innovation Solution

Development of a cermet body with a ceramic matrix and high magnetic permeability metallic particles, allowing for the creation of tooling that is both strong and detectable by conventional metal detection methods, enabling improved safety features and contamination prevention.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If ceramic material is used for tooling, then compressive strength is improved, but detectability of chips and fragments deteriorates

Engineering Contradiction:

Core Design Contradiction:

StrengthVSDifficulty of detecting and measuring

Solution Approach 1:

The patent applies composite materials by combining ceramic material with magnetic metallic particles to create a cermet composition. This composite structure provides both the compressive strength of ceramic and the magnetic detectability of metal particles, resolving the contradiction between strength and detectability.

Inventive Principle:

Principle #40Composite materials

2Strength

If ceramic material is used for tooling, then wear resistance is improved, but brittleness increases

Engineering Contradiction:

Core Design Contradiction:

StrengthVSStability of the object's composition

Solution Approach 1:

The cermet composite combines the wear resistance of ceramic with the toughness of magnetic metallic particles. The metallic particles act as reinforcement that reduces brittleness while maintaining wear resistance, allowing the tooling to withstand mechanical stress without chipping.

Inventive Principle:

Principle #40Composite materials

3Difficulty of detecting and measuring

If magnetic metallic particles are added to ceramic, then detectability is improved, but electrical conductivity deteriorates

Engineering Contradiction:

Core Design Contradiction:

Difficulty of detecting and measuringVSReliability

Solution Approach 1:

The magnetic metallic particles are distributed locally throughout the ceramic matrix at controlled concentrations. This local addition provides detectability where needed while maintaining the overall electrical insulating properties of the ceramic bulk, resolving the contradiction between detectability and electrical conductivity.

Inventive Principle:

Principle #3Local quality

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 enhanced compressive strength, toughness, and wear resistance while being easily detectable, reducing contamination risks and extending tooling lifespan through improved detection and maintenance capabilities.

Implementation Method 1

each respective high magnetic permeability magnetic metallic particle has a magnetic permeability of at least 0.0001 H/m

Methodology Applied

Scientific EffectMagnetic permeability: Ferromagnetism

Implementation Method 2

the cermet body enjoys sufficient bulk electrical conductivity to be machined via electrical discharge machining

Methodology Applied

Scientific EffectElectrical conductivity: Conduction (electrical)

Data Source

PatentEP4035799A1Cermet composition

Publication Date: 2022.08.03

Figure 1A~1C
Figure 2A
Figure 2B~3

AI summary

A cermet body, comprising a ceramic portion and a plurality of high magnetic permeability magnetic metallic particles distributed throughout the ceramic portion, wherein each respective high magnetic permeability magnetic metallic particle has a magnetic permeability of at least 0.0001 H/m, wherein the magnetic metallic particles define a contiguous metallic phase, and wherein the cermet body enjoys sufficient bulk electrical conductivity to be machined via electrical discharge machining.