Rui Zhang. A Novel Interesting Field

1
Composite Materials A novel interesting
field Rui Zhang zhangray_at_zzu.edu.cn
2
What do we want?

• The most advanced information
• The most useful technique
• The most practical training

3

• Outline
• What are Composite Materials?
• New Uses for Composites
• How to make Composites?
• What can we learn from the study on Composites?
• What left for us to do in the coming study ?
• What can we be in our future?

4

• What are Composite Materials
• Composites Art and Science making and using
  materials
• those did not appear until several years
  ago, and those do not exit now and will be
  discovered in the future
• composed of at least 2 different kinds of
  materials
• 1. Ceramics Ceramics
• Al2O3 Y2O3 (YAG) transparent, new
  laser generator
• 2. Ceramics Organics SiC resin
• 3. Ceramics Metals (Cermet) Diamond
  Co

5

• New Uses of Composites

Structural Uses stronger, more flexible,
more reliable
1. In rocketry and missile
nose cone to withstand extreme
temperatures
2. In jet aircraft
protective composite coating
3. Machining tools
high speed cutting, polishing
4. Reinforcement clusters (Cu SiC)/ Fe, Al etc.
6
Functional uses energetic, sensitive, smart etc.
1 . Energetic cells
thermoelectric materials (for military
uses and for wild researches)
2. Luminescent materials Al2O3-Eu2O3-SrCO3
3. Environmental materials

• Porous composites
• Carbon Nano Tube (CNT) SiO2
• TiO2 SiO2
• CNT Nano Ag

7

• 4. Sensors
• more sensitive, accuracy

ZrO2-Y2O3
clean the air
other sensors of humidity, light, distance, toxic
gases
8
5. Electronics
substrates AlN Al Al2O3 Al SiC Cu etc
high thermal-releasing
property
capacitors BaTiO3 BN PbTiO3
PbMg1/3Nb2/3O3 SiTiO3
PbTiO3 etc high
dielectric property with low losses
SiC Al2O3 MgO SiO2

• 6. Smart items
• PTC
• Piezoelectrics nano robot

9

• How to make Composites?
• 1. Powder preparation even co-dispersion
• Mechanical method, Chemical method
• 2. Forming pressing, extrusion, casting
• 3. Firing the key process
• Conventional sintering,
• Hot-pressing,
• Vacuum sintering

10

• What can we learn from the study on Composites?
• Advanced Theories
• Chemistry and physics at high temperature
• Mechanical theories
• Microstructure theory
• Quantum theory (nanometer materials,
  superconductor)
• Electric, luminescent, magnetic, and thermal
  theories
• Other interdisciplinary theories

11

• advanced techniques
• The most advanced processing apparatus
• Microwave sintering
• 915 MHz or 2450 MHz
• volumetric heating, energy-saving, clean, rapid
  (0.5 h)
• Spark plasma sintering (SPS)
• high pulsed current, rather rapid
  (10 min)

12

• Advanced analysis technology
• X-ray diffraction (XRD)
• to identify the phases.
• Scanning electron microscope (SEM) to
• to observe the morphologies
• Transmission electron microscope (TEM) to
• to examine the bonding structures of different
  phases
• High resolution TEM (HRTEM) to
• to observe the atomic arrangement at the
  boundary

13
back
14
back
15
back
16
(No Transcript)
17
(No Transcript)
18

• Auger microscope (AES)
• to detect the surface elements.
• Energy dispersion spectra (EDS)
• to determine the elements

19

• Thermal analysis
• Differential scanning calorimetry
  (DSC), Thermogravimetry (TG),
• Mass spectroscopy (MS)
• to measure the thermodynamic behaviour
• useful for determination of heat treatment
  profile
• temperature, heating rate, protective
  atmosphere etc.

20
(No Transcript)
21
O2
CO2
22
What left for us to do in the coming study ?
Confidence!
Diligence !
Devotion !
Success and development !
23
What can we be in our future?
Scientists of Materials Science.
Engineers of Materials Engineering.
Researchers of Advanced materials
Bosses of Materials Enterprise.
Professors of Materials Science and Engineering
Senior Employee(Superintendent) in foreign
corporation
24
Nobel Prize Winner Prof. Kroto insists Doubt
and Question are the two prerequisites to do
scientific researches
25

• Thank you for your attention
• and Any questions?