Microstructure and High Temperature Properties of 85% Al2O3-15% SiO2 Fibers

1994 ◽  
Vol 350 ◽  
Author(s):  
D. M. Wilson ◽  
S. L. Lieder ◽  
D. C. Lueneburg
Keyword(s):  
Tensile Strength ◽  
High Temperature ◽  
Sol Gel ◽  
Two Phase ◽  
Single Filament ◽  
Polycrystalline Alumina ◽  
Creep Properties ◽  
High Temperature Properties ◽  
Alumina Fibers ◽  
High Temperature Tensile

AbstractA new sol/gel fiber which exhibits exceptional high temperature properties was recently developed at 3M. This fiber has the composition 85% Al2O3-15% SiO2 (85A-15S). High temperature tensile strength and creep properties were measured in the temperature range 1000°C – 1300°C. The creep rate for the 85A-15S fibers was three orders of magnitude less than single phase polycrystalline alumina fibers such as Nextel 610, and 90% of room tensile strength was retained at 1250°C. These exceptional high temperature properties were attributed to a unique, two-phase microstructure consisting of globular and elongated grains of a-Al2O3 and mullite (3Al2O3-2SiO2). The room temperature single filament strength of the 85% Al2O3-15% SiO2 fibers was 2130 MPa, and the elastic modulus was 260 GPa.

scholarly journals Microstructural evolution and Mechanical Properties of a Newly Developed Ti2AlNb-based alloy

2020 ◽  
Vol 321 ◽  
pp. 11064
Author(s):  
Yongsheng HE ◽  
Wenzhong LUO ◽  
Yujun DU ◽  
Ming WU ◽  
Kaixuan Wang ◽  
...  
Keyword(s):  
Tensile Strength ◽  
High Temperature ◽  
Room Temperature ◽  
Phase Region ◽  
High Plasticity ◽  
Phase Zone ◽  
Creep Properties ◽  
Three Phase ◽  
High Temperature Tensile ◽  
High Temperature Tensile Properties

The effects of the microstructure on the tensile and creep properties of the alloy at room temperature and high temperature were investigated by controlling the microstructures of the alloy by different hot working processes. It is found that the lath microstructure obtained by forging in B2 single phase zone has high tensile strength. The tensile strength is 1188 MPa at room temperature and 950 MPa at high temperature. The equiaxed structure obtained by forging in O+B2 phase region has the characteristics of high plasticity, creep resistance and low tensile strength. The elongation at room temperature is 9.0%, and the elongation at high temperature is 36%. The ambient temperature, high temperature tensile properties of the dual microstructure obtained by forging in the three-phase zone of α2+O+B2 are between the lath and the equiaxed microstructure.

The Effects of Nb and Cr Addition on Mechanical and Chemical Properties of Cold-Rolled Ni3(Si,Ti) Intermetallic Foils

2007 ◽  
Vol 561-565 ◽  
pp. 411-414 ◽  
Author(s):  
Yasuyuki Kaneno ◽  
Takayuki Takasugi
Keyword(s):  
Tensile Strength ◽  
High Temperature ◽  
Room Temperature ◽  
Chemical Properties ◽  
Solid Solution Phase ◽  
Two Phase ◽  
Thermomechanical Process ◽  
Thin Foils ◽  
Cold Rolled ◽  
High Temperature Tensile

Nb and/or Cr added Ni3(Si,Ti) as well as unalloyed Ni3(Si,Ti) intermetallic thin foils (i.e., Ni3(Si,Ti), Ni3(Si,Ti)+Nb, Ni3(Si,Ti)+Cr and Ni3(Si,Ti)+Nb,Cr) were fabricated from arc-melted polycrystalline ingots by thermomechanical process and subsequent heavy cold-rolling. Tensile property at room temperature as well as at high temperature and oxidization behavior of the cold-rolled foils with a thickness of ~200μm were investigated. The Ni3(Si,Ti) and Ni3(Si,Ti)+Nb alloys showed a single-phase microstructure consisting of L12 phase, while the Ni3(Si,Ti)+Cr and Ni3(Si,Ti)+Nb,Cr alloys exhibited a two-phase microstructure with A1 (fcc) Ni solid solution phase within the L12 grains. All the cold-rolled foils showed high tensile strength (over 2GPa) at room temperature although no plastic elongation was observed. The addition of Nb and/or Cr slightly enhanced the room-temperature tensile strength of the Ni3(Si,Ti) alloy. On the other hand, the addition of Nb and/or Cr prominently enhanced high-temperature tensile strength as well as oxidization resistance, while the addition of Cr improved high-temperature elongation.

HIGH-TEMPERATURE TENSILE STRENGTH DETERMINATION OF SINGLE CRYSTAL ALUMINA FIBERS

2014 ◽  
Vol 0 (4) ◽  
pp. 3-3 ◽  
Author(s):  
O.V. Basargin ◽  
◽  
T.M. Scheglova ◽  
V.J. Nikitina ◽  
V.I. Svistunov ◽  
...  
Keyword(s):  
Tensile Strength ◽  
High Temperature ◽  
Single Crystal ◽  
Strength Determination ◽  
Alumina Fibers ◽  
High Temperature Tensile

Influence of Heat Treatment Process on Properties of Polycrystalline Alumina Fiber

2011 ◽  
Vol 399-401 ◽  
pp. 822-827 ◽  
Author(s):  
Jian Feng Xu ◽  
Shun De Fu ◽  
Ke Zhang
Keyword(s):  
Tensile Strength ◽  
Specific Surface ◽  
Heating Rate ◽  
Surface Area ◽  
Specific Surface Area ◽  
Sol Gel ◽  
Polycrystalline Alumina ◽  
Average Tensile Strength ◽  
Alumina Fibers ◽  
Crystalline Growth

Polycrystalline alumina fibers were prepared by sol-gel method. The influence of heating rate on average tensile strength of fibers as well as the influence of calcining temperature on average tensile strength of fibers, crystal phases form, specific surface area of fibers were studied. The results show that when the heating rate (below 600°C) is 4°C/min,the average tensile strength of fibers over 1000Mpa The fibers pulverize obviously when the heating rate＞7°C/min. The average tensile strength and the specific surface area of fibers decreased with calcining temperature rising. When the calcining temperature reaches over 1300°C, the average tensile strength of fibers decreased quickly and the specific surface area of fibers decreases slowly for the crystalline growth.

High Temperature Mechanical Properties of Al2O3/ZrO2(Y2O3)Fibers

1994 ◽  
Vol 365 ◽  
Author(s):  
A. Sayir ◽  
S. C. Farmer ◽  
P. O. Dickerson ◽  
H. M. Yun
Keyword(s):  
Tensile Strength ◽  
High Temperature ◽  
Single Crystal ◽  
Creep Resistance ◽  
Directionally Solidified ◽  
Two Phase ◽  
High Temperature Mechanical Properties ◽  
Crystal Fibers ◽  
High Temperature Tensile ◽  
Laser Heated

ABSTRACTIn-situ composite fibers produced by directional solidification of two phase oxide eutectics are one means of producing fibers with good strength and higher creep resistance than single crystal fibers. In this work, directionally solidified alumina-yttria stabilized zirconia eutectic fibers have been grown by the laser heated float zone (LHFZ) method at NASA Lewis. The average tensile strength of the alumina-zirconia (60.8 m/o Al2O3; 39.2 m/o ZrO2 (9.5 m/o Y2O3)) eutectic fibers was 1.2 GPa at room temperature. The high temperature tensile strength and creep resistance of the eutectic fiber were determined and compared to single crystal Al2O3.

The High-Temperature Tensile Test of Quartz Fiber Fabric- Reinforced Resin Composites

2021 ◽  
Vol 904 ◽  
pp. 188-195
Author(s):  
Hua Qiong Wang ◽  
Li Li Zhang ◽  
Da Cheng Jiao ◽  
Yan Ru Wang ◽  
Zeng Hua Gao
Keyword(s):  
Tensile Strength ◽  
High Temperature ◽  
Tensile Test ◽  
Tensile Properties ◽  
Tensile Modulus ◽  
National Standard ◽  
Resin Composites ◽  
Quartz Fiber ◽  
High Temperature Tensile ◽  
Fiber Fabric

The tensile properties of quartz fiber fabric-reinforced resin composites at high temperature were studied. The effects of specimen type and dimension, temperature loading procedure, holding time and loading rate on the tensile properties of the composites at high temperatures were analyzed through series of comparative experiments, the tensile test parameters were determined. Chinese national standard for high-temperature tensile property testing of the composites was compiled based on the data collected. According to the established standard, the tensile testing at 500°C was carried out. Compared with the tensile properties at room temperature, the tensile strength and tensile modulus of the composite at high temperature decreases significantly, with the tensile strength decreasing by about 42.32% and the tensile modulus decreasing by about 24.18%. This is mainly due to the high temperature which causes part of the resin matrix to pyrolyze and detach from around the fiber, thus losing the integrity of the material. In addition, this national standard for high-temperature tensile properties has some general applicability to different types of fiber-reinforced resin composites.

Comparative investigation of high-temperature tensile strength of zirconia concretes

Refractories ◽  
1990 ◽  
Vol 31 (7-8) ◽  
pp. 446-448
Author(s):  
O. V. Bakunov ◽  
L. B. Borovkova ◽  
T. A. Melekhina ◽  
E. P. Pakhomov
Keyword(s):  
Tensile Strength ◽  
High Temperature ◽  
Comparative Investigation ◽  
High Temperature Tensile
Sign in / Sign up

Export Citation Format

Share Document