SBIR Phase I: Advanced, Polycrystalline t'-Zirconia Ceramics for High Temperature Applications

SBIR 第一阶段：用于高温应用的先进多晶 t-氧化锆陶瓷

• 批准号: 9660417
• 负责人: Jan-Fong Jue
• 金额: $ 7.5万
• 依托单位: MATERIALS & SYSTEMS RESEARCH INC
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-01-01 至 1997-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9660417&HistoricalAwards=false
• 关键词: SBIR; Phase; Advanced; Polycrystalline; Zirconia

*** 9660417 Jue This Phase I Small Business Innovation Research project will fabricate polycrystalline t'-zirconia ceramics for advanced applications. Polycrystalline t'-zirconia differs from regular tetragonal (t-phase) zirconia (TZP) in both fabrication procedure and properties. TZP ceramics are sintered at ~1500(C, exhibit high strength, high toughness, but exhibit low creep resistance, and low temperature aging. t'-zirconia are sintered at higher temperatures, exhibit moderate strength, high toughness, high creep resistance, and no low temperature aging. Resistance to creep and low temperature aging makes t'-zirconia ceramics superior to TZP for many low and high temperature applications. Polycrystalline t'-zirconia ceramics of a fine surface grain structure will be made by high temperature direct resistive heating above 2000(C and surface cooling. Highly creep resistant, strong, tough and transformation-resistant zirconia ceramics will be fabricated in Phase I. Heating elements of t'-zirconia will be fabricated and evaluated The potential commercial applications of polycrystalline t'-zirconia ceramics include: (1) heating elements for furnaces, (2) refractories, (3) kiln furniture, (4) liners for chemical reactors requiring resistance to attack by water, acids, alkalis, (5) storage heaters, (6) substrates for superconductors, and (7) structural components requiring high creep resistance.

*** 9660417 Jue 第一阶段小型企业创新研究项目将制造用于先进应用的多晶t'-氧化锆陶瓷。 多晶 t'-氧化锆在制造过程和性能方面均不同于常规四方（t 相）氧化锆 (TZP)。 TZP陶瓷在~1500℃下烧结，表现出高强度、高韧性，但表现出低蠕变性和低温老化性。t'-氧化锆在较高温度下烧结，表现出中等强度、高韧性、高抗蠕变性，并且无低温老化性。抗蠕变性和低温老化性使得t'-氧化锆陶瓷在许多低温和高温应用中优于TZP。 具有精细表面晶粒结构的多晶t'-氧化锆陶瓷将通过2000℃以上的高温直接电阻加热和表面冷却来制造。第一阶段将制造高抗蠕变、高强度、坚韧和抗转变的氧化锆陶瓷。将制造和评估t'-氧化锆加热元件。多晶t'-氧化锆陶瓷的潜在商业应用包括： (1) 熔炉加热元件，(2) 耐火材料，(3) 窑具，(4) 需要耐水、酸、碱侵蚀的化学反应器衬里，(5) 储热加热器，(6) 超导体基材，以及 (7) 需要高抗蠕变性的结构部件。