Bimetallic Materials: A Comprehensive Introduction

1. Introduction

1.1 Evolution of Electrical Conductors

electrical conductor and development in parallel。from to ，for search for optimal conductor materialscontinuous innovation^[1]。

1.2 Definition of Bimetallic Materials

Bimetallic materials consist of two different metals bonded together to form a single composite structure。In electrical applications，this typically involves：

• Core：providing structural or economic advantages
• Claddingmaterial ：providing surface performance（conductivity, corrosion resistance）

(ASTM B566)^[3]："CCAby and Cladding，its cross-section 5-15%。"

1.3 as Conductor？

material BasicPrinciplesperformanceproblem：

2. Principles

2.1

material through and functionachieves its performance：

its ：

• P_composite = performance
• V_i = i volume fraction
• P_i = i performance
• P_interface = Interfacecontribution

2.2 structure conductivity

for ，Effectivecurrent direction：

（current ）：

（current ）：

Key：Conductor，makes conductivityCladdingfor Overallconductivitycontribution 。

2.3 Skin Effect

in ，current in ConductorSurface。δby ：

for CladdingConductor ：for 100 kHz frequency ，Cladding（≥0.5 mm）available and etc. performance。

2.4 Mechanical properties

material can achieves Mechanical properties：

StrengthEnhancedMechanism：

1. ：CoreCladdingDeformation
2. ：in
3. Residual Stress：

3.

3.1 applications

3.2 CCA (CCA)

structure ：

• Core：（>99.5%）
• Cladding：（volume 10-15%）
• ：/Diffusion

applications：Building、Coaxial Cable、Transformer、Automotive、SolarSolar PV

standards：ASTM B566, IEC 62602

3.3 CCS (CCS)

structure ：

• Core：
• Cladding：（volume 10-40%）
• ：/Clad Welding

applications：GroundingConductor、CATV、High strengthConductor、ACSR

standards：ASTM B452, ASTM B227

3.4 NCC (NCC)

structure ：

• Core：
• Cladding：（volume 10-30%）
• ：

KeyPerformance：

• Operating Temperature：400-450°C
• Conductivity：85-90% IACS
• excellent Anti-oxidation

applications：Aerospace、、

standards：ASTM B355, SAE AS4395

3.5 SCC (SCC)

structure ：

• Core：
• Cladding：（volume 5-15%）

KeyPerformance：

• SurfaceConductivity：100%+ IACS
• Resistance：
• cost

applications：RF/System、Audio、Testing

4. ManufacturingProcess

4.1 CladdingMethodsOverview

4.2 CladdingSoldering Process（MainMethods）

Processstep ：

1. Surface：、、Surface
2. Cladding：、、
3. Drawing：Drawing、Work Hardening、DimensionsControl
4. Annealing（can ）：、、Enhanced

4.3 Interface

-Interface quality Productsperformance：

4.4 Quality Control

TestingAgreement：

1. DimensionsInspection：Diameter、Verification、CladdingThickness
2. Testing：Resistance、conductivityCalculation
3. MechanicsTesting：Tensile Strength、Elongation、Strength
4. Surfacequality：、Surface、DefectInspection

5. PerformanceOptimization

5.1 ConductivityOptimization

Design：CladdingThickness、Coreconductivity、Interfacequality

Optimization：

its ηefficiency 。

5.2 StrengthOptimization

5.3 analysis

6. EconomicsAnalysis

6.1 material cost structure

Data：^[6]

6.2 cost (TCO)

TCO：

1. material cost：/cost
2. Installationcost：、Termination
3. Operationcost：、efficiency
4. Maintenancecost：、Replacement
5. ：Recyclingvalue

6.3 analysis

for CCA（15%Volume Ratio）：

ExampleCalculation：

• ：100 kg Cu
• CCAetc.：15 kg Cu + 85 kg Al
• ：85 kg × $12.89/kg = $1,095
• cost ：85 kg × $2.50/kg = $212
• ：$883（decreases 47%）

7. ApplicationsOverview

7.1 application map

7.2 Selection Guide

decision framework：

step 1：requires - current 、Operating Temperature、EnvironmentConditions、requirements、

step 2： - Troubleshooting material 、regulatory requirements

step 3：comparison - technology comparison、analysis、can Verification

step 4：VerificationDesign - Testing、applicationsVerification

8. standardsSpecifications

8.1 standards

8.2 sectionRegulations

(NEC)：CCAin applications makes ，requires ，Dimensions

(HD 60364)：CCA，Installationrequirements，Compatibilityrequirements

(GBstandards)：Acceptanceimproves ，Dimensions，requires quality certification

8.3 certificationRequirements

9.

9.1 technology trend

Development：

1. Core：High strength（6xxx、7xxx）、Optimization、
2. Processinnovation：Cladding、in quality Monitoring、Inspection
3. applicationsExpansion：Electric VehicleCharging、can RegenerationSystem、Data Center、5G/6G

9.2 market

Data：Market Research Future^[7]

9.3 research

Keyresearch Section：

1. Interface and Optimization
2. High strengthCore
3. Sustainability and Recycling
4. Modeling and
5. applicationsmaterial Design

10. Conclusion

10.1 Key

1. material provides performance，achieves
2. Material Selectionrequires SystemAssessment、、Environment and
3. Manufacturingquality important——InterfaceIntegrityperformance
4. can 30-50%cost，simultaneously maintains performance
5. comply withstandardsmarket ensures Reliability

10.2 Recommendations

for Engineer：in Designprocess Assessment，cost material cost ，VerificationapplicationsstandardsCompliance

for ：Supplier，InspectionAgreement，Monitoringmaterial cost trend

for management ：material value ，applicationsVerification，RegulationsDevelopment